Records |
Author |
Baelus, B.J.; Kanda, A.; Peeters, F.M.; Ootuka, Y.; Kadowaki |
Title |
Different temperature dependence of the phase boundary for multivortex and giant vortex states in mesoscopic superconductors |
Type |
P1 Proceeding |
Year |
2006 |
Publication |
AIP conference proceedings
T2 – 24th International Conference on Low Temperature Physics (LT24), AUG 10-17, 2005, Orlando, FL |
Abbreviated Journal |
|
Volume |
|
Issue |
|
Pages |
743-744 |
Keywords |
P1 Proceeding; Condensed Matter Theory (CMT) |
Abstract |
Within the framework of the nonlinear Ginzburg-Landau theory, we calculated the full phase diagram for a superconducting disk with radius R = 4 (T = 0) and we studied the behavior of the penetration and expulsion fields as a function of temperature for multivortex and giant vortex states. |
Address |
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Corporate Author |
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Thesis |
|
Publisher |
Amer inst physics |
Place of Publication |
Melville |
Editor |
|
Language |
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Wos |
|
Publication Date |
0000-00-00 |
Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume ![sorted by Series Volume (numeric) field, descending order (down)](img/sort_desc.gif) |
850 |
Series Issue |
Part a-b |
Edition |
|
ISSN |
0-7354-0347-3; 0094-243x |
ISBN |
|
Additional Links |
UA library record; WoS full record; |
Impact Factor |
|
Times cited |
|
Open Access |
|
Notes |
|
Approved |
Most recent IF: NA |
Call Number |
UA @ lucian @ c:irua:103642 |
Serial |
696 |
Permanent link to this record |
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|
|
Author |
Kanda, A.; Baelus, B.J.; Peeters, F.M.; Kadowaki, K.; Ootuka, Y. |
Title |
Experimental distinction between giant vortex and multivortex states in mesoscopic superconductors |
Type |
P1 Proceeding |
Year |
2006 |
Publication |
AIP conference proceedings
T2 – 24th International Conference on Low Temperature Physics (LT24), AUG 10-17, 2005, Orlando, FL |
Abbreviated Journal |
|
Volume |
|
Issue |
|
Pages |
739-742 |
Keywords |
P1 Proceeding; Condensed Matter Theory (CMT) |
Abstract |
We describe an experimental distinction between giant vortex and multivortex states in mesoscopic superconducting disks by using two methods: the multiple-small-tunnel-junction method and the temperature dependence of vortex expulsion fields. The experimental results are in good agreement with the theoretical simulations based on the non-linear Ginzburg-Landau theory. |
Address |
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Corporate Author |
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Thesis |
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Publisher |
|
Place of Publication |
New York |
Editor |
|
Language |
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Wos |
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Publication Date |
0000-00-00 |
Series Editor |
|
Series Title |
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Abbreviated Series Title |
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Series Volume ![sorted by Series Volume (numeric) field, descending order (down)](img/sort_desc.gif) |
850 |
Series Issue |
|
Edition |
|
ISSN |
0-7354-0347-3; 0094-243x |
ISBN |
|
Additional Links |
UA library record; WoS full record; |
Impact Factor |
|
Times cited |
|
Open Access |
|
Notes |
|
Approved |
Most recent IF: NA |
Call Number |
UA @ lucian @ c:irua:103641 |
Serial |
1138 |
Permanent link to this record |
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|
|
Author |
Nguyen, N.T.T.; Peeters, F.M. |
Title |
Phase-diagram for the magnetic states of the Mn-ion subsystem in a magnetic quantum dot |
Type |
P1 Proceeding |
Year |
2010 |
Publication |
Journal of physics : conference series
T2 – Conference on Quantum Dots 2010 (QD2010), APR 26-30, 2010, Nottingham, ENGLAND |
Abbreviated Journal |
|
Volume |
|
Issue |
|
Pages |
012032-12034 |
Keywords |
P1 Proceeding; Engineering sciences. Technology; Condensed Matter Theory (CMT) |
Abstract |
The interplay between two types of spin-spin exchange interaction (namely of the electron with the Mn-ions and the Mn-ions with each other) that are governed by the positions of the Mn-ions and the magnetic field is studied in the case of a Mn-ion doped CdTe quantum dot. We investigate the formation of different magnetic phases and the existence of frustrated magnetic states due to the dominant contribution of the Mn-Mn energy. |
Address |
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Corporate Author |
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Thesis |
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Publisher |
|
Place of Publication |
Bristol |
Editor |
|
Language |
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Wos |
000294907400032 |
Publication Date |
2010-09-21 |
Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume ![sorted by Series Volume (numeric) field, descending order (down)](img/sort_desc.gif) |
245 |
Series Issue |
|
Edition |
|
ISSN |
1742-6596; |
ISBN |
|
Additional Links |
UA library record; WoS full record |
Impact Factor |
|
Times cited |
|
Open Access |
|
Notes |
; ; |
Approved |
Most recent IF: NA |
Call Number |
UA @ lucian @ c:irua:113081 |
Serial |
2582 |
Permanent link to this record |
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|
|
Author |
Nguyen, N.T.T.; Peeters, F.M. |
Title |
The breakdown of Kohn's theorem in few-electron parabolic quantum dots doped with a single magnetic impurity Mn2+ |
Type |
P1 Proceeding |
Year |
2010 |
Publication |
Journal of physics : conference series
T2 – Conference on Quantum Dots 2010 (QD2010), APR 26-30, 2010, Nottingham, ENGLAND |
Abbreviated Journal |
|
Volume |
|
Issue |
|
Pages |
012031-12034 |
Keywords |
P1 Proceeding; Engineering sciences. Technology; Condensed Matter Theory (CMT) |
Abstract |
The cyclotron resonance (CR) absorption spectrum is calculated for a II-VI parabolic quantum dot (QD) containing few electrons and a single magnetic dopant (Mn(2+)). We find that Kohn's theorem no longer holds for this system and that the CR spectrum depends on the number of electrons inside the QD. The electron-Mn-ion interaction strength can be tuned for example by the magnetic field and by moving the Mn-ion to different positions inside the QD. We demonstrate that due to the presence of the Mn-ion the relative motion of the electrons couple with their center-of-mass motion through the electron-Mn-ion spin-spin exchange term resulting in an electron-electron interaction dependence of the magneto-optical absorption spectrum. At the ferromagnetic-antiferromagnetic transition we observe significant discontinuities in the CR lines. |
Address |
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Corporate Author |
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Thesis |
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Publisher |
|
Place of Publication |
Bristol |
Editor |
|
Language |
|
Wos |
000294907400031 |
Publication Date |
2010-09-21 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume ![sorted by Series Volume (numeric) field, descending order (down)](img/sort_desc.gif) |
245 |
Series Issue |
|
Edition |
|
ISSN |
1742-6596; |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
|
Times cited |
1 |
Open Access |
|
Notes |
; ; |
Approved |
Most recent IF: NA |
Call Number |
UA @ lucian @ c:irua:113080 |
Serial |
3572 |
Permanent link to this record |
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|
|
Author |
Van Aert, S.; Batenburg, J.; Van Tendeloo, S. |
Title |
Atomen tellen |
Type |
A3 Journal article |
Year |
2011 |
Publication |
Nederlands tijdschrift voor natuurkunde (1991) |
Abbreviated Journal |
|
Volume |
77 |
Issue |
8 |
Pages |
292-295 |
Keywords |
A3 Journal article; Electron microscopy for materials research (EMAT); Vision lab |
Abstract |
|
Address |
|
Corporate Author |
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Thesis |
|
Publisher |
|
Place of Publication |
Amsterdam |
Editor |
|
Language |
|
Wos |
|
Publication Date |
0000-00-00 |
Series Editor |
|
Series Title |
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Abbreviated Series Title |
|
Series Volume ![sorted by Series Volume (numeric) field, descending order (down)](img/sort_desc.gif) |
|
Series Issue |
|
Edition |
|
ISSN |
0926-4264 |
ISBN |
|
Additional Links |
UA library record |
Impact Factor |
|
Times cited |
|
Open Access |
|
Notes |
|
Approved |
Most recent IF: NA |
Call Number |
UA @ lucian @ c:irua:94119 |
Serial |
164 |
Permanent link to this record |
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|
|
Author |
Fedina, L.; Gutakovskii, A.; Aseev, A.; van Landuyt, J.; Vanhellemont, J. |
