Show simple item record

dc.creatorKrstajić, Predrag
dc.creatorVasilopoulos, P.
dc.date.accessioned2019-01-30T17:28:21Z
dc.date.available2019-01-30T17:28:21Z
dc.date.issued2011
dc.identifier.issn0953-8984
dc.identifier.urihttp://cer.ihtm.bg.ac.rs/handle/123456789/905
dc.description.abstractWe investigate the electronic properties of graphene nanostructures when the Fermi velocity and the electrostatic potential vary in space. First, we consider the transmission T and conductance G through single and double barriers. We show that G for velocity barriers differs markedly from that for potential barriers for energies below the height of the latter and it exhibits periodic oscillations as a function of the energy for strong velocity modulation. Special attention is given to superlattices (SLs). It is shown that an applied bias can efficiently widen or shrink the allowed minibands of velocity-modulated SLs. The spectrum in the Kronig-Penney limit is periodic in the strength of the barriers. Collimation of an electron beam incident on an SL with velocity and potential barriers is present but it disappears when the potential barriers are absent. The number of additional Dirac points may change considerably if barriers and wells have sufficiently different Fermi velocities.en
dc.publisherIop Publishing Ltd, Bristol
dc.relationCanadian NSERC - OGP0121756
dc.rightsrestrictedAccess
dc.sourceJournal of Physics-Condensed Matter
dc.titleBallistic transport through graphene nanostructures of velocity and potential barriersen
dc.typearticle
dc.rights.licenseARR
dcterms.abstractКрстајић, Предраг; Василопоулос, П.;
dc.citation.volume23
dc.citation.issue13
dc.citation.other23(13):
dc.citation.rankM21
dc.identifier.pmid21403236
dc.identifier.doi10.1088/0953-8984/23/13/135302
dc.identifier.rcubConv_2604
dc.identifier.scopus2-s2.0-79953646421
dc.identifier.wos000288749300006
dc.type.versionpublishedVersion


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record