Title

Theory of 2D Transport in Graphene for Correlated Disorder

Document Type

Article

Department/Program

Physics

Journal Title

Physical Review Letters

Pub Date

2011

Volume

107

Issue

15

Abstract

We theoretically revisit graphene transport properties as a function of carrier density, taking into account possible correlations in the spatial distribution of the Coulomb impurity disorder in the environment. We find that the charged impurity correlations give rise to a density-dependent graphene conductivity, which agrees well qualitatively with the existing experimental data. We also find, quite unexpectedly, that the conductivity could increase with increasing impurity density if there is sufficient interimpurity correlation present in the system. In particular, the linearity (sublinearity) of graphene conductivity at lower (higher) gate voltage is naturally explained as arising solely from impurity correlation effects in the Coulomb disorder.

DOI

10.1103/PhysRevLett.107.156601

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