Hydrodynamic theory of transport in doped graphene

被引：69

作者：

Bistritzer, R. ^{[1
]}

MacDonald, A. H. ^{[1
]}

机构：

[1] Univ Texas Austin, Dept Phys, Austin, TX 78712 USA

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 08期

关键词：

electrical resistivity; graphene; high-temperature effects; hydrodynamics; phonons; quasiparticles;

D O I：

10.1103/PhysRevB.80.085109

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study nonlinear dc transport in graphene using a hydrodynamic approach and conclude that in clean samples the drift velocity saturates at a weakly density-dependent value v(sat)similar to 10(7) cm/s. We show that saturation results from the interactions between graphene's Dirac quasiparticles and both acoustic and optical phonons. Saturation is accompanied by substantial electron heating and is not reached at realistic driving fields in moderately or strongly disordered samples. We find that it is essential to account for interactions among graphene's Dirac quasiparticles, which increase the linear-response resistivity at high temperatures or low densities.

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页数：7

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