Degree Type

Thesis

Date of Award

2011

Degree Name

Master of Science

Department

Physics and Astronomy

First Advisor

Joerg Schmalian

Abstract

We investigate the nonlinear dc conductivity of graphene by explicitly solving the Boltzmann equation with relaxation and particle-hole pair production contributions and obtain the non-equilibrium electronic distribution function. First by considering electron-phonon scattering and the Schwinger mechanism, which leads to particle-hole creation and, consequently, to interband transitions, we show that, in the limit of weak external electric field one recovers Ohm's law, while above a threshold field E=(T2)/(evF) the dc conductivity varies as the inverse of the square root of external electric field. In particular, we obtain nontrivial result for the effective temperature of this electronic system by scaling.

Copyright Owner

Meng-chieh Ling

Language

en

Date Available

2012-04-30

File Format

application/pdf

File Size

53 pages

Included in

Physics Commons

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