Disorder-induced pseudodiffusive transport in graphene nanoribbons.

Dietl, P. and Metalidis, G. and Golubev, D. and San-Jose, P. and Prada, E. and Schomerus, Henning and Schoen, G. (2009) Disorder-induced pseudodiffusive transport in graphene nanoribbons. Physical review B, 79 (19). p. 195413. ISSN 1550-235X

[img]
Preview
PDF
PhysRevB_79_195413.pdf - Published Version

Download (219kB)

Abstract

We study the transition from ballistic to diffusive and localized transport in graphene nanoribbons in the presence of binary disorder, which can be generated by chemical adsorbates or substitutional doping. We show that the interplay between the induced average doping (arising from the nonzero average of the disorder) and impurity scattering modifies the traditional picture of phase-coherent transport. Close to the Dirac point, intrinsic evanescent modes produced by the impurities dominate transport at short lengths giving rise to a regime analogous to pseudodiffusive transport in clean graphene, but without the requirement of heavily doped contacts. This intrinsic pseudodiffusive regime precedes the traditional ballistic, diffusive, and localized regimes. The last two regimes exhibit a strongly modified effective number of propagating modes and a mean free path which becomes anomalously large close to the Dirac point.

Item Type: Journal Article
Journal or Publication Title: Physical review B
Additional Information: © 2009 The American Physical Society
Uncontrolled Keywords: /dk/atira/pure/researchoutput/libraryofcongress/qc
Subjects:
Departments: Faculty of Science and Technology > Physics
ID Code: 26643
Deposited By: Dr Henning Schomerus
Deposited On: 19 Jun 2009 09:19
Refereed?: Yes
Published?: Published
Last Modified: 18 Sep 2019 00:29
URI: https://eprints.lancs.ac.uk/id/eprint/26643

Actions (login required)

View Item View Item