| Records |
| Author |
Varykhalov, A.; Marchenko, D.; Sanchez-Barriga, J.; Scholz, M.R.; Verberck, B.; Trauzettel, B.; Wehling, T.O.; Carbone, C.; Rader, O. |
| Title |
Intact dirac cones at broken sublattice symmetry : photoemission study of graphene on Ni and Co |
Type |
A1 Journal article |
| Year |
2012 |
Publication |
Physical review X |
Abbreviated Journal  |
Phys Rev X |
| Volume |
2 |
Issue |
4 |
Pages |
041017-10 |
| Keywords |
A1 Journal article; Condensed Matter Theory (CMT) |
| Abstract |
The appearance of massless Dirac fermions in graphene requires two equivalent carbon sublattices of trigonal shape. While the generation of an effective mass and a band gap at the Dirac point remains an unresolved problem for freestanding extended graphene, it is well established by breaking translational symmetry by confinement and by breaking sublattice symmetry by interaction with a substrate. One of the strongest sublattice-symmetry-breaking interactions with predicted and measured band gaps ranging from 400 meV to more than 3 eV has been attributed to the interfaces of graphene with Ni and Co, which are also promising spin-filter interfaces. Here, we apply angle-resolved photoemission to epitaxial graphene on Ni (111) and Co(0001) to show the presence of intact Dirac cones 2.8 eV below the Fermi level. Our results challenge the common belief that the breaking of sublattice symmetry by a substrate and the opening of the band gap at the Dirac energy are in a straightforward relation. A simple effective model of a biased bilayer structure composed of graphene and a sublattice-symmetry-broken layer, corroborated by density-functional-theory calculations, demonstrates the general validity of our conclusions. |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
College Park, Md |
Editor |
|
| Language |
|
Wos |
000312703200001 |
Publication Date |
2012-12-22 |
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
2160-3308; |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
| Impact Factor |
12.789 |
Times cited |
86 |
Open Access |
|
| Notes |
; A. V. acknowledges helpful discussions with N. Sandler. This work was supported by SPP 1459 of the Deutsche Forschungsgemeinschaft. B. V. acknowledges support from the Research Foundation Flanders (FWO-Vlaanderen). B. T. and T. O. W. would like to thank the KITP at Santa Barbara for hospitality during the completion of this work. ; |
Approved |
Most recent IF: 12.789; 2012 IF: 6.711 |
| Call Number |
UA @ lucian @ c:irua:105964 |
Serial |
1677 |
| Permanent link to this record |
| |
|
| |
| Author |
Arsoski, V.; Čukarić, N.; Tadić, M.; Peeters, F.M. |
| Title |
Exciton states in a nanocup in the presence of a perpendicular magnetic field |
Type |
A1 Journal article |
| Year |
2012 |
Publication |
Physica scripta |
Abbreviated Journal |
Phys Scripta |
| Volume |
T149 |
Issue |
|
Pages |
014054-014054,5 |
| Keywords |
A1 Journal article; Condensed Matter Theory (CMT) |
| Abstract |
The exciton states in a strained (In,Ga)As/GaAs nanocup are theoretically determined. We explore how the nanocup bottom thickness (t) affects the magnetic field dependence of the exciton energy. Strain distribution is computed by the continuum mechanical model under the approximation of isotropic elasticity. The exciton wave functions are expanded into products of the electron and hole envelope functions. For small t, the exciton ground state has zero orbital momentum and exhibits small oscillations of the second derivative when the magnetic field increases. When t approaches the value of the cup height, however, the exciton levels exhibit angular momentum transitions, whose behavior is similar to that for type-II quantum dots. Small oscillations of the oscillator strength for exciton recombination are found when the magnetic field increases. An increase in thickness of the nanocup bottom has only a small effect on those oscillations for the optically active exciton states, but the exciton ground state becomes dark when the magnetic field increases. Hence, the results of our calculations show that an increase in thickness of the nanocup bottom transforms the exciton ground energy level dependence on magnetic field from the one characteristic of type-I rings to the one characteristic of type-II dots. |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
Stockholm |
Editor |
|
| Language |
|
Wos |
000303523500055 |
Publication Date |
2012-04-27 |