Title |
Clustering of vacancies on {113} planes in Si layers close to Si-Si3N4 interfaces and further aggregation of self-interstitials inside vacancy clusters during electron irradiation |
Type |
A1 Journal article |
Year |
1999 |
Publication |
Institute of physics conference series
T2 – Conference on Microscopy of Semiconducting Materials, MAR 22-25, 1999, UNIV OXFORD, OXFORD, ENGLAND |
Abbreviated Journal |
Inst Phys Conf Ser |
Volume |
|
Issue |
164 |
Pages |
495-498 |
Keywords |
A1 Journal article; Electron microscopy for materials research (EMAT) |
Abstract |
In situ HREM irradiation of (110) FZ-Si crystals covered with thin Si3N4 films was carried out in a JEOL-4000EX microscope, operated at 400 keV at room temperature. It is found that clustering of vacancies on (113) planes is realised in a Si layer close to the Si-Si3N4 interface at the initial stage of irradiation. Further aggregation of self-interstitials inside vacancy clusters is considered as an alternative way of point defect recombination in extended shape, to be accomplished with the formation of the extended defects of interstitial type upon interstitial supersaturation. |
Address |
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Corporate Author |
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Thesis |
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Publisher |
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Place of Publication |
|
Editor |
|
Language |
|
Wos |
000166835300106 |
Publication Date |
0000-00-00 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume ![sorted by Series Volume (numeric) field, descending order (down)](img/sort_desc.gif) |
|
Series Issue |
|
Edition |
|
ISSN |
0-7503-0650-5; 0951-3248 |
ISBN |
|
Additional Links |
UA library record; WoS full record; |
Impact Factor |
|
Times cited |
|
Open Access |
|
Notes |
|
Approved |
Most recent IF: NA |
Call Number |
UA @ lucian @ c:irua:102918 |
Serial |
376 |
Permanent link to this record |
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|
|
Author |
Chwiej, T.; Bednarek, S.; Adamowski, J.; Szafran, B.; Peeters, F.M. |
Title |
Coulomb-interaction driven anomaly in the Stark effect for an exciton in vertically coupled quantum dots |
Type |
A1 Journal article |
Year |
2005 |
Publication |
Journal of luminescence
T2 – 6th International Conference on Excitonic Processes in Condensed Matter, (EXCON 04), JUL 06-09, 2004, Cracow, POLAND |
Abbreviated Journal |
J Lumin |
Volume |
112 |
Issue |
1-4 |
Pages |
122-126 |
Keywords |
A1 Journal article; Condensed Matter Theory (CMT) |
Abstract |
The effect of the electric field on an exciton confined in a pair of vertically coupled quantum dots is studied. We use a single-band approximation and a parabolic model potential. As a result of these idealizations, we obtain a numerically solvable model, which is used to describe the influence of the electron-hole interaction on the Stark effect for the lowest-energy photo luminescence lines. We show that for intermediate tunnel coupling between the dots this interaction leads to an anomalous Stark effect with an essential deviation of the recombination energy from the usual quadratic dependence on the electric field. (c) 2004 Elsevier B.V. All rights reserved. |
Address |
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Corporate Author |
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Thesis |
|
Publisher |
|
Place of Publication |
Amsterdam |
Editor |
|
Language |
|
Wos |
000228439600029 |
Publication Date |
2004-12-06 |
Series Editor |
|
Series Title |
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Abbreviated Series Title |
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Series Volume ![sorted by Series Volume (numeric) field, descending order (down)](img/sort_desc.gif) |
|
Series Issue |
|
Edition |
|
ISSN |
0022-2313; |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
2.686 |
Times cited |
10 |
Open Access |
|
Notes |
|
Approved |
Most recent IF: 2.686; 2005 IF: 1.518 |
Call Number |
UA @ lucian @ c:irua:103675 |
Serial |
532 |
Permanent link to this record |
|
|
|
Author |
Deveirman, A.; van Landuyt, J.; Vanhellemont, J.; Maes, H.E.; Yallup, K. |
Title |
Defects in high-dose oxygen implanted silicon : a TEM study |
Type |
A1 Journal article |
Year |
1991 |
Publication |
Vacuum: the international journal and abstracting service for vacuum science and technology
T2 – 1ST SIOMX WORKSHOP ( SEPARATION BY IMPLANTATION OF OXYGEN ) ( SWI-88 ), NOV 07-08, 1988, UNIV SURREY, GUILDFORD, ENGLAND |
Abbreviated Journal |
Vacuum |
Volume |
42 |
Issue |
5-6 |
Pages |
367-369 |
Keywords |
A1 Journal article; Electron microscopy for materials research (EMAT) |
Abstract |
Results are discussed of a transmission electron microscopy study of high-dose oxygen implanted silicon. In addition to the general high temperature (> 1200-degrees-C) annealing treatments also annealings at 'low' temperatures (1000-1100-degrees-C) were performed in order to slow down the precipitate and defect reactions. The observed dissolution of the oxide precipitates during prolonged high temperature annealing is explained by critical radius considerations. Threading dislocations are the remaining lattice defects in the silicon overlayer and cannot be removed by further annealing. Low temperature annealing results in the formation and subsequent unfaulting of extrinsic stacking fault loops below the buried oxide layer. |
Address |
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Corporate Author |
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Thesis |
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Publisher |
|
Place of Publication |
Oxford |
Editor |
|
Language |
|
Wos |
A1991EV61700007 |
Publication Date |
2002-10-19 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
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Series Volume ![sorted by Series Volume (numeric) field, descending order (down)](img/sort_desc.gif) |
|
Series Issue |
|
Edition |
|
ISSN |
0042-207X; |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
1.858 |
Times cited |
4 |
Open Access |
|
Notes |
|
Approved |
MATERIALS SCIENCE, MULTIDISCIPLINARY 96/271 Q2 # |
Call Number |
UA @ lucian @ c:irua:104022 |
Serial |
629 |
Permanent link to this record |
|
|
|
Author |
Hens, S.; Bender, H.; Donaton, R.A.; Maex, K.; Vanhaelemeersch, S.; van Landuyt, J. |
Title |
EFTEM study of plasma etched low-k Si-O-C dielectrics |
Type |
A1 Journal article |
Year |
2001 |
Publication |
Institute of physics conference series
T2 – Royal-Microscopical-Society Conference on Microscopy of Semiconducting, Materials, MAR 25-29, 2001, UNIV OXFORD, OXFORD, ENGLAND |
Abbreviated Journal |
|
Volume |
|
Issue |
169 |
Pages |
415-418 |
Keywords |
A1 Journal article; Electron microscopy for materials research (EMAT) |
Abstract |
Materials with low dielectric constant ("low-k'') in combination with Cu metallization are replacing the oxide based dielectrics with Al metallization in future generations of micro-electronic devices. In this work, a carbon doped oxide low-k dielectric material is studied after different kinds of etch/strip steps in single damascene Cu. filled line structures. Interline capacitance measurements indicate a dependence of the dielectric constant on the strip conditions. EFTEM is used to study the composition of the dielectric material and the modification of the low-k material at the sidewall of the etched structures for the various treatment conditions. |
Address |
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Corporate Author |
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Thesis |
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Publisher |
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Place of Publication |
|
Editor |
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Language |
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Wos |
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Publication Date |
0000-00-00 |
Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume ![sorted by Series Volume (numeric) field, descending order (down)](img/sort_desc.gif) |
|
Series Issue |
|
Edition |
|
ISSN |
0-7503-0818-4; 0951-3248 |
ISBN |
|
Additional Links |
UA library record; WoS full record; |
Impact Factor |
|
Times cited |
|
Open Access |
|
Notes |
|
Approved |
Most recent IF: NA |
Call Number |
UA @ lucian @ c:irua:103432 |
Serial |
877 |
Permanent link to this record |
|
|
|
Author |
Fedina, L.; Gutakovskii, A.; Aseev, A.; van Landuyt, J.; Vanhellemont, J. |
Title |
Extended defects formation in Si crystals by clustering of intrinsic point defects studied by in-situ electron irradiation in an HREM |
