Measurement of scattering rate and minimum conductivity in graphene

被引：856

作者：

Tan, Y. -W. ^{[1
]}

Zhang, Y. ^{[1
]}

Bolotin, K. ^{[1
]}

Zhao, Y. ^{[1
]}

Adam, S. ^{[2
]}

Hwang, E. H. ^{[2
]}

Das Sarma, S. ^{[2
]}

Stormer, H. L. ^{[1
,3
,4
]}

Kim, P. ^{[1
]}

机构：

[1] Columbia Univ, Dept Phys, New York, NY 10027 USA

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

[3] Columbia Univ, Dept Appl Phys, New York, NY 10027 USA

[4] Alcatel Lucent Technol, Bell Labs, Murray Hill, NJ 07974 USA

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 99卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.99.246803

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The conductivity of graphene samples with various levels of disorder is investigated for a set of specimens with mobility in the range of 1-20 x 10(3) cm(2)/V sec. Comparing the experimental data with the theoretical transport calculations based on charged impurity scattering, we estimate that the impurity concentration in the samples varies from 2-15 x 10(11) cm(-2). In the low carrier density limit, the conductivity exhibits values in the range of 2-12e(2)/h, which can be related to the residual density induced by the inhomogeneous charge distribution in the samples. The shape of the conductivity curves indicates that high mobility samples contain some short-range disorder whereas low mobility samples are dominated by long-range scatterers.

引用

页数：4

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