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Author Lenaerts, J.; van Vaeck, L.; Gijbels, R.; Van Luppen, J. doi  openurl
  Title Comparison of mono- and polyatomic primary ions for the characterization of organic dye overlayers with static secondary ion mass spectrometry Type A1 Journal article
  Year 2004 Publication Rapid communications in mass spectrometry Abbreviated Journal Rapid Commun Mass Sp  
  Volume 18 Issue 3 Pages 257-264  
  Keywords A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)  
  Abstract (up) Organic carbocyanine dye coatings have been analyzed by time-of-flight static secondary ion mass spectrometry (TOF-S-SIMS) using three types of primary ions: Ga+ operating at 25 keV, and Xe+ and SF5+ both operating at 9 keV. Secondary ion yields obtained with these three primary ions have been compared for coatings with different layer thickness, varying from (sub)-monolayer to multilayers, on different substrates (Si, Ag and AgBr cubic microcrystals). For (sub)-monolayers deposited on Ag, Xe+ and SF5+ primary ions generate similar precursor ion intensities, but with Ga+ slightly lower precursor ion intensities were obtained. Thick coatings on Ag as well as mono- and multilayers on Si produce the highest precursor and fragment ion intensities with the polyatomic primary ion. The yield difference between SF5+ and Xe+ can reach a factor of 6. In comparison with Ga+, yield enhancements by up to a factor of 180 are observed with SF5+. For the mass spectrometric analysis of dye layers on AgBr microcrystals, SF5+ again proves to be the primary ion of choice. Copyright (C) 2004 John Wiley Sons, Ltd.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication London Editor  
  Language Wos 000188695200004 Publication Date 2004-01-28  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0951-4198;1097-0231; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 1.998 Times cited 5 Open Access  
  Notes Approved Most recent IF: 1.998; 2004 IF: 2.750  
  Call Number UA @ lucian @ c:irua:103759 Serial 432  
Permanent link to this record
 

 
Author Szafran, B.; Peeters, F.M. url  doi
openurl 
  Title Re-entrant pinning of Wigner molecules in a magnetic field due to a Coulomb impurity Type A1 Journal article
  Year 2004 Publication Europhysics letters Abbreviated Journal Epl-Europhys Lett  
  Volume 66 Issue 5 Pages 701-707  
  Keywords A1 Journal article; Condensed Matter Theory (CMT)  
  Abstract (up) Pinning of magnetic-field-induced Wigner molecules (WMs) confined in parabolic two-dimensional quantum dots by a charged defect is studied by an exact diagonalization approach. We found a re-entrant pinning of the WMs as a function of the magnetic field, a magnetic-field-induced re-orientation of the WMs and a qualitatively different pinning behaviour in the presence of a positive and negative Coulomb impurity.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Paris Editor  
  Language Wos 000223064900014 Publication Date 2004-05-27  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0295-5075;1286-4854; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 1.957 Times cited 11 Open Access  
  Notes Approved Most recent IF: 1.957; 2004 IF: 2.120  
  Call Number UA @ lucian @ c:irua:103226 Serial 2816  
Permanent link to this record
 

 
Author Verberck, B.; Nikolaev, A.V.; Michel, K.H. openurl 
  Title Orientational charge density waves and the metal-insulator transition in polymerized KC60 Type A1 Journal article
  Year 2004 Publication AIP conference proceedings Abbreviated Journal  
  Volume 723 Issue Pages 339-342  
  Keywords A1 Journal article; Condensed Matter Theory (CMT)  
  Abstract (up) Polymerized KC60 undergoes a structural phase transition accompanied by a metal-insulator transition around 50 K. To explain the structural aspect, a mechanism involving small orientational deviations of the valence electron density on every C-60 monomer orientational charge density waves (OCDWs) – has already been proposed earlier. In the present work, we address the metal-insulator transition using the OCDW concept. We are inspired by the analogy between a polymer chain exhibiting an OCDW and a linear atomic chain undergoing a static lattice deformation doubling the unit cell: such a deformation implies a band gap at the zone boundary, yielding an insulating state (Peierls instability). Within our view, a similar mechanism occurs in polymerized KC60; the OCDW plays the role of the lattice deformation. We present tight-binding band structure calculations and conclude that the metal-insulator transition can indeed be explained using OCDWs, but that the threedimensionality of the crystal plays an unexpected key role.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication New York Editor  
  Language Wos Publication Date 0000-00-00  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 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:94831 Serial 2513  
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Author Tadić, M.; Peeters, F.M. pdf  doi
openurl 
  Title Exciton states and oscillator strength in two vertically coupled InP/InGaP quantum discs Type A1 Journal article
  Year 2004 Publication Journal of physics : condensed matter Abbreviated Journal J Phys-Condens Mat  
  Volume 16 Issue 47 Pages 8633-8652  
  Keywords A1 Journal article; Condensed Matter Theory (CMT)  
  Abstract (up) Quantum mechanical coupling and strain in two vertically arranged InP/InGaP quantum dots is studied as a function of the size of the dots and the spacer thickness. The strain distribution is determined by the continuum mechanical model, while the single-band effective-mass equation and the multiband k (.) p theory are employed to compute the conduction and valence band energy levels, respectively. The exciton states are obtained from an exact diagonalization approach, and we also compute the oscillator strength for recombination. We found that the light holes are confined by strain to the spacer, which is the reason that the hole states exhibit coupling at much larger distances as compared with the electrons. At small d, the doublet structure of the hole energy levels arises as a consequence of the relocation of the light hole from the matrix to the regions located-outside the stack, close to the dot-matrix interface. When d varies, the exciton ground state exhibits numerous anticrossings with other states, which are related to the changing spatial localization of the hole as a function of d. The oscillator strength of the exciton recombination is strongly reduced in a certain range of spacer thicknesses, which effectively turns a bright exciton state into a dark one. This effect is associated with anticrossings between exciton energy levels.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication London Editor  