Type |
A1 Journal article |
Year |
1999 |
Publication |
Physica status solidi: A: applied research
T2 – International Conference on Extended Defects in Semiconductors (EDS 98), Sept. 06-11, 1998, Jaszowiec, Poland |
Abbreviated Journal |
Phys Status Solidi A |
Volume |
171 |
Issue |
1 |
Pages |
147-157 |
Keywords |
A1 Journal article; Electron microscopy for materials research (EMAT) |
Abstract |
In situ irradiation experiments in a high resolution electron microscope JEOL-4000EX at room temperature resulted in discovery of the isolated and combined clustering of vacancies and self-interstitial atoms on {111}- and {113}-habit planes both leading to an extended defect formation in Si crystals. The type of the defect is strongly affected by the type of supersaturation of point defects depending on the crystal thickness during electron irradiation. Because of the existence of energy barriers against recombination of interstitials with the extended aggregates of vacancies, a large family of intermediate defect configurations (IDCs) is formed on {113}- and {111}-habit planes at a low temperature under interstitial supersaturation in addition to the well-known {133}-defects of interstitial type. The formation of metastable IDCs inside vacancy aggregates prevents a way of recombination of defects in extended shape. |
Address |
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Corporate Author |
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Thesis |
|
Publisher |
Wiley |
Place of Publication |
Berlin |
Editor |
|
Language |
|
Wos |
000078539700020 |
Publication Date |
2002-09-10 |
Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume ![sorted by Series Volume (numeric) field, descending order (down)](img/sort_desc.gif) |
|
Series Issue |
|
Edition |
|
ISSN |
0031-8965;1521-396X; |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
|
Times cited |
40 |
Open Access |
|
Notes |
|
Approved |
Most recent IF: NA |
Call Number |
UA @ lucian @ c:irua:95798 |
Serial |
1152 |
Permanent link to this record |
|
|
|
Author |
Peelaers, H.; Partoens, B.; Peeters, F.M. |
Title |
Free-standing Si and Ge, and Ge/Si core-shell semiconductor nanowires |
Type |
A1 Journal article |
Year |
2012 |
Publication |
Acta physica Polonica: A: general physics, solid state physics, applied physics
T2 – WELCOME Scientific Meeting on Hybrid Nanostructures, AUG 28-31, 2011, Torun, POLAND |
Abbreviated Journal |
Acta Phys Pol A |
Volume |
122 |
Issue |
2 |
Pages |
294-298 |
Keywords |
A1 Journal article; Condensed Matter Theory (CMT) |
Abstract |
The properties of free-standing silicon and germanium nanowires oriented along the [110] direction are studied using different first principles methods. We show the corrections due to quasi-particles to the band structures obtained using the local-density approximation. The formation energies of B and P doped nanowires are calculated, both in the absence and presence of dangling bond defects and we link these to experimental results. Furthermore, we report on the phonon properties of pure Si and Ge nanowires, as well as Ge/Si core-shell nanowires, and discuss the differences between them. |
Address |
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Corporate Author |
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Thesis |
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Publisher |
|
Place of Publication |
Warszawa |
Editor |
|
Language |
|
Wos |
|
Publication Date |
0000-00-00 |
Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume ![sorted by Series Volume (numeric) field, descending order (down)](img/sort_desc.gif) |
|
Series Issue |
|
Edition |
|
ISSN |
0587-4246 |
ISBN |
|
Additional Links |
UA library record; WoS full record; |
Impact Factor |
0.469 |
Times cited |
|
Open Access |
|
Notes |
|
Approved |
Most recent IF: 0.469; 2012 IF: 0.531 |
Call Number |
UA @ lucian @ c:irua:101896 |
Serial |
1277 |
Permanent link to this record |
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|
|
Author |
Riva, C.; Peeters, F.M.; Varga, K. |
Title |
Ground state of excitons and charged excitons in a quantum well |
Type |
A1 Journal article |
Year |
2000 |
Publication |
Physica status solidi: A: applied research
T2 – 6th International Conference on Optics of Excitons in Confined Systems, (OECS-6), AUG 30-SEP 02, 1999, ASCONA, SWITZERLAND |
Abbreviated Journal |
Phys Status Solidi A |
Volume |
178 |
Issue |
1 |
Pages |
513-517 |
Keywords |
A1 Journal article; Condensed Matter Theory (CMT) |
Abstract |
A variational calculation of the ground state of a neutral exciton and of positively and negatively charged excitons (trions) in a single quantum well is presented. We study the dependence of the correlation energy and of the binding energy on the well width and on the hole mass. Our results are compared with previous theoretical results and with available experimental data. |
Address |
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Corporate Author |
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Thesis |
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Publisher |
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Place of Publication |
Berlin |
Editor |
|
Language |
|
Wos |
000086440500089 |
Publication Date |
2002-09-11 |
Series Editor |
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Series Title |
|
Abbreviated Series Title |
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Series Volume ![sorted by Series Volume (numeric) field, descending order (down)](img/sort_desc.gif) |
|
Series Issue |
|
Edition |
|
ISSN |
0031-8965;1521-396X; |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
|
Times cited |
16 |
Open Access |
|
Notes |
|
Approved |
Most recent IF: NA |
Call Number |
UA @ lucian @ c:irua:103467 |
Serial |
1389 |
Permanent link to this record |
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|
|
Author |
Nistor, L.; Bender, H.; van Landuyt, J.; Nemeth, S.; Boeve, H.; De Boeck, J.; Borghs, G. |
Title |
HREM investigation of a Fe/GaN/Fe tunnel junction |
Type |
A1 Journal article |
Year |
2001 |
Publication |
Institute of physics conference series
T2 – Royal-Microscopical-Society Conference on Microscopy of Semiconducting, Materials, MAR 25-29, 2001, Univ of Oxford, Oxford, England |
Abbreviated Journal |
|
Volume |
|
Issue |
169 |
Pages |
53-56 |
Keywords |
A1 Journal article; Electron microscopy for materials research (EMAT) |
Abstract |
The structure of Fe/GaN/Fe ferromagnetic electrodes is studied by high resolution transmission electron microscopy. The layers grow epitaxially on the GaAs substrate with the top Fe layer 90degrees rotated compared to the bottom one. The interfaces are quite rough. There is an indication of the possible occurrence of Fe3GaAs formation on the GaAs interface. |
Address |
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Corporate Author |
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Thesis |
|
Publisher |
IOP Publishing |
Place of Publication |
Bristol |
Editor |
|
Language |
|
Wos |
|
Publication Date |
0000-00-00 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
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Series Volume ![sorted by Series Volume (numeric) field, descending order (down)](img/sort_desc.gif) |
|
Series Issue |
|
Edition |
|
ISSN |
0-7503-0818-4 |
ISBN |
|
Additional Links |
UA library record; WoS full record; |
Impact Factor |
|
Times cited |
|
Open Access |
|
Notes |
|
Approved |
Most recent IF: NA |
Call Number |
UA @ lucian @ c:irua:95715 |
Serial |
1503 |
Permanent link to this record |
|
|
|
Author |
Peeters, F.M.; Devreese, J.T.; Verbist, G. |
Title |
Possible (bi) polaron effects in the high-tc superconductors |
Type |
A1 Journal article |
Year |
1991 |
Publication |
Physica scripta
T2 – 11TH General Conf. Of the Condensed Matter Division of the European Physical Society, April 08-11, 1991, Exeter, England |
Abbreviated Journal |
Phys Scripta |
Volume |
T39 |
Issue |
|
Pages |
66-70 |
Keywords |
A1 Journal article; Condensed Matter Theory (CMT); Theory of quantum systems and complex systems |
Abstract |
In the present paper, the theory of the large bipolaron is reviewed and the possibility of bipolaron formation in the high-T(c) superconductors is indicated. Operator and path-integral formulations of the large bipolaron problem are compared. In the strong-coupling limit, the effect of non-optimal upper-bounds to the single-polaron groundstate energy is emphasized. The fact that the interaction with multiple phonon branches enhances the electron-phonon interaction and might result in a larger stability region for bipolaron formation is indicated. Experimental values for the static and high-frequency dielectric constants are used to discuss the relevance of bipolaron formation as a pair-forming mechanism in the high-T(c) superconductors. |