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
0031-8949;1402-4896; |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
| Impact Factor |
1.28 |
Times cited |
2 |
Open Access |
|
| Notes |
; This work was supported by the EU Network of Excellence SANDiE, the Ministry of Education and Science of Serbia, the Flemish Science Foundation (FWO-Vl) and the Belgian Science Policy (IAP). ; |
Approved |
Most recent IF: 1.28; 2012 IF: 1.032 |
| Call Number |
UA @ lucian @ c:irua:99135 |
Serial |
1117 |
| Permanent link to this record |
| |
|
| |
| Author |
Langerak, C.J.G.M.; Singleton, J.; Perenboom, J.A.A.; Devreese, J.T.; Barnes, D.J.; Nicholas, R.J.; Huant, S.; Harris, J.J.; Foxon, C.T.; Etienne, B.; Peeters, F.M. |
| Title |
Far-infrared magneto-optical studies of the polaron effect in low dimensional GaAs-(Ga,Al)As structures |
Type |
A1 Journal article |
| Year |
1991 |
Publication |
Physica scripta |
Abbreviated Journal |
Phys Scripta |
| Volume |
T39 |
Issue |
|
Pages |
308-313 |
| Keywords |
A1 Journal article; Condensed Matter Theory (CMT); Theory of quantum systems and complex systems |
| Abstract |
|
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
Stockholm |
Editor |
|
| Language |
|
Wos |
A1991GV57300048 |
Publication Date |
2007-01-26 |
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
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 |
6 |
Open Access |
|
| Notes |
|
Approved |
no |
| Call Number |
UA @ lucian @ c:irua:944 |
Serial |
1173 |
| Permanent link to this record |
| |
|
| |
| Author |
Chen, Z.; Kong, M.; Milošević, M.V.; Wu, Y. |
| Title |
Ground state configurations of two-dimensional plasma crystals under long-range attractive particle interaction force |
Type |
A1 Journal article |
| Year |
2003 |
Publication |
Physica scripta |
Abbreviated Journal |
Phys Scripta |
| Volume |
67 |
Issue |
5 |
Pages |
439 |
| Keywords |
A1 Journal article; Condensed Matter Theory (CMT); Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT) |
| Abstract |
|
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
Stockholm |
Editor |
|
| Language |
|
Wos |
000183154800014 |
Publication Date |
2003-07-31 |
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
0031-8949;1402-4896; |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
| Impact Factor |
1.28 |
Times cited |
4 |
Open Access |
|
| Notes |
|
Approved |
Most recent IF: 1.28; 2003 IF: 0.688 |
| Call Number |
UA @ lucian @ c:irua:57249 |
Serial |
1385 |
| Permanent link to this record |
| |
|
| |
| Author |
Grujić, M.; Zarenia, M.; Tadić, M.; Peeters, F.M. |
| Title |
Interband optical absorption in a circular graphene quantum dot |
Type |
A1 Journal article |
| Year |
2012 |
Publication |
Physica scripta |
Abbreviated Journal |
Phys Scripta |
| Volume |
T149 |
Issue |
|
Pages |
014056-014056,4 |
| Keywords |
A1 Journal article; Condensed Matter Theory (CMT) |
| Abstract |
We investigate the energy levels and optical properties of a circular graphene quantum dot in the presence of an external magnetic field perpendicular to the dot. Based on the Dirac-Weyl equation and assuming zero outward current at the edge of the dot we present the results for two different types of boundary conditions, i.e. infinite-mass (IMBC) and zigzag boundary conditions. We found that the dot with zigzag edges displays a zero-energy state in the energy spectra while this is not the case for the IMBCs. For both boundary conditions, the confinement becomes dominated by the magnetic field, where the energy levels converge to the Landau levels as the magnetic field increases. The effect of boundary conditions on the electron-and hole-energy states is found to affect the interband absorption spectra, where we found larger absorption in the case of IMBCs. The selection rules for interband optical transitions are determined and discussed for both boundary conditions. |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
Stockholm |
Editor |
|
| Language |
|
Wos |
000303523500057 |
Publication Date |
2012-04-27 |
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
0031-8949;1402-4896; |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
| Impact Factor |
1.28 |
Times cited |
5 |
Open Access |
|
| Notes |
; This work was supported by the EuroGraphene program of the ESF (project CONGRAN), the Ministry of Education and Science of Serbia, the Belgian Science Policy (IAP) and the Flemish Science Foundation (FWO-Vl). ; |
Approved |
