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Author Barbier, M.; Vasilopoulos, P.; Peeters, F.M.; Pereira, J.M.
Title Band structure, density of states, and transmission in graphene bilayer superlattices Type A1 Journal article
Year 2009 Publication AIP conference proceedings Abbreviated Journal
Volume 1199 Issue Pages 547-548
Keywords A1 Journal article; Condensed Matter Theory (CMT)
Abstract The energy spectrum and density of states of graphene bilayer superlattices (SLs) are evaluated. We take into account doping and/or gating of the layers as well as tunnel coupling between them. In addition, we evaluate the transmission through such SLs and through single or double barriers. The transmission exhibits a strong dependence on the direction of the incident wave vector.
Address
Corporate Author Thesis
Publisher Place of Publication New York Editor
Language Wos 000281590800258 Publication Date 2010-01-15
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN Additional Links UA library record; WoS full record
Impact Factor Times cited (down) Open Access
Notes Approved Most recent IF: NA
Call Number UA @ lucian @ c:irua:84893 Serial 217
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Author Pereira, J.M., Jr.; Mlinar, V.; Peeters, F.M.; Vasilopoulos, P.
Title Graphene-based quantum wires Type P1 Proceeding
Year 2007 Publication AIP conference proceedings T2 – 28th International Conference on the Physics of Semiconductors (ICPS-28), JUL 24-28, 2006, Vienna, AUSTRIA Abbreviated Journal
Volume Issue Pages 721-722
Keywords P1 Proceeding; Condensed Matter Theory (CMT)
Abstract We investigate the properties of carriers in graphene-based quantum wires created by potential barriers, by means of analytical and numerical calculations. We obtain expressions for the energy spectrum as a function of barrier height, well width and linear momentum along the wire. The results demonstrate a direction-dependent resonant transmission across the potential well.
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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 893 Series Issue Edition
ISSN 978-0-7354-0397-0; 0094-243x ISBN Additional Links UA library record; WoS full record;
Impact Factor Times cited (down) Open Access
Notes Approved Most recent IF: NA
Call Number UA @ lucian @ c:irua:103601 Serial 1369
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Author Wang, X.F.; Vasilopoulos, P.; Peeters, F.M.
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 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 (down) 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 Zarenia, M.; Vasilopoulos, P.; Pourtolami, N.; Peeters, F.M.
Title Landau-level dispersion and the quantum Hall plateaus in bilayer graphene Type P1 Proceeding
Year 2013 Publication AIP conference proceedings Abbreviated Journal
Volume 1566 Issue Pages 275-276
Keywords P1 Proceeding; Condensed Matter Theory (CMT)
Abstract We study the quantum Hall effect (QHE) in bilayer graphene using the Kubo-Greenwood formula. At zero temperature the Hall conductivity sigma(yx) is given by sigma(yx) – 4(N + 1)e(2)/h with N the index of the highest occupied Landau level (LL). Including the dispersion of the LLs and their width, due to e. g. scattering by impurities, produces the plateau of the n = 0 LL in agreement with experimental results on doped samples and similar theoretical results on single-layer graphene plateaus widen with impurity concentration. Further, the evaluated resistivity rho(xx) exhibits a strong, oscillatory dependence on the electron concentration. Explicit results are obtained for delta-function impurities.
Address
Corporate Author Thesis
Publisher Place of Publication New York Editor
Language Wos 000331793000137 Publication Date 2014-01-03
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN Additional Links UA library record; WoS full record
Impact Factor Times cited (down) Open Access
Notes ; This work was supported by the Flemish Science Foundation (FWO-Vl), the European Science Foundation (project CONGRAN) and the Canadian NSERC Grant No. OGP0121756. ; Approved Most recent IF: NA
Call Number UA @ lucian @ c:irua:115871 Serial 1770
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Author Vasilopoulos, P.; Wang, X.F.; Peeters, F.M.; Chowdhury, S.; Long, A.R.; Davies, J.H.
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 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.
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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 (down) 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 Molnar, B.; Vasilopoulos, P.; Peeters, F.M.
Title Square-wave conductance through a chain of rings due to spin-orbit interaction Type P1 Proceeding
Year 2005 Publication AIP conference proceedings Abbreviated Journal
Volume 772 Issue Pages 1335-1336
Keywords P1 Proceeding; Condensed Matter Theory (CMT)
Abstract We study ballistic electron transport through a finite chain of quantum circular rings in the presence of spin-orbit interaction (SOI) of strength alpha. The transmission and reflection coefficients for a single ring, obtained analytical lylead to the conductance for a chain of rings as a function of alpha and of the wave vector k of the incident electron. Due to destructive spin interferences the chain can be totaly opaque for certain ranges of k the width of which depends on the value of alpha. A periodic modulation of a widens up the gaps considerably and produces a nearly binary conductance output.
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 (down) Open Access
Notes Approved Most recent IF: NA
Call Number UA @ lucian @ c:irua:94771 Serial 3113
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Author Xu, W.; Vasilopoulos, P.; Das, M.P.; Peeters, F.M.
Title Self-consistent g* factor and spin-split Landau levels in strong magnetic fields and at low temperatures Type P3 Proceeding
Year 1995 Publication Abbreviated Journal
Volume Issue Pages 743-746
Keywords P3 Proceeding; Condensed Matter Theory (CMT)
Abstract
Address
Corporate Author Thesis
Publisher World Scientific Place of Publication Singapore Editor
Language Wos Publication Date 0000-00-00
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN ISBN Additional Links UA library record
Impact Factor Times cited (down) Open Access
Notes Approved MATERIALS SCIENCE, MULTIDISCIPLINARY 96/271 Q2 #
Call Number UA @ lucian @ c:irua:12203 Serial 2974
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