Address |
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Corporate Author |
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Thesis |
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Publisher |
Royal Swedish Acad. Sciences |
Place of Publication |
Stockholm |
Editor |
|
Language |
|
Wos |
A1991GV57300008 |
Publication Date |
2007-01-26 |
Series Editor |
|
Series Title |
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Abbreviated Series Title |
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Series Volume ![sorted by Series Volume (numeric) field, descending order (down)](img/sort_desc.gif) |
|
Series Issue |
|
Edition |
|
ISSN |
0031-8949;1402-4896; |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
1.126 |
Times cited |
29 |
Open Access |
|
Notes |
|
Approved |
no |
Call Number |
UA @ lucian @ c:irua:95974 |
Serial |
2683 |
Permanent link to this record |
|
|
|
Author |
Somsen, C.; Wassermann, E.F.; Kästner, J.; Schryvers, D. |
Title |
Precursor phenomena in a quenched and aged Ni52Ti48 shape memory alloy |
Type |
A1 Journal article |
Year |
2003 |
Publication |
Journal de physique: 4
T2 – 10th International Conference on Martensitic Transformations, JUN 10-14, 2002, ESPOO, FINLAND |
Abbreviated Journal |
J Phys Iv |
Volume |
112 |
Issue |
Part 2 |
Pages |
777-780 |
Keywords |
A1 Journal article; Electron microscopy for materials research (EMAT) |
Abstract |
We measured the electrical resistivity R(T) and specific heat C-p(T) between room temperature (RT) and 4.2 K as well as the microstructure by transmission electron microscopy (TEM) of a Ni-52 Ti-48 SMA quenched from 1000degreesC (B2-Phase range) to RT and then annealed for 1h at T=380degreesC, 550degreesC and 650degreesC. In the “as quenched” and the “650degreesC annealed” state no martensitic transformations (MT's) occur. The diffraction patterns show faint reflections originating from coherent Ni4Ti3 precipitates in an early state of formation. Additional reflections of the type 1/2 <110>, 1/2 <111> and 1/3 <110> result from various lattice displacement waves, which are precursors of the MT's to the B19' and R-phase, respectively. Indeed, high resolution TEM micrographs of the [001] zone of the “as quenched” sample reveal transverse 1/2 <110> <110> lattice displacement waves, precursors of the B19' martensite. The coherent Ni4Ti3 precipitates, homogeneously distributed on a small length scale, binder the MT's in the “as quenched” and the “650degreesC annealed” state, and thus only the precursors appear. When annealed at T=380degreesC, however, coherent Ni4Ti3 precipitates with a length of 10nm are clearly visible in TEM. These precipitates trigger the NIT from the B2 to the R-phase on cooling, as evidenced also by anomalies in R(T) and C-p(T). Annealing at T-550degreesC leads to the well known two step MT's from the B2 to the R-phase and then into the B19'-phase. These martensitic transitions are clearly seen as additional peaks in the specific heat and anomalies in the resistance, while the “as quenched” and 650degreesC annealed samples show weak features in R(T) and C-p(T). |
Address |
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Corporate Author |
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Thesis |
|
Publisher |
|
Place of Publication |
Les Ulis |
Editor |
|
Language |
|
Wos |
000186503400036 |
Publication Date |
2008-08-19 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume ![sorted by Series Volume (numeric) field, descending order (down)](img/sort_desc.gif) |
|
Series Issue |
|
Edition |
|
ISSN |
1155-4339; |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
|
Times cited |
2 |
Open Access |
|
Notes |
|
Approved |
Most recent IF: NA |
Call Number |
UA @ lucian @ c:irua:102791 |
Serial |
2694 |
Permanent link to this record |
|
|
|
Author |
Vasilopoulos; Peeters, F.M. |
Title |
Quantum magnetotransport of a 2-dimensional electron-gas subject to periodic electric or magnetic modulations |
Type |
A1 Journal article |
Year |
1991 |
Publication |
Physica scripta : supplements
T2 – 11TH GENERAL CONF OF THE CONDENSED MATTER DIVISION OF THE EUROPEAN, PHYSICAL SOC, APR 08-11, 1991, EXETER, ENGLAND |
Abbreviated Journal |
Phys Scripta |
Volume |
T39 |
Issue |
|
Pages |
177-181 |
Keywords |
A1 Journal article; Condensed Matter Theory (CMT) |
Abstract |
Electrical transport properties of the two-dimensional electron gas are studied in the presence of a perpendicular magnetic field B = Bz and of a weak one-dimensional electric (V0 cos (Kx)) or magnetic (B0 = B0 cos (Kx)z) modulation where B0 << B, K = 2-pi/a, and a is the modulation period. In either case the discrete Landau levels broaden into bands whose width: (1) is proportional to the modulation strength, (2) it oscillates with B, and (3) it gives rise to magnetoresistance oscillations, at low B, that are different in period and temperature dependence from the Shubnikov-de Haas (SdH) ones, at higher B. For equal energy modulation strengths, V0 = heB0/m*, the magnetic bandwidth at the Fermi energy is about one order of magnitude larger than the electric one. The same holds for the oscillation amplitude of the electrical magnetoresistivity tensor. For two-dimensional modulations the energy spectrum has the same structure but with different scales. For weak magnetic fields and equal modulation strengths the gaps in the spectrum can be much larger in the magnetic case thus making easier the observability of the spectrum's fine structure. |
Address |
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Corporate Author |
|
Thesis |
|
Publisher |
Royal swedish acad sciences |
Place of Publication |
Stockholm |
Editor |
|
Language |
|
Wos |
A1991GV57300028 |
Publication Date |
2007-01-26 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
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Series Volume ![sorted by Series Volume (numeric) field, descending order (down)](img/sort_desc.gif) |
|
Series Issue |
|
Edition |
|
ISSN |
0031-8949;1402-4896; |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
1.126 |
Times cited |
8 |
Open Access |
|
Notes |
|
Approved |
MATERIALS SCIENCE, MULTIDISCIPLINARY 96/271 Q2 # |
Call Number |
UA @ lucian @ c:irua:95508 |
Serial |
2778 |
Permanent link to this record |
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|
|
Author |
Lok, J.G.S.; Geim, A.K.; Maan, J.C.; Marmorkos, I.; Peeters, F.M.; Mori, N.; Eaves, L.; McDonnell, P.; Henini, M.; Sakai, J.W.; Main, P.C.; |
Title |
Resonant tunnelling through D- states |
Type |
A1 Journal article |
Year |
1996 |
Publication |
Surface science : a journal devoted to the physics and chemistry of interfaces
T2 – 11th International Conference on the Electronic Properties of 2-Dimensional Systems (EP2DS XI), August 07-11, 1995, Univ. Nottingham, Nottingham, England |
Abbreviated Journal |
Surf Sci |
Volume |
362 |
Issue |
1-3 |
Pages |
247-250 |
Keywords |
A1 Journal article; Condensed Matter Theory (CMT) |
Abstract |
We have studied tunnelling through Si donors incorporated in the quantum well of double barrier resonant tunnelling devices. In addition to a resonance associated with the ground state of a single donor (1s level), a novel donor-related resonance at a smaller binding energy is observed in high magnetic fields where it becomes dominant over the Is resonance. We attribute this novel feature to a D-minus state of a shallow donor. |
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
Elsevier |
Place of Publication |
Amsterdam |
Editor |
|
Language |
|
Wos |
A1996UZ03300061 |
Publication Date |
2002-07-26 |
Series Editor |
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Series Title |
|
Abbreviated Series Title |
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Series Volume ![sorted by Series Volume (numeric) field, descending order (down)](img/sort_desc.gif) |
|
Series Issue |
|
Edition |
|
ISSN |
0039-6028; |
ISBN |
|
Additional Links |
UA library record; WoS full record |
Impact Factor |
1.925 |
Times cited |
|
Open Access |
|
Notes |
|
Approved |
INSTRUMENTS & INSTRUMENTATION 31/56 Q3 # NUCLEAR SCIENCE & TECHNOLOGY 9/32 Q2 # PHYSICS, PARTICLES & FIELDS 24/28 Q4 # SPECTROSCOPY 28/43 Q3 # |
Call Number |
UA @ lucian @ c:irua:95892 |
Serial |
2895 |
Permanent link to this record |
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|
|
Author |
Croitoru, M.D.; Shanenko, A.A.; Peeters, F.M. |
Title |
Superconducting nanowires: quantum-confinement effect on the critical magnetic field and supercurrent |
Type |
A1 Journal article |
Year |
2009 |
Publication |
International journal of modern physics: B: condensed matter physics, statistical physics, applied physics