  Language Wos 000225796800016 Publication Date 2004-11-13  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0953-8984;1361-648X; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 2.649 Times cited 13 Open Access  
  Notes Approved Most recent IF: 2.649; 2004 IF: 2.049  
  Call Number UA @ lucian @ c:irua:99315 Serial 1116  
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Author Verbeeck, J.; Van Aert, S. pdf  doi
openurl 
  Title Model based quantification of EELS spectra Type A1 Journal article
  Year 2004 Publication Ultramicroscopy Abbreviated Journal Ultramicroscopy  
  Volume 101 Issue 2/4 Pages 207-224  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)  
  Abstract (up) Recent advances in model based quantification of electron energy loss spectra (EELS) are reported. The maximum likelihood method for the estimation of physical parameters describing an EELS spectrum, the validation of the model used in this estimation procedure, and the computation of the attainable precision, that is, the theoretical lower bound on the variance of these estimates, are discussed. Experimental examples on An and GaAs samples show the power of the maximum likelihood method and show that the theoretical prediction of the attainable precision can be closely approached even for spectra with overlapping edges where conventional EELS quantification fails. To provide end-users with a low threshold alternative to conventional quantification, a user friendly program was developed which is freely available under a GNU public license. (C) 2004 Elsevier B.V. All rights reserved.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Amsterdam Editor  
  Language Wos 000224046100016 Publication Date 2004-07-23  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0304-3991; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 2.843 Times cited 147 Open Access  
  Notes Fwo; Iuap P5/01 Approved Most recent IF: 2.843; 2004 IF: 2.215  
  Call Number UA @ lucian @ c:irua:57130UA @ admin @ c:irua:57130 Serial 2101  
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Author Tavernier, M.B.; Anisimovas, E.; Peeters, F.M. doi  openurl
  Title Electron-vortex interaction in a quantum dot Type A1 Journal article
  Year 2004 Publication International journal of modern physics: B: condensed matter physics, statistical physics, applied physics T2 – 16th International Conference on High Magnetic Fields in Semiconductor, Physics, AUG 02-06, 2004, Florida State Univ, NHMFL, Tallahassee, FL Abbreviated Journal Int J Mod Phys B  
  Volume 18 Issue 27-29 Pages 3633-3636  
  Keywords A1 Journal article; Condensed Matter Theory (CMT)  
  Abstract (up) Small numbers N < 5 of two-dimensional Coulomb-interacting electrons trapped in a parabolic potential placed in a perpendicular magnetic field are investigated. The reduced wave function of this system, which is obtained by fixing the positions of N-1 electrons, exhibits strong correlations between the electrons and the zeros. These zeros axe often called vortices. An exact-diagonalization scheme is used to obtain the wave functions and the results are compared with results obtained from the recently proposed rotating electron molecule (REM) theory. We find that the vortices gather around the fixed electrons and repel each other, which is to a much lesser extend so for the REM results.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Singapore Editor  
  Language Wos 000227140200035 Publication Date 2005-04-12  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0217-9792;1793-6578; ISBN Additional Links UA library record; WoS full record  
  Impact Factor 0.736 Times cited Open Access  
  Notes Approved Most recent IF: 0.736; 2004 IF: 0.361  
  Call Number UA @ lucian @ c:irua:102749 Serial 992  
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Author Cao, L.-H.; Yu, W.; Xu, H.; Zheng, C.-Y.; Liu, Z.-J.; Li, B.; Bogaerts, A. url  doi
openurl 
  Title Terahertz radiation from oscillating electrons in laser-induced wake fields Type A1 Journal article
  Year 2004 Publication Physical review : E : statistical physics, plasmas, fluids, and related interdisciplinary topics Abbreviated Journal Phys Rev E  
  Volume 70 Issue Pages 046408,1-7  
  Keywords A1 Journal article; Condensed Matter Theory (CMT); Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)  
  Abstract (up) Strong terahertz (1THz=1012Hz) radiation can be generated by the electron oscillation in fs-laser-induced wake fields. The interaction of a fs-laser pulse with a low-density plasma layer is studied in detail using numerical simulations. The spatial distribution and temporal evolution of terahertz electron current developed in a low-density plasma layer are presented, which enables us to calculate the intensity distribution of THz radiation. It is shown that laser and plasma parameters, such as laser intensity, pulse width, and background plasma density, are of key importance to the process. The optimum condition for wake-field excitation and terahertz emission is discussed upon the simulation results. Radiation peaked at 6.4 THz, with 900 fs duration and 9% bandwidth, can be generated in a plasma of density 5×1017cm−3. It turns out that the maximum radiation intensity scales as n03a04 when wake field is resonantly excited, where n0 and a0 are, respectively, the plasma density and the normalized field amplitude of the laser pulse.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Lancaster, Pa Editor  
  Language Wos 000225689600086 Publication Date 2004-10-14  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1539-3755;1550-2376; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 2.366 Times cited 9 Open Access  
  Notes Approved Most recent IF: 2.366; 2004 IF: NA  
  Call Number UA @ lucian @ c:irua:49818 Serial 3509  
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Author Kalitzova, M.; Vlakhov, E.; Marinov, Y.; Gesheva, K.; Ignatova, V.A.; Lebedev, O.; Muntele, C.; Gijbels, R. pdf  doi
openurl 
  Title Effect of high-frequency electromagnetic field on Te+-implanted (001) Si</tex> Type A1 Journal article
  Year 2004 Publication Vacuum: the international journal and abstracting service for vacuum science and technology Abbreviated Journal Vacuum  