Most recent IF: 1.28; 2012 IF: 1.032 |
| Call Number |
UA @ lucian @ c:irua:99136 |
Serial |
1688 |
| Permanent link to this record |
| |
|
| |
| Author |
Peeters, F.M.; Wu, X.G.; Devreese, J.T. |
| Title |
Magneto-phonon resonances in the resistance and the optical absorption spectrum of heterostructures |
Type |
A1 Journal article |
| Year |
1991 |
Publication |
Physica scripta |
Abbreviated Journal |
Phys Scripta |
| Volume |
T39 |
Issue |
|
Pages |
302-307 |
| Keywords |
A1 Journal article; Condensed Matter Theory (CMT); Theory of quantum systems and complex systems |
| Abstract |
|
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
Stockholm |
Editor |
|
| Language |
|
Wos |
A1991GV57300047 |
Publication Date |
2007-01-26 |
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
0031-8949;1402-4896; |
ISBN |
|
Additional Links |
UA library record; WoS full record |
| Impact Factor |
1.126 |
Times cited |
|
Open Access |
|
| Notes |
|
Approved |
no |
| Call Number |
UA @ lucian @ c:irua:940 |
Serial |
1907 |
| Permanent link to this record |
| |
|
| |
| Author |
Peeters, F.M.; Shi, J.M.; Devreese, J.T. |
| Title |
Magnetopolaron effect on shallow donors in bulk and in weakly and strongly coupled superlattices |
Type |
A1 Journal article |
| Year |
1994 |
Publication |
Physica scripta |
Abbreviated Journal |
Phys Scripta |
| Volume |
T55 |
Issue |
|
Pages |
57-64 |
| Keywords |
A1 Journal article; Condensed Matter Theory (CMT); Theory of quantum systems and complex systems |
| Abstract |
|
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
Stockholm |
Editor |
|
| Language |
|
Wos |
A1994PW67300010 |
Publication Date |
2007-01-09 |
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
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 |
7 |
Open Access |
|
| Notes |
|
Approved |
no |
| Call Number |
UA @ lucian @ c:irua:9281 |
Serial |
1924 |
| 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 |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
Royal Swedish Acad. Sciences |
Place of Publication |
Stockholm |
Editor |
|
| Language |
|
Wos |
A1991GV57300008 |
Publication Date |
2007-01-26 |
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
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 |
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 |
|
| 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 |
|
| Series Volume |
|
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 |
| |
|
| |
| Author |
Vasilopoulos, P.; Peeters, F.M. |
| Title |
Quantum magnetotransport of a two-dimensional electron gas subject to periodic electric and magnetic modulations |
Type |
A1 Journal article |
| Year |
1991 |
Publication |
Physica scripta |
Abbreviated Journal |
Phys Scripta |
| Volume |
T39 |
Issue |
|
Pages |
177-181 |
| Keywords |
A1 Journal article; Condensed Matter Theory (CMT) |
| Abstract |
|
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
Stockholm |
Editor |
|
| Language |
|
Wos |
A1991GV57300028 |
Publication Date |
0000-00-00 |
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
0031-8949 |
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:968 |
Serial |
2779 |
| Permanent link to this record |
| |
|
| |
| Author |
Arsoski, V.; Tadic, M.; Peeters, F.M. |
| Title |
Electric field tuning of the optical excitonic Aharonov-Bohm effect in nanodots grown by droplet epitaxy |
Type |
A1 Journal article |
| Year |
2013 |
Publication |
Physica scripta |
Abbreviated Journal |
Phys Scripta |
| Volume |
T157 |
Issue |
|
Pages |
014002 |
| Keywords |
A1 Journal article; Condensed Matter Theory (CMT) |
| Abstract |
Neutral excitons in axially symmetric GaAs nanodots embedded in an (Al, Ga) As matrix, which are formed by the droplet epitaxy technique, are investigated theoretically. An electric field perpendicular to the nanodot base results in both a vertical and an in-plane exciton polarization, which is beneficial for the appearance of the excitonic Aharonov-Bohm effect. In the range of low magnetic fields (below 5 Tesla), we found that the bright and dark exciton states can cross twice. This results in oscillations of the photoluminescence intensity with magnetic field, which are a striking manifestation of the optical excitonic Aharonov-Bohm effect. |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
Stockholm |
Editor |
|
| Language |
|
Wos |
000332504600003 |
Publication Date |
2013-11-15 |
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
0031-8949 |
ISBN |
