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  • PhysRevB 79 195413

    Rights statement: © 2009 The American Physical Society

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Disorder-induced pseudodiffusive transport in graphene nanoribbons.

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<mark>Journal publication date</mark>13/05/2009
<mark>Journal</mark>Physical review B
Issue number19
Volume79
Number of pages0
Pages (from-to)195413
Publication StatusPublished
<mark>Original language</mark>English

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.

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© 2009 The American Physical Society