  Volume 76 Issue 2-3 Pages 325-328  
  Keywords A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)  
  Abstract (up) The analysis of high-frequency electromagnetic field (HFEMF) effects on the microstructure and electrical properties of Te+ implanted (0 0 1) Si is reported. Cross-sectional high-resolution transmission electron microscopy (XHRTEM) demonstrates the formation of Te nanoclusters (NCs) embedded in the Si layer amorphized by implantation (a-Si) at fluences greater than or equal to 1 x 10(16) cm(-2). Post-implantation treatment with 0.45 MHz HFEMF leads to enlargement of Te NCs, their diffusion and accumulation at the a-Si surface and formation of laterally connected extended tellurium structures above the percolation threshold, appearing at an ion fluence of 1 x 10(17) cm(-2). AC electrical conductivity measurements show nearly four orders of magnitude decrease of impedance resistivity in this case, which is in good agreement with the results of our structural studies. The results obtained are discussed in terms of the two-phase isotropic spinodal structure. (C) 2004 Elsevier Ltd. All rights reserved.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Oxford Editor  
  Language Wos 000224890100048 Publication Date 2004-08-21  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0042-207X; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 1.53 Times cited 2 Open Access  
  Notes Approved Most recent IF: 1.53; 2004 IF: 0.902  
  Call Number UA @ lucian @ c:irua:95105 Serial 814  
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Author de Bleecker, K.; Bogaerts, A.; Goedheer, W. url  doi
openurl 
  Title Modeling of the formation and transport of nanoparticles in silane plasmas Type A1 Journal article
  Year 2004 Publication Physical review : E : statistical physics, plasmas, fluids, and related interdisciplinary topics Abbreviated Journal Phys Rev E  
  Volume 70 Issue Pages 056407,1-8  
  Keywords A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)  
  Abstract (up) The behavior of nanoparticles in a low-pressure silane discharge is studied with the use of a self-consistent one-dimensional fluid model. Nanoparticles of a given (prescribed) radius are formed in the discharge by the incorporation of a dust growth mechanism, i.e., by including a step in which large anions (typically Si12H−25), produced in successive chemical reactions of anions with silane molecules, are transformed into particles. Typically a few thousand anions are used for one nanoparticle. The resulting particle density and the charge on the particles are calculated with an iterative method. While the spatial distribution and the charge of the particles are influenced by the plasma, the presence of the nanoparticles will in turn influence the plasma properties. Several simulations with different particle radii are performed. The resulting density profile of the dust will greatly depend on the particle size, as it reacts to the shift of the balance of the different forces acting on the particles.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Lancaster, Pa Editor  
  Language Wos 000225970700092 Publication Date 2004-11-19  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1539-3755;1550-2376; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 2.366 Times cited 31 Open Access  
  Notes Approved Most recent IF: 2.366; 2004 IF: NA  
  Call Number UA @ lucian @ c:irua:49432 Serial 2132  
Permanent link to this record
 

 
Author Schalm, O.; Caluwé, D.; Wouters, H.; Janssens, K.; Verhaeghe, F.; Pieters, M. pdf  doi
openurl 
  Title Chemical composition and deterioration of glass excavated in the 15th-16th century fishermen town of Raversijde (Belgium) Type A1 Journal article
  Year 2004 Publication Spectrochimica acta: part A: molecular and biomolecular spectroscopy Abbreviated Journal Spectrochim Acta A  
  Volume 59 Issue Pages 1647-1656  
  Keywords A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)  
  Abstract (up) The chemical composition, as determined by electron probe X-ray microanalysis of a series of ca. 100 archaeological glass fragments, excavated at the Raversijde site (Belgium) is discussed. In the 15th-16th century, Raversijde was a flourishing fishermen town located on the shore of the North Sea, close to the city of Ostend. As a consequence of several battles that were fought in its vicinity, the site was abandoned in the 16th century and was not occupied since then. It is one of the rare archaeological sites in Europe that contains a significant amount of information on the daily life inside a small but affluent medieval community. A comparison of the chemical composition of fragments of vessels and window glass encountered in Raversijde to those found in urban centres in Belgium and to literature date on German and French archaeological finds shows that glass made with wood ash dominates. Usually, it concerns artifacts with a predominantly utilitarian use. A few objects made with sodic (i.e., Na-rich) glass were also encountered, likely to have been imported from Venice during the 15th century or in later periods from an urban centre such as Antwerp, where Facon-de-Venice glass manufacturing activities were established near the start of the 16th century. (C) 2004 Elsevier B.V. All rights reserved.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Wos 000224848000021 Publication Date 2004-10-13  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1386-1425 ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 2.536 Times cited 26 Open Access  
  Notes Approved Most recent IF: 2.536; 2004 IF: 1.188  
  Call Number UA @ admin @ c:irua:49011 Serial 5512  
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Author Rossell, M.D.; Abakumov, A.M.; Van Tendeloo, G.; Pardo, J.A.; Santiso, J. pdf  doi
openurl 
  Title Structure and microstructure of epitaxial Sr4Fe6O13-\delta films on SrTiO3 Type A1 Journal article
  Year 2004 Publication Chemistry and materials Abbreviated Journal Chem Mater  
  Volume 16 Issue Pages 2578-2584  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)  