|
Additional Links |
UA library record; WoS full record |
| Impact Factor |
1.28 |
Times cited |
|
Open Access |
|
| Notes |
; This work was supported by the EU Network of Excellence: SANDiE, the Ministry of Education and Science of Serbia, the Flemish Science Foundation (FWO-Vl) and the Belgian Science Policy (IAP). ; |
Approved |
Most recent IF: 1.28; 2013 IF: 1.296 |
| Call Number |
UA @ lucian @ c:irua:128901 |
Serial |
4594 |
| Permanent link to this record |
| |
|
| |
| Author |
Riva, C.; Peeters, F.M.; Varga, K. |
| Title |
Excitons and charged excitons in quantum wells |
Type |
A1 Journal article |
| Year |
2000 |
Publication |
Physica status solidi: A: applied research |
Abbreviated Journal |
Phys Status Solidi A |
| Volume |
178 |
Issue |
|
Pages |
513-517 |
| Keywords |
A1 Journal article; Condensed Matter Theory (CMT) |
| Abstract |
|
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
Berlin |
Editor |
|
| Language |
|
Wos |
000086440500089 |
Publication Date |
0000-00-00 |
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
0031-8965 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
| Impact Factor |
|
Times cited |
12 |
Open Access |
|
| Notes |
|
Approved |
Most recent IF: NA |
| Call Number |
UA @ lucian @ c:irua:28520 |
Serial |
1125 |
| Permanent link to this record |
| |
|
| |
| 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 |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
Berlin |
Editor |
|
| Language |
|
Wos |
000086440500089 |
Publication Date |
2002-09-11 |
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
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 |
| |
|
| |
| Author |
Janssens, K.L.; Partoens, B.; Peeters, F.M. |
| Title |
Magneto-exciton in single and coupled type II quantum dots |
Type |
A1 Journal article |
| Year |
2002 |
Publication |
Physica status solidi: A: applied research |
Abbreviated Journal |
Phys Status Solidi A |
| Volume |
190 |
Issue |
2 |
Pages |
571-576 |
| Keywords |
A1 Journal article; Condensed Matter Theory (CMT) |
| Abstract |
|
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
Berlin |
Editor |
|
| Language |
|
Wos |
000175623200048 |
Publication Date |
2002-08-25 |
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
0031-8965;1521-396X; |
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:62426 |
Serial |
1899 |
| Permanent link to this record |
| |
|
| |
| Author |
Vansweevelt, R.; Mortet, V.; D' Haen, J.; Ruttens, bart; van Haesendonck, C.; Partoens, B.; Peeters, F.M.; Wagner, P. |
| Title |
Study on the giant positive magnetoresistance and Hall effect in ultrathin graphite flakes |
Type |
A1 Journal article |
| Year |
2011 |
Publication |
Physica status solidi : A : applications and materials science |
Abbreviated Journal |
Phys Status Solidi A |
| Volume |
208 |
Issue |
6 |
Pages |
1252-1258 |
| Keywords |
A1 Journal article; Condensed Matter Theory (CMT) |
| Abstract |
In this paper, we report on the electronic transport properties of mesoscopic, ultrathin graphite flakes with a thickness corresponding to a stack of 150 graphene layers. The graphite flakes show an unexpectedly strong positive magnetoresistance (PMR) already at room temperature, which scales in good approximation with the square of the magnetic field. Furthermore, we show that the resistivity is unaffected by magnetic fields oriented in plane with the graphene layers. Hall effect measurements indicate that the charge carriers are p-type and their concentration increases with increasing temperature while the mobility is decreasing. The Hall voltage is non-linear in higher magnetic fields. Possible origins of the observed effects are discussed. Ball and stick model of the two topmost carbon layers of the hexagonal graphite structure. |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Wos |
000292945800008 |
Publication Date |
2011-02-24 |
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
1862-6300; |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
| Impact Factor |
1.775 |
Times cited |
8 |
Open Access |
|
| Notes |
; The authors gratefully acknowledge the support by FWO – Research Foundation Flanders (project G.0159.07 “Structural and electronic properties of biologically modified, graphene-based layers”), by the Federal Belgian Interuniversity Attraction Poles Programme BELSPO (project TAP VI P6/42 “Quantum effects in clusters and nanowires”) and by the Methusalem network “NANO – Antwerp-Hasselt,” funded by the Flemish Community. Technical assistance by Stoffel D. Janssens (magnet calibration and software development), Dr. Hong Yin (AFM-based thickness studies), Dr. Ronald Thoelen (data analysis), and Prof. Hans-Gerd Boyen (XPS spectroscopy) is greatly appreciated. ; |