T2 – 32nd International Workshop on Condensed Matter Theories, Aug 12-19, 2008, Loughborough Univ, Loughborough, England |
Abbreviated Journal |
Int J Mod Phys B |
Volume |
23 |
Issue |
20-21 |
Pages |
4257-4268 |
Keywords |
A1 Journal article; Condensed Matter Theory (CMT); Electron microscopy for materials research (EMAT) |
Abstract |
We study the effect of electron confinement on the superconducting-to-normal phase transition driven by a magnetic field and/or on the current-carrying state of the superconducting condensate in nanowires. Our investigation is based on a self-consistent numerical solution of the Bogoliubov-de Gennes equations. We show that in a parallel magnetic field and/or in the presence of supercurrent the transition from superconducting to normal phase occurs as a cascade of discontinuous jumps in the superconducting order parameter for diameters D < 10 divided by 15 nm at T = 0. The critical magnetic field exhibits quantum-size oscillations with pronounced resonant enhancements. |
Address |
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Corporate Author |
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Thesis |
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Publisher |
World scientific |
Place of Publication |
Singapore |
Editor |
|
Language |
|
Wos |
000274525500026 |
Publication Date |
2009-09-23 |
Series Editor |
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Series Title |
|
Abbreviated Series Title |
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Series Volume ![sorted by Series Volume (numeric) field, descending order (down)](img/sort_desc.gif) |
|
Series Issue |
|
Edition |
|
ISSN |
0217-9792;1793-6578; |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
0.736 |
Times cited |
1 |
Open Access |
|
Notes |
|
Approved |
Most recent IF: 0.736; 2009 IF: 0.408 |
Call Number |
UA @ lucian @ c:irua:95673 |
Serial |
3362 |
Permanent link to this record |
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|
|
Author |
Ball, J.M.; Schryvers, D. |
Title |
The analysis of macrotwins in NiAl martensite |
Type |
A1 Journal article |
Year |
2003 |
Publication |
Journal de physique: 4
T2 – 10th International Conference on Martensitic Transformations, JUN 10-14, 2002, ESPOO, FINLAND |
Abbreviated Journal |
J Phys Iv |
Volume |
112 |
Issue |
Part 1 |
Pages |
159-162 |
Keywords |
A1 Journal article; Electron microscopy for materials research (EMAT) |
Abstract |
We present a theoretical study of macrotwins arising in cubic to tetragonal martensitic transformations. The results help to explain some features of such macrotwins observed in Ni65Al35. |
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
Les Ulis |
Editor |
|
Language |
|
Wos |
000186503200024 |
Publication Date |
2008-08-19 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
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Series Volume ![sorted by Series Volume (numeric) field, descending order (down)](img/sort_desc.gif) |
|
Series Issue |
|
Edition |
|
ISSN |
1155-4339; |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
|
Times cited |
11 |
Open Access |
|
Notes |
|
Approved |
Most recent IF: NA |
Call Number |
UA @ lucian @ c:irua:103275 |
Serial |
3569 |
Permanent link to this record |
|
|
|
Author |
Amelinckx, S.; Van Tendeloo, G.; van Landuyt, J. |
Title |
The study of high Tc-superconducting materials by electron microscopy and electron diffraction |
Type |
A1 Journal article |
Year |
1991 |
Publication |
Superconductor science and technology
T2 – SATELLITE CONF TO THE 19TH INTERNATIONAL CONF ON LOW TEMPERATURE PHYSICS : HIGH TEMPERATURE SUPERCONDUCTIVITY, AUG 13-15, 1990, QUEENS COLL, CAMBRIDGE, ENGLAND |
Abbreviated Journal |
Supercond Sci Tech |
Volume |
4 |
Issue |
s:[1] |
Pages |
S19-S34 |
Keywords |
A1 Journal article; Electron microscopy for materials research (EMAT) |
Abstract |
A survey is given of the application of different electron microscopic techniques to the study of structural features of high T(c)-superconducting materials. Emphasis is laid in this contribution on those structural aspects for the study of which electron microscopy has been essential or has contributed to a significant extent. |
Address |
|
Corporate Author |
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Thesis |
|
Publisher |
|
Place of Publication |
Bristol |
Editor |
|
Language |
|
Wos |
A1991FA42000004 |
Publication Date |
2002-08-25 |
Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume ![sorted by Series Volume (numeric) field, descending order (down)](img/sort_desc.gif) |
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Series Issue |
|
Edition |
|
ISSN |
0953-2048;1361-6668; |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
2.325 |
Times cited |
2 |
Open Access |
|
Notes |
|
Approved |
PHYSICS, APPLIED 47/145 Q2 # |
Call Number |
UA @ lucian @ c:irua:104503 |
Serial |
3596 |
Permanent link to this record |
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|
|
Author |
Callini, E.; Aguey-Zinsou, K.F.; Ahuja, R.; Ares, J.R.; Bals, S.; Biliškov, N.; Chakraborty, S.; Charalambopoulou, G.; Chaudhary, A.L.; Cuevas, F.; Dam, B.; de Jongh, P.; Dornheim, M.; Filinchuk, Y.; Grbović Novaković, J.; Hirscher, M.; Jensen, T.R.; Jensen, P.B.; Novaković, N.; Lai, Q.; Leardini, F.; Gattia, D.M.; Pasquini, L.; Steriotis, T.; Turner, S.; Vegge, T.; Züttel, A.; Montone, A. |
Title |
Nanostructured materials for solid-state hydrogen storage : a review of the achievement of COST Action MP1103 |
Type |
A1 Journal article |
Year |
2016 |
Publication |
International journal of hydrogen energy
T2 – E-MRS Fall Meeting / Symposium C on Hydrogen Storage in Solids -, Materials, Systems and Aplication Trends, SEP 15-18, 2015, Warsaw, POLAND |
Abbreviated Journal |
Int J Hydrogen Energ |
Volume |
41 |
Issue |
41 |
Pages |
14404-14428 |
Keywords |
A1 Journal article; Engineering sciences. Technology; Electron microscopy for materials research (EMAT) |
Abstract |
In the framework of the European Cooperation in Science and Technology (COST) Action MP1103 Nanostructured Materials for Solid-State Hydrogen Storage were synthesized, characterized and modeled. This Action dealt with the state of the art of energy storage and set up a competitive and coordinated network capable to define new and unexplored ways for Solid State Hydrogen Storage by innovative and interdisciplinary research within the European Research Area. An important number of new compounds have been synthesized: metal hydrides, complex hydrides, metal halide ammines and amidoboranes. Tuning the structure from bulk to thin film, nanoparticles and nanoconfined composites improved the hydrogen sorption properties and opened the perspective to new technological applications. Direct imaging of the hydrogenation reactions and in situ measurements under operando conditions have been carried out in these studies. Computational screening methods allowed the prediction of suitable compounds for hydrogen storage and the modeling of the hydrogen sorption reactions on mono-, bi-, and three-dimensional systems. This manuscript presents a review of the main achievements of this Action. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. |
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
Pergamon-elsevier science ltd |
Place of Publication |
Oxford |
Editor |
|
Language |
|
Wos |
000381950800051 |
Publication Date |
2016-05-08 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume ![sorted by Series Volume (numeric) field, descending order (down)](img/sort_desc.gif) |
|
Series Issue |
|
Edition |
|
ISSN |
0360-3199 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
3.582 |
Times cited |
89 |
Open Access |
Not_Open_Access |
Notes |
All the authors greatly thank the COST Action MP1103 for financial support. |
Approved |
Most recent IF: 3.582 |
Call Number |
UA @ lucian @ c:irua:135723 |
Serial |
4307 |
Permanent link to this record |
|
|
|
Author |
Verreck, D.; Verhulst, A.S.; Sorée, B.; Collaert, N.; Mocuta, A.; Thean, A.; Groeseneken, G. |
Title |
Non-uniform strain in lattice-mismatched heterostructure tunnel field-effect transistors |
Type |
P1 Proceeding |
Year |
2016 |
Publication |
Solid-State Device Research (ESSDERC), European Conference
T2 – 46th European Solid-State Device Research Conference (ESSDERC) / 42nd, European Solid-State Circuits Conference (ESSCIRC), SEP 12-15, 2016, Lausanne, SWITZERLAND |
Abbreviated Journal |
|
Volume |
|
Issue |
|
Pages |
412-415 |
Keywords |
P1 Proceeding; Condensed Matter Theory (CMT) |
Abstract |