  Abstract (up) The crystal structure and the microstructure of epitaxial Sr4Fe6O13+/-delta thin films grown on a single-crystal SrTiO3 substrate by PLD have been investigated. A combination of electron diffraction and high-resolution microscopy allows us to refine the structure and to identify an incommensurate modulation in the Sr4Fe6O13+/-delta films. The incommensurate structure (q = alphaa(m)* approximate to 0.39alpha(m)*, superspace group Xmmm(alpha00)0s0) can be interpreted as an oxygen-deficient modification in the Fe2O2.5 double layers. Moreover, it is shown that the experimentally determined a component of the modulation can be used consistently to estimate the local oxygen content in the Sr4Fe6O13+/-delta films. The compound composition can therefore be described as Sr4Fe6O12+2alpha and the value alpha = 0.39 corresponds to a Sr4Fe6O12.78 composition. The misfit stress along the Sr4Fe6O13+/-delta/SrTiO3 interface is accommodated via both elastic deformation and inelastic mechanisms (misfit dislocations and 90degrees rotation twins). The present results also suggest the existence of SrFeO3 perovskite in the Sr4Fe6O13+/-delta films.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Washington, D.C. Editor  
  Language Wos 000222252300011 Publication Date 2004-06-22  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0897-4756;1520-5002; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 9.466 Times cited 26 Open Access  
  Notes Approved Most recent IF: 9.466; 2004 IF: 4.103  
  Call Number UA @ lucian @ c:irua:54770 Serial 3286  
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Author Xu, Y.; Jia, D.-J.; Chen, Z.; Gao, Y.; Li, F.-S. doi  openurl
  Title The mode-deviation effect of trapped spinor bose gas beyond mean field theory Type A1 Journal article
  Year 2004 Publication International journal of modern physics: B: condensed matter physics, statistical physics, applied physics Abbreviated Journal Int J Mod Phys B  
  Volume 18 Issue 9 Pages 1339-1349  
  Keywords A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)  
  Abstract (up) The deviation effect of spinor mode from the single-mode for a spin-1 Bose gas of trapped atoms is studied beyond the mean field theory. Based on the effective Hamiltonian with nondegenerated level of the collective spin states, the splitting level of the system energy due to the deviation effect has been calculated. For the large condensates of (87)Rb and (23)Na with atom number N > 10(5), the splitting fraction of the energy, arising from the magnetization exhibited by the trapped Bose gas, is found to have a typical order of (10(-4) similar to 10(-8)), decreasing as N(-2) for (87)Rb and increasing as -N(-2) for 23 Na, respectively.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Singapore Editor  
  Language Wos 000222342400008 Publication Date 2004-06-18  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume 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; 2004 IF: 0.361  
  Call Number UA @ lucian @ c:irua:94805 Serial 2096  
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Author Goemans, M.; Clarysse, P.; Joannès, J.; de Clercq, P.; Lenaerts, S.; Matthys, K.; Boels, K. doi  openurl
  Title Catalytic Nox reduction with simultaneous dioxin and furan oxidation Type A1 Journal article
  Year 2004 Publication Chemosphere Abbreviated Journal Chemosphere  
  Volume 54 Issue 9 Pages 1357-1365  
  Keywords A1 Journal article  
  Abstract (up) The engineering, construction, performance and running costs of a catalytic flue gas cleaning component in the low dust area of a municipal waste incinerator is discussed. For this purpose, the case study of a Flemish incineration plant is presented, covering the history, the design procedure of the catalyst, relevant process data and the financial aspects. A reliable PCDD/F-destruction by means of oxidation by the catalyst to typical values of 0.001 ng TEQ/Nm3 has been demonstrated. At the same time, NOx− and CO-emissions are reduced by 90% and 20% to about 50 mg/Nm3 and below 10 mg/Nm3, respectively.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Wos 000188293500011 Publication Date 2003-12-02  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0045-6535; 1879-1298 ISBN Additional Links UA library record; WoS full record; WoS citing articles; WoS full record; WoS citing articles  
  Impact Factor 4.208 Times cited Open Access  
  Notes Approved Most recent IF: 4.208; 2004 IF: 2.359  
  Call Number UA @ admin @ c:irua:82011 Serial 5931  
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Author Holden, T.; Habermeier, H.-U.; Cristiani, G.; Golnik, A.; Boris, A.; Pimenov, A.; Humlicek, J.; Lebedev, O.I.; Van Tendeloo, G.; Keimer, B.; Bernhard, C. doi  openurl
  Title Proximity induced metal-insulator transition in YBa2Cu3O7/La2/3Ca1/3MnO3 superlattices Type A1 Journal article
  Year 2004 Publication Physical review : B : condensed matter and materials physics Abbreviated Journal Phys Rev B  
  Volume 69 Issue 6 Pages 064505,1-064505,7  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)  
  Abstract (up) The far-infrared dielectric response of superlattices (SL) composed of superconducting YBa2Cu3O7 (YBCO) and ferromagnetic La0.67Ca0.33MnO3 (LCMO) has been investigated by ellipsometry. A drastic decrease of the free-carrier response is observed which involves an unusually large length scale of d(crit)approximate to20 nm in YBCO and d(crit)approximate to10 nm in LCMO. A corresponding suppression of metallicity is not observed in SL's where LCMO is replaced by the paramagnetic metal LaNiO3. Our data suggest that either a long-range charge transfer from the YBCO to the LCMO layers or alternatively a strong coupling of the charge carriers to the different and competitive kind of magnetic correlations in the LCMO and YBCO layers is at the heart of the observed metal-insulator transition. The low free-carrier response observed in the far-infrared dielectric response of the magnetic superconductor RuSr2GdCu2O8 is possibly related to this effect.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Lancaster, Pa Editor  
  Language Wos 000220092100066 Publication Date 2004-02-21  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1098-0121;1550-235X; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 3.836 Times cited 101 Open Access  
  Notes Approved Most recent IF: 3.836; 2004 IF: 3.075  
  Call Number UA @ lucian @ c:irua:54743 Serial 2734  
Permanent link to this record
 

 
Author Filinov, A.V.; Peeters, F.M.; Riva, C.; Lozovik, Y.E.; Bonitz, M. doi  openurl
  Title Exciton molecules in quantum wells : influence of the well width fluctuations Type A1 Journal article
  Year 2004 Publication Few-body systems T2 – 3rd International Workshop on Dynamics and Structure of Critically, Stable Quantum Few-Body Systems, SEP 01-05, 2003, Trento, ITALY Abbreviated Journal Few-Body Syst  