Approved |
Most recent IF: 1.775; 2011 IF: 1.463 |
| Call Number |
UA @ lucian @ c:irua:91941 |
Serial |
3343 |
| Permanent link to this record |
| |
|
| |
| Author |
Riva, C.; Schweigert, V.A.; Peeters, F.M. |
| Title |
Angular momentum transitions and magnetic evaporation in off-center D- centers in quantum well |
Type |
A1 Journal article |
| Year |
1998 |
Publication |
Physica status solidi: B: basic research |
Abbreviated Journal |
Phys Status Solidi B |
| Volume |
210 |
Issue |
|
Pages |
599-603 |
| Keywords |
A1 Journal article; Condensed Matter Theory (CMT) |
| Abstract |
|
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
Berlin |
Editor |
|
| Language |
|
Wos |
000077607400058 |
Publication Date |
2002-09-10 |
| 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 |
1 |
Open Access |
|
| Notes |
|
Approved |
Most recent IF: 1.674; 1998 IF: 0.818 |
| Call Number |
UA @ lucian @ c:irua:24182 |
Serial |
117 |
| Permanent link to this record |
| |
|
| |
| Author |
Verberck, B.; Michel, K.H. |
| Title |
Anisotropic packing of C-70 molecules in carbon nanotubes |
Type |
A1 Journal article |
| Year |
2007 |
Publication |
Physica status solidi B-basic solid state physics |
Abbreviated Journal |
Phys Status Solidi B |
| Volume |
244 |
Issue |
11 |
Pages |
4279-4282 |
| Keywords |
A1 Journal article; Condensed Matter Theory (CMT) |
| Abstract |
|
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Wos |
000251355800092 |
Publication Date |
2007-10-19 |
| 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 |
| Impact Factor |
1.674 |
Times cited |
|
Open Access |
|
| Notes |
|
Approved |
Most recent IF: 1.674; 2007 IF: 1.071 |
| Call Number |
UA @ lucian @ c:irua:67350 |
Serial |
128 |
| Permanent link to this record |
| |
|
| |
| Author |
Riva, C.; Varga, K.; Schweigert, V.A.; Peeters, F.M. |
| Title |
Binding energy and structure of localized biexcitons in quantum wells |
Type |
A1 Journal article |
| Year |
1998 |
Publication |
Physica status solidi: B: basic research |
Abbreviated Journal |
Phys Status Solidi B |
| Volume |
210 |
Issue |
|
Pages |
689-692 |
| Keywords |
A1 Journal article; Condensed Matter Theory (CMT) |
| Abstract |
|
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
Berlin |
Editor |
|
| Language |
|
Wos |
000077607400073 |
Publication Date |
2002-09-10 |
| 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 |
12 |
Open Access |
|
| Notes |
|
Approved |
Most recent IF: 1.674; 1998 IF: 0.818 |
| Call Number |
UA @ lucian @ c:irua:24181 |
Serial |
238 |
| Permanent link to this record |
| |
|
| |
| Author |
Pokatilov, E.P.; Croitoru, M.D.; Fomin, V.M.; Devreese, J.T. |
| Title |
Bipolaron stability in an ellipsoidal potential well |
Type |
A1 Journal article |
| Year |
2003 |
Publication |
Physica status solidi: B: basic research |
Abbreviated Journal |
Phys Status Solidi B |
| Volume |
237 |
Issue |
|
Pages |
244-251 |
| Keywords |
A1 Journal article; Theory of quantum systems and complex systems; Condensed Matter Theory (CMT); Electron microscopy for materials research (EMAT) |
| Abstract |
|
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
Berlin |
Editor |
|
| Language |
|
Wos |
000182801800022 |
Publication Date |
2003-04-24 |
| 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 |
7 |
Open Access |
|
| Notes |
|
Approved |
Most recent IF: 1.674; 2003 IF: 0.987 |
| Call Number |
UA @ lucian @ c:irua:44283 |
Serial |
243 |
| Permanent link to this record |
| |
|
| |
| Author |
Brosens, F.; Magnus, W. |
| Title |
Carrier transport in nanodevices: revisiting the Boltzmann and Wigner distribution functions |
Type |
A1 Journal article |
| Year |
2009 |
Publication |
Physica status solidi: B: basic research |
Abbreviated Journal |
Phys Status Solidi B |
| Volume |
246 |
Issue |
7 |
Pages |
1656-1661 |
| Keywords |
A1 Journal article; Condensed Matter Theory (CMT); Theory of quantum systems and complex systems |
| Abstract |