Because of its localized impact on the band structure, non-uniform strain at the heterojunction between lattice-mismatched materials has the potential to significantly enlarge the design space for tunnel-field effect transistors (TFET). However, the impact of a complex strain profile on TFET performance is difficult to predict. We have therefore developed a 2D quantum mechanical transport formalism capable of simulating the effects of a general non-uniform strain. We demonstrate the formalism for the GaAsxSb(1-x)/InyGa(1-y) As system and show that a performance improvement over a lattice-matched reference is indeed possible, allowing for relaxed requirements on the source doping. We also point out that the added design parameter of mismatch is not free, but limited by the desired effective bandgap at the tunnel junction. |
Address |
|
Corporate Author |
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Thesis |
|
Publisher |
Ieee |
Place of Publication |
New york |
Editor |
|
Language |
|
Wos |
|
Publication Date |
|
Series Editor |
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Series Title |
|
Abbreviated Series Title |
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Series Volume ![sorted by Series Volume (numeric) field, descending order (down)](img/sort_desc.gif) |
|
Series Issue |
|
Edition |
|
ISSN |
978-1-5090-2969-3 |
ISBN |
|
Additional Links |
UA library record; WoS full record |
Impact Factor |
|
Times cited |
|
Open Access |
|
Notes |
|
Approved |
Most recent IF: NA |
Call Number |
UA @ lucian @ c:irua:138233 |
Serial |
4358 |
Permanent link to this record |
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|
Author |
Mehta, A.N.; Zhang, H.; Dabral, A.; Richard, O.; Favia, P.; Bender, H.; Delabie, A.; Caymax, M.; Houssa, M.; Pourtois, G.; Vandervorst, W. |
Title |
Structural characterization of SnS crystals formed by chemical vapour deposition |
Type |
A1 Journal article |
Year |
2017 |
Publication |
Journal of microscopy
T2 – 20th International Conference on Microscopy of Semiconducting Materials, (MSM), APR 09-13, 2017, Univ Oxford, Univ Oxford, Oxford, ENGLAND |
Abbreviated Journal |
J Microsc-Oxford |
Volume |
268 |
Issue |
3 |
Pages |
276-287 |
Keywords |
A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT) |
Abstract |
<script type='text/javascript'>document.write(unpmarked('The crystal and defect structure of SnS crystals grown using chemical vapour deposition for application in electronic devices are investigated. The structural analysis shows the presence of two distinct crystal morphologies, that is thin flakes with lateral sizes up to 50 m and nanometer scale thickness, and much thicker but smaller crystallites. Both show similar Raman response associated with SnS. The structural analysis with transmission electron microscopy shows that the flakes are single crystals of -SnS with [010] normal to the substrate. Parallel with the surface of the flakes, lamellae with varying thickness of a new SnS phase are observed. High-resolution transmission electron microscopy (TEM), scanning transmission electron microscopy (STEM), first-principles simulations (DFT) and nanobeam diffraction (NBD) techniques are employed to characterise this phase in detail. DFT results suggest that the phase is a strain stabilised \u0027 one grown epitaxially on the -SnS crystals. TEM analysis shows that the crystallites are also -SnS with generally the [010] direction orthogonal to the substrate. Contrary to the flakes the crystallites consist of two to four grains which are tilted up to 15 degrees relative to the substrate. The various grain boundary structures and twin relations are discussed. Under high-dose electron irradiation, the SnS structure is reduced and -Sn formed. It is shown that this damage only occurs for SnS in direct contact with SiO2. Lay description SnS is a p-type semiconductor, which has attracted significant interest for electronic devices due to its unique properties, low-toxicity and abundance of Sn in nature. Although in the past it has been most extensively studied as the absorber material in solar cells, it has recently garnered interest for application as a p-type two-dimensional semiconductor in nanoelectronic devices due to its anisotropic layered structure similar to the better known phosphorene. Tin sulphide can take the form of several phases and the electronic properties of the material depend strongly on its crystal structure. It is therefore crucial to study the crystal structure of the material in order to predict the electronic properties and gain insight into the growth mechanism. In this work, SnS crystals deposited using a chemical vapour deposition technique are investigated extensively for their crystal and defect structure using transmission electron microscopy (TEM) and related techniques. We find the presence of two distinct crystal morphologies, that is thin flakes with lateral sizes up to 50 m and nm scale thickness, and much thicker but smaller crystallites. The flakes are single crystals of -SnS and contain lamellae with varying thickness of a different phase which appear to be -SnS at first glance. High-resolution scanning transmission electron microscopy is used to characterise these lamellae where the annular bright field (ABF) mode better reveals the position of the sulphur columns. The sulphur columns in the lamellae are found to be shifted relative to the -SnS structure which indicates the formation of a new phase which is a distorted version of the phase which we tentatively refer to as \u0027-SnS. Simulations based on density functional theory (DFT) are used to model the interface and a similar shift of sulphur columns in the -SnS layer is observed which takes place as a result of strong interaction at the interface between the two phases resulting in strain transfer. Nanobeam electron diffraction (NBD) is used to map the lattice mismatch in the thickness of the flakes which reveals good in-plane matching and some expansion out-of-plane in the lamellae. Contrary to the flakes the crystallites are made solely of -SnS and consist of two to four grains which are tilted up to 15 degrees relative to the substrate. The various grain boundary structures and twin relations are discussed. At high electron doses, SnS is reduced to -Sn, however the damage occurs only for SnS in direct contact with SiO2.')); |
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
Wiley |
Place of Publication |
Hoboken |
Editor |
|
Language |
|
Wos |
000415900300009 |
Publication Date |
2017-09-28 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume ![sorted by Series Volume (numeric) field, descending order (down)](img/sort_desc.gif) |
|
Series Issue |
|
Edition |
|
ISSN |
0022-2720 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
1.692 |
Times cited |
2 |
Open Access |
Not_Open_Access |
Notes |
|
Approved |
Most recent IF: 1.692 |
Call Number |
UA @ lucian @ c:irua:147692 |
Serial |
4898 |
Permanent link to this record |
|
|
|
Author |
Nord, M.; Verbeeck, J. |
Title |
Towards Reproducible and Transparent Science of (Big) Electron Microscopy Data Using Version Control |
Type |
P1 Proceeding |
Year |
2019 |
Publication |
Microscopy and microanalysis
T2 – Microscopy & Microanalysis 2019, 4-8 August, 2019, Portland, Oregon |
Abbreviated Journal |
Microsc Microanal |
Volume |
25 |
Issue |
S2 |
Pages |
232-233 |
Keywords |
P1 Proceeding; Electron microscopy for materials research (EMAT) |
Abstract |
|
Address |
|
Corporate Author |
|
Thesis |
|
Publisher |
|
Place of Publication |
|
Editor |
|
Language |
|
Wos |
|
Publication Date |
2019-08-05 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume ![sorted by Series Volume (numeric) field, descending order (down)](img/sort_desc.gif) |
|
Series Issue |
|
Edition |
|
ISSN |
1431-9276 |
ISBN |
|
Additional Links |
UA library record |
Impact Factor |
1.891 |
Times cited |
|
Open Access |
|
Notes |
|
Approved |
Most recent IF: 1.891 |
Call Number |
EMAT @ emat @c:irua:164058 |
Serial |
5377 |
Permanent link to this record |
|
|
|
Author |
Admasu, W.F.; Van Passel, S.; Minale, A.S.; Tsegaye, E.A.; Azadi, H.; Nyssen, J. |
Title |
Take out the farmer: An economic assessment of land expropriation for urban expansion in Bahir Dar, Northwest Ethiopia |
Type |
A1 Journal article |
Year |
2019 |
Publication |
Land Use Policy |
Abbreviated Journal |
Land Use Policy |
Volume |
87 |
Issue |
87 |
Pages |
104038 |
Keywords |
A1 Journal article; Engineering Management (ENM) |
Abstract |