  Volume 34 Issue 1-3 Pages 149-154  
  Keywords A1 Journal article; Condensed Matter Theory (CMT)  
  Abstract (up) The influence of the well width fluctuations on the dependence of the binding energy of excitonic complexes in quantum wells is studied by using the path-integral Monte-Carlo technique. The results are compared with available experimental data and a good agreement is found.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Wien Editor  
  Language Wos 000222009500025 Publication Date 2004-05-18  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0177-7963;1432-5411; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 0.877 Times cited 2 Open Access  
  Notes Approved Most recent IF: 0.877; 2004 IF: 1.948  
  Call Number UA @ lucian @ c:irua:103232 Serial 1113  
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Author Vincze, L.; Kukhlevsky, S.V.; Janssens, K. doi  openurl
  Title Simulation of poly-capillary lenses for coherent and partially coherent x-rays Type P1 Proceeding
  Year 2004 Publication Proceedings of the Society of Photo-optical Instrumentation Engineers T2 – Conference on Advances in Computational Methods for X-Ray and Neutron, Optics, AUG 03-05, 2004, Denver, CO Abbreviated Journal  
  Volume Issue Pages 81-85  
  Keywords P1 Proceeding; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)  
  Abstract (up) The intensity distributions of the coherent and partially coherent x-rays passed through a poly-capillary lens have been computed at the focal plane. The computations showed that at the appropriate experimental conditions the interference phenomenon does affect the intensity distribution. In the case of the coherent input radiation with the photon energy of 0.1 keV, the interference fringes were observed, while the non-coherent x-ray radiation produced no interference-like intensity distributions.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Wos 000225564800008 Publication Date 2004-11-05  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume 5536 Series Issue Edition  
  ISSN 0-8194-5474-5 ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor Times cited 6 Open Access  
  Notes Approved Most recent IF: NA  
  Call Number UA @ admin @ c:irua:103753 Serial 5832  
Permanent link to this record
 

 
Author Lukashin, A.V.; Eliseev, A.A.; Zhuravleva, N.G.; Vertegel, A.A.; Tretyakov, Y.D.; Lebedev, O.I.; Van Tendeloo, G. doi  openurl
  Title One-step synthesis of shelled PbS nanoparticles in a layered double hydroxide matrix Type A1 Journal article
  Year 2004 Publication Mendeleev communications Abbreviated Journal Mendeleev Commun  
  Volume Issue 4 Pages 174-176  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)  
  Abstract (up) The one-step preparation of capped PbS nanoparticles in an inorganic matrix via UV-induced decomposition of lead thiosulfate complexes intercalated into a hydrotalcite-type layered double hydroxide is reported.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Cambridge Editor  
  Language Wos 000224247100025 Publication Date 2004-09-09  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0959-9436; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 1.741 Times cited 9 Open Access  
  Notes Approved Most recent IF: 1.741; 2004 IF: 0.640  
  Call Number UA @ lucian @ c:irua:103735 Serial 2468  
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Author Salbu, B.; Janssens, K.; Lind, O.C.; Proost, K.; Gijsels, L.; Danesi, P.R. pdf  doi
openurl 
  Title Oxidation states of uranium in depleted uranium particles from Kuwait Type A1 Journal article
  Year 2004 Publication Journal of environmental radioactivity Abbreviated Journal J Environ Radioactiv  
  Volume 78 Issue 2 Pages 125-135  
  Keywords A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)  
  Abstract (up) The oxidation states of uranium in depleted uranium (DU) particles were determined by synchrotron radiation based mu-XANES, applied to individual particles isolated from selected samples collected at different sites in Kuwait. Based on scanning electron microscopy with X-ray microanalysis prior to mu-XANES, DU particles ranging from sub-microns to several hundred micrometers were observed. The.median particle size depended on sources and sampling sites; small-sized particles (median 13 mum) were identified in swipes taken from the inside of DU penetrators holes in tanks and in sandy soil collected below DU penetrators, while larger particles (median 44 mum) were associated with fire in a DU ammunition storage facility. Furthermore, the U-236/U-235 ratios obtained from accelerator mass spectrometry demonstrated that uranium in the DU particles originated from reprocessed fuel (about 10(-2) in DU from the ammunition facility, about 10(-3) for DU in swipes). Compared to well-defined standards, all investigated DU particles were oxidized. Uranium particles collected from swipes were characterized as UO2, U3O8 or a mixture of these oxidized forms, similar to that observed in DU affected areas in Kosovo. Uranium particles formed during fire in the DU ammunition facility were, however, present as oxidation state +5 and +6, with XANES spectra similar to solid uranyl standards. Environmental or health impact assessments for areas affected by DU munitions should therefore take into account the presence of respiratory UO2, U3O8 and even UO3 particles, their corresponding weathering rates and the subsequent mobilisation of U from oxidized DU particles. (C) 2004 Elsevier Ltd. All rights reserved.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Wos Publication Date  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0265-931x ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 2.31 Times cited Open Access  
  Notes Approved Most recent IF: 2.31; 2004 IF: 1.188  
  Call Number UA @ admin @ c:irua:49012 Serial 5765  
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Author Verberck, B.; Nikolaev, A.V.; Michel, K.H. doi  openurl
  Title Theoretical model for the structural phase transition and the metal-insulator transition in polymerized KC60 Type A1 Journal article
  Year 2004 Publication Fullerenes, nanotubes, and carbon nanostructures T2 – 6th Biennial International Workshop on Fullerenes and Atomic Clusters, JUN 30-JUL 04, 2003, St Petersburg, RUSSIA Abbreviated Journal Fuller Nanotub Car N  
  Volume 12 Issue 1-2 Pages 243-252  
  Keywords A1 Journal article; Engineering sciences. Technology; Condensed Matter Theory (CMT)  
