Theory of 2D Transport in Graphene for Correlated Disorder

被引：69

作者：

Li, Qiuzi ^{[1
]}

Hwang, E. H. ^{[1
]}

Rossi, E. ^{[2
]}

Das Sarma, S. ^{[2
]}

机构：

[1] Univ Maryland, Dept Phys, Condensed Matter Theory Ctr, College Pk, MD 20742 USA

[2] Coll William & Mary, Dept Phys, Williamsburg, VA 23187 USA

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 15期

关键词：

SCATTERING; GAS;

D O I：

10.1103/PhysRevLett.107.156601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页数：5

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YAN J, ARXIV11064835

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