In Ethiopia, the demand for land for urbanisation is primarily met by converting rural land through expropriation. However, land expropriations are adversely affecting the previous land users by reducing the amount of production and their sources of income. In Bahir Dar, one of the fastest-growing cities in Ethiopia, approximately 300 landholdings are expropriated each year, on average, for urban expansion. This paper assesses the land expropriations to examine whether they offer economically appropriate compensation for the previous land users. Land expropriations for urbanisation between 2007/2008 and 2016/2017 were analysed based on data on land expropriation and its compensation payment obtained from the Bahir Dar City Land Administration and Management Office. Data were analysed using an exponential growth model and a stochastic budgeting technique in which Monte Carlo simulations are performed. Between 2007/2008 and 2016/2017, more than 1500 ha of land were included in the city's boundary through expropriation from 2900 landholders. The affected farmers received compensation that represents only 37 per cent of the value of current crop yields and its growth. The current compensation scheme ignores the impact of inflation on the prices of crops and assumes constant yields. It also excludes the value of crop residuals. We propose a workable discounted compensation framework that considers crop price and yield growths. This will make the compensation scheme more appropriate and make the affected farmers better off. |
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Corporate Author |
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Publisher |
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Place of Publication |
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Language |
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Wos |
000483419100026 |
Publication Date |
2019-06-15 |
Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume ![sorted by Series Volume (numeric) field, descending order (down)](img/sort_desc.gif) |
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Series Issue |
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Edition |
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ISSN |
0264-8377 |
ISBN |
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Additional Links |
UA library record; WoS full record |
Impact Factor |
3.089 |
Times cited |
1 |
Open Access |
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Notes |
; The authors acknowledge the Bahir Dar City Administration for sharing its compensation data, Bahir Dar Zuria Wereda Agriculture Office for sharing yield data, and the Industry and Trade Development Office for sharing crop price data. The Institutional University Cooperation with Bahir Dar University (BDU-IUC), funded by the Belgian authorities, through the Flemish Interuniversity Council University Development Cooperation, funded the research activities. We also thank the two anonymous reviewers and the editor of Land Use Policy for all constructive comments and suggestions. ; |
Approved |
Most recent IF: 3.089 |
Call Number |
UA @ admin @ c:irua:162837 |
Serial |
6261 |
Permanent link to this record |
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Author |
Shahraki, M.R.; Abedi-Sarvestani, A.; Seyedi, M.S.; Rafiaani Khachak, P.; Nieto-Garibay, A.; Van Passel, S.; Azadi, A. |
Title |
The perception by pastoralists of the factors influencing the appropriate distribution of livestock in the rangelands of north-east Iran |
Type |
A1 Journal article |
Year |
2015 |
Publication |
The Rangeland Journal |
Abbreviated Journal |
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Volume |
37 |
Issue |
2 |
Pages |
191-197 |
Keywords |
A1 Journal article; Economics; Engineering Management (ENM) |
Abstract |
The distribution of livestock grazing is a key principle of range management. This study examines pastoralists perceptions of the factors that affect the distribution of livestock in the rangelands of the Neqab region of the Kashmar County in north-east Iran. Data were collected from the pastoralists on their perceptions of the managerial, biological and physical factors that influences the distribution of livestock, using both qualitative and quantitative assessments. Results showed that, the perception of the majority of pastoralists was that the distribution of livestock was average or good in the study area. It was perceived that the experience of herders and the size of the rangeland were the main factors influencing the distribution of livestock. Regression analyses showed that it was perceived that managerial factors had a more important role than biological and physical factors in the distribution of livestock and the proper use of the rangelands in north-east Iran. |
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Wos |
000351863200007 |
Publication Date |
2015-02-18 |
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Additional Links |
UA library record; WoS full record |
Impact Factor |
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Times cited |
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Open Access |
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Notes |
; ; |
Approved |
Most recent IF: NA |
Call Number |
UA @ admin @ c:irua:129879 |
Serial |
6234 |
Permanent link to this record |
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Author |
Lizin, S.; Van Passel, S.; Schreurs, E. |
Title |
Farmers' perceived cost of land use restrictions : a simulated purchasing decision using discrete choice experiments |
Type |
A1 Journal article |
Year |
2015 |
Publication |
Land Use Policy |
Abbreviated Journal |
Land Use Policy |
Volume |
46 |
Issue |
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Pages |
115-124 |
Keywords |
A1 Journal article; Economics; Engineering Management (ENM) |
Abstract |
This paper reports on the findings from discrete choice experiments designed to estimate farmers perceived costs of land use restrictions, i.e. crop restrictions, additional fertilizing restrictions, and usage restrictions, as opposed to having no such restrictions. To this end, hypothetical land purchasing decisions were simulated based on the information about productivity, lot size, distance to other land, driving time to home, land use restrictions, and price. Farmers from the Campine area (Belgium) were invited to participate in the survey as the agricultural land in this region still faces the effects of historical heavy metal contamination resulting in crop restrictions. For identical pieces of land, we estimate the perceived cost, calculated as a change in the consumer surplus due to having a land use restriction, to be about 46,000 /ha for the crop restriction, 50,000 /ha for the usage restriction, and 70,000 /ha for the fertilizing restrictions. Assuming this cost to represent a perpetuity, then with a discount rate of 5% the yearly fixed costs respectively equal about 2300 /ha, 2500 /ha, and 3500 /ha. |
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Wos |
000356110500010 |
Publication Date |
2015-03-03 |
Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume ![sorted by Series Volume (numeric) field, descending order (down)](img/sort_desc.gif) |
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Series Issue |
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Edition |
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ISSN |
0264-8377 |
ISBN |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
3.089 |
Times cited |
12 |
Open Access |
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Notes |
; The authors would like to thank Boerenbond for their help as well as the farmers for their time in responding to the questionnaire. Additionally, Sebastien Lizin thanks the Research Foundation Flanders (FWO) for funding his postdoctoral fellowship, allowing him to revise the manuscript. The authors would also like to thank the anonymous reviewers for helping us to improve the quality of our work. ; |
Approved |
Most recent IF: 3.089; 2015 IF: 2.631 |
Call Number |
UA @ admin @ c:irua:129877 |
Serial |
6203 |
Permanent link to this record |
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Author |
Fitawok, M.B.; Derudder, B.; Minale, A.S.; Van Passel, S.; Adgo, E.; Nyssen, J. |
Title |
Modeling the Impact of Urbanization on Land-Use Change in Bahir Dar City, Ethiopia: An Integrated Cellular Automata–Markov Chain Approach |
Type |
A1 Journal Article |
Year |
2020 |
Publication |
Land |
Abbreviated Journal |
Land |
Volume |
9 |
Issue |
4 |
Pages |
115 |
Keywords |
A1 Journal Article; analytical hierarchy process; cellular automata; land-use change; Markov chain; urbanization; Engineering Management (ENM) ; |
Abstract |