  Abstract (up) The recently discovered structural phase transition in Polymerized KC60 at about 50K leads to a doubling of the unit cell volume and is accompanied by a metal-insulator transition. Here, we show that the ((a) over right arrow + (c) over right arrow, (b) over right arrow, (a) over right arrow – (c) over right arrow) superstructure results from orientational charge density waves along the polymer chains and correlated displacements of the K+ ions. The presented model can also account for the metal-insulator transition. The effect is specific for the space group Pmnn of KC60 and is absent in both Rb- and CsC60 (space group 12/m), in agreement with the present experimental knowledge of these compounds.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Wos 000220551600040 Publication Date 2004-03-15  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1536-383X;1536-4046; ISBN Additional Links UA library record; WoS full record  
  Impact Factor 1.35 Times cited Open Access  
  Notes Approved Most recent IF: 1.35; 2004 IF: 1.117  
  Call Number UA @ lucian @ c:irua:103259 Serial 3607  
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Author Vodolazov, D.Y.; Peeters, F.M. doi  openurl
  Title Stable and metastable states in a mesoscopic superconducting “eight” loop in presence of an external magnetic field Type A1 Journal article
  Year 2004 Publication Physica: C : superconductivity Abbreviated Journal Physica C  
  Volume 400 Issue 3-4 Pages 165-170  
  Keywords A1 Journal article; Condensed Matter Theory (CMT)  
  Abstract (up) The stable and metastable states of different configurations of a mesoscopic loop in the form of an eight is studied in the presence of a magnetic field. We find that for certain configurations the current is equal to zero for any value of the magnetic field leading to a magnetic field independent superconducting state. The state with fixed phase circulation becomes unstable when the momentum of the superconducting electrons reaches a critical value. At this moment the kinetic energy of the superconducting condensate becomes of the same order as the potential energy of the Cooper pairs and it leads to an instability. Numerical analysis of the time-dependent Ginzburg-Landau equations shows that the absolute value of the order parameter changes gradually at the transition from a state with one phase circulation to another although the vorticity change occurs abruptly. (C) 2003 Elsevier B.V. All rights reserved.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Amsterdam Editor  
  Language Wos 000187726300010 Publication Date 2003-09-17  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0921-4534; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 1.404 Times cited 5 Open Access  
  Notes Approved Most recent IF: 1.404; 2004 IF: 1.072  
  Call Number UA @ lucian @ c:irua:103757 Serial 3142  
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Author Nikolaev, A.V.; Michel, K.H. doi  openurl
  Title Ab initio approach to superexchange interactions in alkali doped fullerides AC60 Type P1 Proceeding
  Year 2004 Publication AIP conference proceedings T2 – 18th International Winterschool/Euroconference on Electronic Properties, of Novel Materials, MAR 06-JUN 13, 2004, Kirchberg, AUSTRIA Abbreviated Journal  
  Volume Issue Pages 393-396  
  Keywords P1 Proceeding; Condensed Matter Theory (CMT)  
  Abstract (up) The superexchange interactions between the fullerenes arise as a result of the electron transfer from the C-60 molecule to the alkali atom and back. We present a scheme, which is a configuration interaction approach based on the valence bond (Heitler-London) method. The effect of superexchange is described together with chemical bonding by constructing and solving a secular equation, rather than by using a perturbation treatment. We have considered 180degrees and 90degrees superexchange for the C-60 Cs-C-60 pathways. The calculations account for unusual electronic properties of polymer orthorhombic and quenched cubic phases of CsC60: two lines in nuclear magnetic resonance experiments, the development of a spin-singlet ground state and a decrease of magnetic susceptibility as T-->0.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication New York Editor  
  Language Wos 000224699400085 Publication Date 2004-11-11  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume 723 Series Issue Edition  
  ISSN 0-7354-0204-3 ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor Times cited Open Access  
  Notes Approved Most recent IF: NA  
  Call Number UA @ lucian @ c:irua:103752 Serial 27  
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Author Papp, G.; Peeters, F.M. pdf  doi
openurl 
  Title Giant magnetoresistance in a two-dimensional electron gas modulated by magnetic barriers Type A1 Journal article
  Year 2004 Publication Journal of physics : condensed matter Abbreviated Journal J Phys-Condens Mat  
  Volume 16 Issue 46 Pages 8275-8283  
  Keywords A1 Journal article; Condensed Matter Theory (CMT)  
  Abstract (up) The temperature-dependent giant magnetoresistance effect is investigated in a magnetically modulated two-dimensional electron gas, which can be realized by depositing two parallel ferromagnets on the top and bottom of a heterostructure. The effective potential for electrons arising for parallel magnetization allows the electrons to resonantly tunnel through the magnetic barriers, while this is excluded in the anti-parallel situation. Such a discrepancy results in a giant magnetoresistance ratio (MRR), which can be up to 10(31)%. The MRR shows a strong dependence on temperature, but our study indicates that for realistic parameters for a GaAs heterostructure the effect can be as high as 10(4)% at 4 K.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication London Editor  
  Language Wos 000225706000017 Publication Date 2004-11-06  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0953-8984;1361-648X; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 2.649 Times cited 69 Open Access  
  Notes Approved Most recent IF: 2.649; 2004 IF: 2.049  
  Call Number UA @ lucian @ c:irua:103718 Serial 1338  
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Author Lebedev, O.I.; Verbeeck, J.; Van Tendeloo, G.; Hayashi, N.; Terashima, T.; Takano, M. pdf  doi
openurl 
  Title Structure and microstructure of epitaxial SrnFenO3n-1 films Type A1 Journal article
  Year 2004 Publication Philosophical magazine Abbreviated Journal Philos Mag  
  Volume 84 Issue 36 Pages 3825-3841  