In principle, transport of charged carriers in nanometer sized solid-state devices can be fully characterized once the non-equilibrium distribution function describing the carrier ensemble is known. In this light, we have revisited the Boltzmann and the Wigner distribution functions and the framework in which they emerge from the classical respectively quantum mechanical Liouville equation. We have assessed the method of the characteristic curves as a potential workhorse to solve the time dependent Boltzmann equation for carriers propagating through spatially non-uniform systems, such as nanodevices. In order to validate the proposed solution strategy, we numerically solve the Boltzmann equation for a one-dimensional conductor mimicking the basic features of a biased low-dimensional transistor operating in the on-state. Finally, we propose a computational scheme capable of extending the benefits of the above mentioned solution strategy when it comes to solve the Wigner-Liouville equation. |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
Berlin |
Editor |
|
| Language |
|
Wos |
000268659100033 |
Publication Date |
2009-04-22 |
| 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 |
8 |
Open Access |
|
| Notes |
|
Approved |
Most recent IF: 1.674; 2009 IF: 1.150 |
| Call Number |
UA @ lucian @ c:irua:77953 |
Serial |
284 |
| Permanent link to this record |
| |
|
| |
| Author |
Krugel, A.; Axt, V.M.; Kuhn, T.; Vagov, A.; Peeters, F.M. |
| Title |
Coherent nonlinear optical response of excitons and biexcitons in quantum dots coupled to phonons |
Type |
A1 Journal article |
| Year |
2006 |
Publication |
Physica status solidi B – basic solid state physics |
Abbreviated Journal |
Phys Status Solidi B |
| Volume |
243 |
Issue |
10 |
Pages |
2241-2246 |
| Keywords |
A1 Journal article; Condensed Matter Theory (CMT) |
| Abstract |
|
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Wos |
000239932300006 |
Publication Date |
2006-08-15 |
| 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 |
1 |
Open Access |
|
| Notes |
|
Approved |
Most recent IF: 1.674; 2006 IF: 0.967 |
| Call Number |
UA @ lucian @ c:irua:60892 |
Serial |
380 |
| Permanent link to this record |
| |
|
| |
| Author |
Papp, G.; Peeters, F.M. |
| 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 |
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 |
Riva, C.; Peeters, F.M.; Varga, K.; Schweigert, V.A. |
| Title |
Correlation energy and configuration of biexcitons in quantum wells |
Type |
A1 Journal article |
| Year |
2002 |
Publication |
Physica status solidi: B: basic research |
Abbreviated Journal |
Phys Status Solidi B |
| Volume |
234 |
Issue |
1 |
Pages |
50-57 |
| Keywords |
A1 Journal article; Condensed Matter Theory (CMT) |
| Abstract |
A calculation of the energy of a biexciton in a GaAs/AlGaAs quantum wen is presented. We compare the results obtained using two different techniques. We discuss the dependence of the biexciton correlation energy and binding energy on the electron/hole mass ratio and on the well width. The structure of the biexciton is also investigated. |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
Berlin |
Editor |
|
| Language |
|
Wos |
000179600900009 |
Publication Date |
2002-11-07 |
| 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 |
6 |
Open Access |
|
| Notes |
|
Approved |
Most recent IF: 1.674; 2002 IF: 0.930 |
| Call Number |
UA @ lucian @ c:irua:99604 |
Serial |
526 |
| Permanent link to this record |
| |
|
| |
| Author |
Karczewski, G.; Wojtowicz, T.; Wang, Y.-J.; Wu, X.; Peeters, F.M. |
| Title |
Electron effective mass and resonant polaron effect in CdTe/CdMgTe quantum wells |
Type |
A1 Journal article |
| Year |
2002 |
Publication |
Physica status solidi: B: basic research
T2 – 10th International Conference on II-VI Compounds, SEP 09-14, 2001, BREMEN, GERMANY |
Abbreviated Journal |
Phys Status Solidi B |
| Volume |
229 |
Issue |
1 |
Pages |
597-600 |
| Keywords |
A1 Journal article; Condensed Matter Theory (CMT) |
| Abstract |
Cyclotron resonance in CdTe/CdMgTe quantum wells (QWs) was studied. Due to the polaron effect the zero-field effective mass is strongly influenced by the QW width. The experimental data have been described theoretically by taking into account electron-phonon coupling and the nonparabolicity of the conduction band. The subband structure was calculated self-consistently. The best fit was obtained for an electron-phonon coupling constant alpha = 0.3 and bare electron mass of m(b) = 0.092m(0). |
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
Berlin |
Editor |
|
| Language |
|
Wos |
000173806600118 |
Publication Date |
2002-08-25 |
| 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 |