The fast-paced urbanization of recent decades entails that many regions are facing seemingly uncontrolled land-use changes (LUCs) that go hand in hand with a range of environmental and socio-economic challenges. In this paper, we use an integrated cellular automata–Markov chain (CA–MC) model to analyze and predict the urban expansion of and its impact on LUC in the city of Bahir Dar, Ethiopia. To this end, the research marshals high-resolution Landsat images of 1991, 2002, 2011, and 2018. An analytical hierarchy process (AHP) method is then used to identify the biophysical and socioeconomic factors underlying the expansion in the research area. It is shown that, during the period of study, built-up areas are rapidly expanding in the face of an overall decline of the farmland and vegetation cover. Drawing on a model calibration for 2018, the research predicts the possible geographies of LUC in the Bahir Dar area for 2025, 2034, and 2045. It is predicted that the conversions of other land-use types into built-up areas will persist in the southern, southwestern, and northeastern areas of the sprawling city, which can mainly be traced back to the uneven geographies of road accessibility, proximity to the city center, and slope variables. We reflect on how our findings can be used to facilitate sustainable urban development and land-use policies in the Bahir Dar area. |
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Wos |
000533901100026 |
Publication Date |
2020-04-09 |
Series Editor |
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Abbreviated Series Title |
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Series Volume ![sorted by Series Volume (numeric) field, descending order (down)](img/sort_desc.gif) |
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Series Issue |
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Edition |
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ISSN |
2073-445X |
ISBN |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
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Times cited |
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Open Access |
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Notes |
The authors would like to thank the VLIR-UOS project for funding this research through Bahir Dar University—Institutional University Cooperation (BDU-IUC) program. |
Approved |
Most recent IF: NA |
Call Number |
ENM @ enm @c:irua:169600 |
Serial |
6381 |
Permanent link to this record |
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Author |
Chekol Zewdie, M.; Moretti, M.; Tenessa, D.B.; Ayele, Z.A.; Nyssen, J.; Tsegaye, E.A.; Minale, A.S.; Van Passel, S. |
Title |
Agricultural technical efficiency of smallholder farmers in Ethiopia : a stochastic frontier approach |
Type |
A1 Journal article |
Year |
2021 |
Publication |
Land |
Abbreviated Journal |
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Volume |
10 |
Issue |
3 |
Pages |
246 |
Keywords |
A1 Journal article; Engineering Management (ENM) |
Abstract |
In the past decade, to improve crop production and productivity, Ethiopia has embarked on an ambitious irrigation farming expansion program and has introduced new large- and small-scale irrigation initiatives. However, in Ethiopia, poverty remains a challenge, and crop productivity per unit area of land is very low. Literature on the technical efficiency (TE) of large-scale and small-scale irrigation user farmers as compared to the non-user farmers in Ethiopia is also limited. Investigating smallholder farmers' TE level and its principal determinants is very important to increase crop production and productivity and to improve smallholder farmers' livelihood and food security. Using 1026 household-level cross-section data, this study adopts a technology flexible stochastic frontier approach to examine agricultural TE of large-scale irrigation users, small-scale irrigation users and non-user farmers in Ethiopia. The results indicate that, due to poor extension services and old-style agronomic practices, the mean TE of farmers is very low (44.33%), implying that there is a wider room for increasing crop production in the study areas through increasing the TE of smallholder farmers without additional investment in novel agricultural technologies. Results also show that large-scale irrigation user farmers (21.05%) are less technically efficient than small-scale irrigation user farmers (60.29%). However, improving irrigation infrastructure shifts the frontier up and has a positive impact on smallholder farmers' output. |
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Wos |
000633846200001 |
Publication Date |
2021-03-01 |
Series Editor |
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Abbreviated Series Title |
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Series Volume ![sorted by Series Volume (numeric) field, descending order (down)](img/sort_desc.gif) |
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Series Issue |
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Edition |
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ISSN |
2073-445x |
ISBN |
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Additional Links |
UA library record; WoS full record |
Impact Factor |
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Times cited |
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Open Access |
OpenAccess |
Notes |
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Approved |
Most recent IF: NA |
Call Number |
UA @ admin @ c:irua:177647 |
Serial |
6913 |
Permanent link to this record |
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Author |
Admasu, W.F.; Van Passel, S.; Nyssen, J.; Minale, A.S.; Tsegaye, E.A. |
Title |
Eliciting farmers' preferences and willingness to pay for land use attributes in Northwest Ethiopia : a discrete choice experiment study |
Type |
A1 Journal article |
Year |
2021 |
Publication |
Land Use Policy |
Abbreviated Journal |
Land Use Policy |
Volume |
109 |
Issue |
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Pages |
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Keywords |
A1 Journal article; Economics; Engineering Management (ENM) |
Abstract |
This study investigates farmers' preferences and willingness to pay for cropland attributes in Bahir Dar, north-west Ethiopia. A choice experiment is used to elicit farmers' preferences between different land use attributes, including a monetary attribute. The study was conducted in the croplands that are threatened by land expro-priation for urban expansion. A survey was undertaken with 144 farmers in four rural kebeles surrounding the city (Addis Alem, Weramit, Wereb and Zenzelima). In the survey, respondents were provided with hypothetical land purchasing decisions, with three alternatives (i.e., two hypothetical parcels and an opt-out option). A choice experiment was undertaken to measure farmers' interest in different types of croplands, which varies with respect to irrigability, number of trees per ha, soil erosion resistance and water holding capacity of the cropland. Estimation of two mixed logit models was carried out. The estimation results show that, although the farmers did not show strong preferences for each attribute of the cropland, many farmers in the area showed interest in the proposed alternative croplands. Farmers show more interest for the land that is irrigable, gentle slope and with medium water holding capacity. The results also indicate that farmers assign highest marginal willingness to pay (MWTP) (79.01 ETB per square meter) for irrigated land, followed by medium water holding capacity with MWTP of 52.13 ETB per square meter. We believe that the results of this study would help land use policy and decision makers in the study area to consider the various attributes of cropland in land use planning, including land expropriation programs, which assures the sustainability of ecosystem services. |
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Place of Publication |
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Wos |
000702844000009 |
Publication Date |
2021-07-02 |
Series Editor |
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Abbreviated Series Title |
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Series Volume ![sorted by Series Volume (numeric) field, descending order (down)](img/sort_desc.gif) |
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Series Issue |
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Edition |
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ISSN |
0264-8377 |
ISBN |
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Additional Links |
UA library record; WoS full record |
Impact Factor |
3.089 |
Times cited |
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Open Access |
OpenAccess |
Notes |
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Approved |
Most recent IF: 3.089 |
Call Number |
UA @ admin @ c:irua:182489 |
Serial |
6921 |
Permanent link to this record |