  Keywords A1 Journal article; Engineering sciences. Technology; Electron microscopy for materials research (EMAT)  
  Abstract (up) Thin films of SrFeO3-x (0 less than or equal to x less than or equal to 0.5) (SFO) grown on a (LaAlO3)(0.3) (SrAl0.5Ta0.5O3)(0.7) (LSAT) substrate by Pulsed laser deposition have been structurally investigated by electron diffraction and high resolution transmission electron microscopy for different post-deposition oxygen treatments. During the deposition and post-growth oxidation, the oxygen-reduced SFO films accept extra oxygen along the tetrahedral layers to minimize the elastic strain energy. The oxidation process stops at a concentration SFO2.875 and/or SFO2.75 because a zero misfit with the LSAT substrate is reached. A possible growth mechanism and phase transition mechanism are suggested. The non-oxidized films exhibit twin boundaries having a local perovskite-type structure with a nominal composition close to SFO3.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Wos 000225854700001 Publication Date 2005-01-28  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1478-6435;1478-6443; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 1.505 Times cited 4 Open Access  
  Notes reprint Approved Most recent IF: 1.505; 2004 IF: 1.167  
  Call Number UA @ lucian @ c:irua:54755 Serial 3287  
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Author Shanenko, A.A.; Ivanov, V.A. pdf  doi
openurl 
  Title Effects of confining interaction in meso-superconductors Type A1 Journal article
  Year 2004 Publication Physics letters : A Abbreviated Journal Phys Lett A  
  Volume 322 Issue 5-6 Pages 384-389  
  Keywords A1 Journal article; Condensed Matter Theory (CMT)  
  Abstract (up) This Letter presents a generalized Ginzburg-Landau equation for the superconducting order parameter which includes the terms resulting from the confining interaction associated with the specimen boundary. While the original Ginzburg-Landau theory had been developed for a bulk superconductor, this generalization is meant for study of a meso-superconductor. (C) 2004 Elsevier B.V. All rights reserved.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Amsterdam Editor  
  Language Wos 000220123600018 Publication Date 2004-02-05  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0375-9601; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 1.772 Times cited 1 Open Access  
  Notes Approved Most recent IF: 1.772; 2004 IF: 1.454  
  Call Number UA @ lucian @ c:irua:103244 Serial 859  
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Author Verbeeck, J.; van Dyck, D.; Van Tendeloo, G. pdf  doi
openurl 
  Title Energy-filtered transmission electron microscopy: an overview Type A1 Journal article
  Year 2004 Publication Spectrochimica acta: part B : atomic spectroscopy Abbreviated Journal Spectrochim Acta B  
  Volume 59 Issue 10/11 Pages 1529-1534  
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT); Vision lab  
  Abstract (up) This paper aims to give an overview of the technique of energy-filtered transmission electron microscopy (EFTEM). It explains the basic principles of the technique and points to the relevant literature for more detailed issues. Experimental examples are given to show the power of EFTEM to study the chemical composition of nanoscale samples in materials science. Advanced EFTEM applications like imaging spectroscopy and EFTEM tomography are briefly discussed. (C) 2004 Elsevier B.V. All rights reserved.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Oxford Editor  
  Language Wos 000224848000006 Publication Date 2004-10-13  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0584-8547; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 3.241 Times cited 37 Open Access  
  Notes Approved Most recent IF: 3.241; 2004 IF: 3.086  
  Call Number UA @ lucian @ c:irua:54869UA @ admin @ c:irua:54869 Serial 1038  
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Author Ignatova, V.A.; Conard, T.; Möller, W.; Vandervorst, W.; Gijbels, R. doi  openurl
  Title Depth profiling of ZrO2/SiO2/Si stacks : a TOF-SIMS and computer simulation study Type A1 Journal article
  Year 2004 Publication Applied surface science Abbreviated Journal Appl Surf Sci  
  Volume 231/232 Issue Pages 603-608  
  Keywords A1 Journal article; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)  
  Abstract (up) This study is dedicated to a better understanding of the processes occurring under ion bombardment of ultra-thin ZrO2/SiO2/Si gate dielectric stacks. Complex-shaped depth profiles were obtained by using TOF-SIMS with dual beam (500 eV for sputtering and 10 keV for analysis) Ar+ ions. The SIMS intensities of all the elements depend critically on the amount of oxygen at any moment of the sputtering process. Increased intensity is observed at the surface and at the ZrO2/SiO2 interface. A long tail of the Zr signal is present in the Si substrate, even after the second (SiO2/Si) interface, and a double bump structure in the Zr-90 and ZrO dimer is observed, which is more pronounced with increasing thickness of the interfacial SiO2 layer. Computer simulations using the dynamic Monte Carlo code (TRIDYN) are performed in order to distinguish the ion bombardment-induced effects from changes in the ionization degree. The original code is extended with simple models for the ionization mechanism and for the molecular yield during sputtering. Oxygen preferential sputtering at the surface and ballistic transport of Zr towards and through the interface are clearly demonstrated, but there is also evidence that due to recoil implantation oxygen gets piled-up near the ZrO2/SiO2 interface. (C) 2004 Elsevier B.V. All rights reserved.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Amsterdam Editor  
  Language Wos 000222427700118 Publication Date 2004-05-30  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0169-4332; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 3.387 Times cited 4 Open Access  
  Notes Approved Most recent IF: 3.387; 2004 IF: 1.497  
  Call Number UA @ lucian @ c:irua:51976 Serial 651  
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Author Wang, X.F.; Vasilopoulos, P.; Peeters, F.M. doi  openurl
  Title Influence of spin-orbit interaction on the magnetotransport of a periodically modulated two-dimensional electron gas Type A1 Journal article
