Nonlinear dc transport in graphene

被引：25
|
作者：
Bao, W. S. [1 ]
Liu, S. Y. [1 ]
Lei, X. L. [1 ]
Wang, C. M. [2 ]
机构：
[1] Shanghai Jiao Tong Univ, Dept Phys, Shanghai 200240, Peoples R China
[2] Anyang Normal Univ, Dept Phys, Anyang 455000, Peoples R China
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2009年 / 21卷 / 30期
基金：
美国国家科学基金会;
关键词：
STRONG ELECTRIC-FIELD; CONDUCTIVITY; GRAPHITE; CARBON; SEMICONDUCTORS; GAS;
D O I：
10.1088/0953-8984/21/30/305302
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Considering electron-impurity, electron-acoustic-phonon and electron-optical-phonon scatterings, the nonlinear steady-state transport properties of graphene are studied theoretically by means of the balance equation approach. We find that the conductivity as a function of electric field strength, E, exhibits strongly nonlinear behavior for E larger than a critical value, E-c approximate to 0.1 kV cm(-1). With the increase of E from zero, the conductivity first decreases slowly and then it falls rapidly when E > E-c. The dependence of electron temperature on E is also demonstrated.
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页数：5
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