期刊
JOURNAL OF PHYSICS-CONDENSED MATTER
卷 21, 期 30, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/21/30/305302
关键词
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资金
- National Science Foundation of China
- Shanghai Municipal Commission of Science and Technology
- Program for New Century Excellent Talents in University.
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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