  Year 2004 Publication International journal of modern physics: B: condensed matter physics, statistical physics, applied physics T2 – 16th International Conference on High Magnetic Fields in Semiconductor, Physics, AUG 02-06, 2004, Florida State Univ, NHMFL, Tallahassee, FL Abbreviated Journal Int J Mod Phys B  
  Volume 18 Issue 27-29 Pages 3653-3656  
  Keywords A1 Journal article; Condensed Matter Theory (CMT)  
  Abstract (up) Transport properties of a two-dimensional electron gas (2DEG) are studied in the presence of a normal magnetic field B, of a weak one-dimensional (1D) periodic potential modulation V(x) = V(0)cos(Kx), and of the Rashba spin-orbit interaction (SOI) of strength a. For V(x) = 0 the SOI mixes the up and down spin states of neighboring Landau levels into two, unequally spaced energy branches. For V(x) not equal 0 these levels broaden into bands and their bandwidths oscillate with B. The n-th level bandwidth of each series vanishes at different values of B. Relative to the ID-modulated 2DEG without SOI and one flat-band condition, there are two flat-band conditions that depend on a and the transport coefficients can change considerably. For weak a the Weiss oscillations show beating patterns while for strong a the Shubnikov-de Haas ones axe split in two.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Singapore Editor  
  Language Wos 000227140200040 Publication Date 2005-04-12  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0217-9792;1793-6578; ISBN Additional Links UA library record; WoS full record  
  Impact Factor 0.736 Times cited Open Access  
  Notes Approved Most recent IF: 0.736; 2004 IF: 0.361  
  Call Number UA @ lucian @ c:irua:103199 Serial 1633  
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Author Vasilopoulos, P.; Wang, X.F.; Peeters, F.M.; Chowdhury, S.; Long, A.R.; Davies, J.H. pdf  doi
openurl 
  Title Magneto resistance oscillations in a modulated 2DEG periodic in the ratio h/e to flux per unit cell Type A1 Journal article
  Year 2004 Publication Physica. E: Low-dimensional systems and nanostructures T2 – 15th International Conference on Electronic Properties of, Two-Dimensional Systems (EP2DS-15), JUL 14-18, 2003, Nara, JAPAN Abbreviated Journal Physica E  
  Volume 22 Issue 1-3 Pages 389-393  
  Keywords A1 Journal article; Engineering sciences. Technology; Condensed Matter Theory (CMT)  
  Abstract (up) Transport properties of the 2DEG are studied in the presence of a normal magnetic field B and of a weak, two-dimensional periodic potential modulation. A tight-binding treatment has shown that each Landau level splits into several subbands with exponentially small gaps between them. Assuming the latter are closed due to disorder gives analytical wave functions and simplifies the evaluation of the magnetoresistance tensor p(muv) The relative phase of the oscillations in p(xx) and p(yy) depends on the modulation strengths and periods. For short periods less than or equal to 100 nm, in addition to the Weiss oscillations, the collisional contribution to the conductivity and the corresponding resistivity contribution show prominent peaks when one flux quantum h/e passes through an integral number of unit cells in good agreement with experiments. For periods 300-400 nm long used in early experiments, these peaks occur at fields 10-25 times smaller than those of the Weiss oscillations and are not resolved. (C) 2003 Elsevier B.V. All rights reserved.  
  Address  
  Corporate Author Thesis  
  Publisher North-Holland Place of Publication Amsterdam Editor  
  Language Wos 000221140800094 Publication Date 2004-02-10  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1386-9477; ISBN Additional Links UA library record; WoS full record  
  Impact Factor 2.221 Times cited Open Access  
  Notes Approved Most recent IF: 2.221; 2004 IF: 0.898  
  Call Number UA @ lucian @ c:irua:104107 Serial 1911  
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Author Papp, G.; Peeters, F.M. doi  openurl
  Title Comment on “Tunable spin-injection and magnetoconductance in a novel 2DEG-ferromagnet structure” [phys. stat. sol. (b) 235, No. 1, 157-161 (2003)] Type A1 Journal article
  Year 2004 Publication Physica status solidi: B: basic research Abbreviated Journal Phys Status Solidi B  
  Volume 241 Issue 1 Pages 222-223  
  Keywords A1 Journal article; Condensed Matter Theory (CMT)  
  Abstract (up) We point out that the predicted strong spin-injection effect by Jiang and Jalil [phys. stat. sol. (b) 235, 157 (2003)] for a double magnetic barrier structure is based on a wrong calculation of the transmission probability. We corrected the result and found no significant spin-injection.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Berlin Editor  
  Language Wos 000188585200028 Publication Date 2003-12-29  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0370-1972;1521-3951; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 1.674 Times cited 11 Open Access  
  Notes Approved Most recent IF: 1.674; 2004 IF: 0.982  
  Call Number UA @ lucian @ c:irua:103257 Serial 413  
Permanent link to this record
 

 
Author Anisimovas, E.; Peeters, F.M. pdf  doi
openurl 
  Title Negative trions in coupled quantum dots Type A1 Journal article
  Year 2004 Publication Physica. E: Low-dimensional systems and nanostructures T2 – 15th International Conference on Electronic Properties of, Two-Dimensional Systems (EP2DS-15), JUL 14-18, 2003, Nara, JAPAN Abbreviated Journal Physica E  
  Volume 22 Issue 1-3 Pages 566-569  
  Keywords A1 Journal article; Engineering sciences. Technology; Condensed Matter Theory (CMT)  
  Abstract (up) We present an exact diagonalization study of negatively charged excitonic trions in two vertically coupled parabolic quantum dots. The electrons and the hole are confined to different dots. We obtain the energy spectra as a function of inter-dot separation and external magnetic field strength and identify different ground-state angular momentum transitions which are accompanied by abrupt charge redistributions in the dots. (C) 2003 Elsevier B.V. All rights reserved.  
  Address  
  Corporate Author Thesis  
  Publisher North-Holland Place of Publication Amsterdam Editor  
  Language Wos 000221140800137 Publication Date 2004-02-12  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1386-9477; ISBN Additional Links UA library record; WoS full record; WoS citing articles  
  Impact Factor 2.221 Times cited 1 Open Access  
  Notes Approved Most recent IF: 2.221; 2004 IF: 0.898  
  Call Number UA @ lucian @ c:irua:102771 Serial 2292  
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