10 |
Open Access |
|
| Notes |
|
Approved |
Most recent IF: 1.674; 2002 IF: 0.930 |
| Call Number |
UA @ lucian @ c:irua:102838 |
Serial |
925 |
| Permanent link to this record |
| |
|
| |
| Author |
Vagov, A.; Croitoru, M.D.; Axt, V.M.; Kuhn, T.; Peeters, F.M. |
| Title |
High pulse area undamping of Rabi oscillations in quantum dots coupled to phonons |
Type |
A1 Journal article |
| Year |
2006 |
Publication |
Physica status solidi B – Basic solid state physics |
Abbreviated Journal |
Phys Status Solidi B |
| Volume |
243 |
Issue |
10 |
Pages |
2233-2240 |
| Keywords |
A1 Journal article; Condensed Matter Theory (CMT); Electron microscopy for materials research (EMAT) |
| Abstract |
|
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
|
Editor |
|
| Language |
|
Wos |
000239932300005 |
Publication Date |
2006-07-27 |
| 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 |
16 |
Open Access |
|
| Notes |
|
Approved |
Most recent IF: 1.674; 2006 IF: 0.967 |
| Call Number |
UA @ lucian @ c:irua:60891 |
Serial |
1440 |
| Permanent link to this record |
| |
|
| |
| Author |
Janssens, K.L.; Peeters, F.M.; Schweigert, V.A. |
| Title |
Magnetic field dependence of the properties of excitons confined in a quantum disk |
Type |
A1 Journal article |
| Year |
2001 |
Publication |
Physica status solidi: B: basic research |
Abbreviated Journal |
Phys Status Solidi B |
| Volume |
224 |
Issue |
|
Pages |
763-768 |
| Keywords |
A1 Journal article; Condensed Matter Theory (CMT) |
| Abstract |
|
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
Berlin |
Editor |
|
| Language |
|
Wos |
000168432100030 |
Publication Date |
2004-11-23 |
| 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 |
1 |
Open Access |
|
| Notes |
|
Approved |
Most recent IF: 1.674; 2001 IF: 0.873 |
| Call Number |
UA @ lucian @ c:irua:37311 |
Serial |
1872 |
| Permanent link to this record |
| |
|
| |
| Author |
van Rossum, M.; Schoenmaker, W.; Magnus, W.; de Meyer, K.; Croitoru, M.D.; Gladilin, V.N.; Fomin, V.M.; Devreese, J.T. |
| Title |
Moore's law: new playground for quantum physics |
Type |
A1 Journal article |
| Year |
2003 |
Publication |
Physica status solidi: B: basic research |
Abbreviated Journal |
Phys Status Solidi B |
| Volume |
237 |
Issue |
|
Pages |
426-432 |
| Keywords |
A1 Journal article; Theory of quantum systems and complex systems; Condensed Matter Theory (CMT); Electron microscopy for materials research (EMAT) |
| Abstract |
|
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
Berlin |
Editor |
|
| Language |
|
Wos |
000182801800041 |
Publication Date |
2003-04-24 |
| 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 |
2 |
Open Access |
|
| Notes |
|
Approved |
Most recent IF: 1.674; 2003 IF: 0.987 |
| Call Number |
UA @ lucian @ c:irua:44284 |
Serial |
2202 |
| Permanent link to this record |
| |
|
| |
| Author |
Xiao, Y.M.; Xu, W.; Zhang, Y.Y.; Peeters, F.M. |
| Title |
Optoelectronic properties of ABC-stacked trilayer graphene |
Type |
A1 Journal article |
| Year |
2013 |
Publication |
Physica status solidi: B: basic research |
Abbreviated Journal |
Phys Status Solidi B |
| Volume |
250 |
Issue |
1 |
Pages |
86-94 |
| Keywords |
A1 Journal article; Condensed Matter Theory (CMT) |
| Abstract |
We present a theoretical study on the optoelectronic properties of ABC-stacked trilayer graphene (TLG). The optical conductance and light transmittance are evaluated through using the energy-balance equation derived from the Boltzmann equation for an air/graphene/dielectric-wafer system in the presence of linearly polarized radiation field. The results obtained from two band structure models are examined and compared. For short wavelength radiation, the universal optical conductance sigma(0) = 3e(2)/(4h) can be obtained. Importantly, there exists an optical absorption window in the radiation wavelength range 10-200 mu m, which is induced by different transition energies required for inter- and intra-band optical absorption channels. As a result, we find that the position and width of this window depend sensitively on temperature and carrier density of the system, especially the lower frequency edge. There is a small characteristic absorption peak at about 82 mu m where the largest interband transition states exist in the ABC-stacked TLG model, in contrast to the relatively smooth curves in a simplified model. These theoretical results indicate that TLG has some interesting and important physical properties which can be utilized to realize infrared or THz optoelectronic devices. |
