Transport regimes in surface disordered graphene sheets

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dc.creatorLouis, E.
dc.creatorVerges, J. A.
dc.creatorGuinea, F.
dc.creatorChiappe, G.
dc.date2006-10-09
dc.date2008-02-26
dc.date.accessioned2026-07-07T09:23:07Z
dc.date.available2026-07-07T09:23:07Z
dc.descriptionWe investigate the size scaling of the conductance of surface disordered graphene sheets of width W and length L. Metallic leads are attached to the sample ends across its width. At E ~ 0, the conductance scales with the system size as follows: i) For constant W/L, it remains constant as size is increased, at a value which depends almost lineally on that ratio; this scaling allows the definition of a conductivity value that results similar to the experimental one. ii) For fixed width, the conductance decreases exponentially with length L, both for ordered and disordered samples. Disorder reduces the exponential decay, leading to a higher conductance. iii) For constant length, conductance increases linearly with width W, a result that is exclusively due to the tails of the states of the metallic wide contact. iv) The average conductance does not show an appreciable dependence on magnetic field. Away from E = 0, the conductance shows the behavior expected in two-dimensional systems with surface disorder, i.e., ballistic transport.
dc.description4 pages, 5 figures, RevTex
dc.identifierhttps://arxiv.org/abs/cond-mat/0610201
dc.identifierhttp://arxiv.org/abs/cond-mat/0610201
dc.identifierPhys. Rev. B 75, 085440 (2007)
dc.identifierdoi:10.1103/PhysRevB.75.085440
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/155620
dc.subjectMesoscale and Nanoscale Physics
dc.subjectMaterials Science
dc.titleTransport regimes in surface disordered graphene sheets
dc.typetext

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