| Address |
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| Corporate Author |
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Thesis |
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| Publisher |
|
Place of Publication |
Berlin |
Editor |
|
| Language |
|
Wos |
000313347500011 |
Publication Date |
2012-08-08 |
| Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
0370-1972; |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
| Impact Factor |
1.674 |
Times cited |
6 |
Open Access |
|
| Notes |
; This work was supported by the National Natural Science Foundation of China (grant no. 10974206), Department of Science and Technology of Yunnan Province, and by the Chinese Academy of Sciences. One of us (F.M.P.) was a Specially Appointed Foreign Professor of the Chinese Academy of Sciences. ; |
Approved |
Most recent IF: 1.674; 2013 IF: 1.605 |
| Call Number |
UA @ lucian @ c:irua:110109 |
Serial |
2495 |
| Permanent link to this record |
| |
|
| |
| Author |
Riva, C.; Peeters, F.M.; Varga, K. |
| Title |
Positive and negative charged excitons in a semiconductor quantum well |
Type |
A1 Journal article |
| Year |
2001 |
Publication |
Physica status solidi: B: basic research |
Abbreviated Journal |
Phys Status Solidi B |
| Volume |
227 |
Issue |
|
Pages |
397-404 |
| Keywords |
A1 Journal article; Condensed Matter Theory (CMT) |
| Abstract |
|
| Address |
|
| Corporate Author |
|
Thesis |
|
| Publisher |
|
Place of Publication |
Berlin |
Editor |
|
| Language |
|
Wos |
000171986600015 |
Publication Date |
2002-08-25 |
| 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 |
5 |
Open Access |
|
| Notes |
|
Approved |
Most recent IF: 1.674; 2001 IF: 0.873 |
| Call Number |
UA @ lucian @ c:irua:37310 |
Serial |
2677 |
| Permanent link to this record |
| |
|
| |
| Author |
Michel, K.H.; Verberck, B. |
| Title |
Rigid-plane phonons in layered crystals |
Type |
A1 Journal article |
| Year |
2012 |
Publication |
Physica status solidi: B: basic research |
Abbreviated Journal |
Phys Status Solidi B |
| Volume |
249 |
Issue |
12 |
Pages |
2604-2607 |
| Keywords |
A1 Journal article; Condensed Matter Theory (CMT) |
| Abstract |
The determination of the layer number ${\cal N}$ in nanoscale thin layered crystals is a challenging problem of technological relevance. In addition to innovative experimental techniques, a thorough knowledge of the underlying lattice dynamics is required. Starting from phenomenological atomic interaction potentials we have carried out an analytical study of the low-frequency optical phonon dispersions in layered crystals. At the gamma point of the two-dimensional Brillouin zone the optical phonon frequencies correspond to rigid-plane shearing and compression modes. We have investigated graphene multilayers (GML) and hexagonal boron-nitride multilayers (BNML). The frequencies show a characteristic dependence on ${\cal N}$. The results which are represented in the form of fan diagrams are very similar for both materials. Due to charge neutrality within layers Coulomb forces play no role, only van der Waals forces between nearest neighbor layers are relevant. The theoretical results agree with recent low-frequency Raman results on rigid-layer modes [Tan et al., Nature Mater. 11, 294 (2012)] in GML and double-resonant Raman scattering data on rigid-layer compression modes [Herziger et al., Phys. Rev. B 85, 235447 (2012)] in GML. (C) 2012 WILEY-VCH Verlag GmbH Co. KGaA, Weinheim |
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Place of Publication |
Berlin |
Editor |
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Wos |
000312215300072 |
Publication Date |
2012-11-19 |
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Series Title |
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Edition |
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| ISSN |
0370-1972; |
ISBN |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
| Impact Factor |
1.674 |
Times cited |
1 |
Open Access |
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| Notes |
; This work has been supported by the Flemish Science Foundation (FWO-Vl) and the Bijzonder Onderzoeksfonds, Universiteit Antwerpen (BOF-UA). ; |
Approved |
Most recent IF: 1.674; 2012 IF: 1.489 |
| Call Number |
UA @ lucian @ c:irua:105992 |
Serial |
2907 |
| Permanent link to this record |
