Journal
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
Volume 40, Issue 5, Pages 1653-1655Publisher
ELSEVIER
DOI: 10.1016/j.physe.2007.10.043
Keywords
graphene; self-energy; quasiparticle properties; RPA
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We calculate, within the leading-order dynamical-screening approximation, the electron self-energy and spectral function at zero temperature for extrinsic (or gated/doped) graphene. We also calculate hot carrier inelastic scattering due to electron-electron interactions in graphene. We obtain the inelastic quasiparticle lifetimes and associated mean free paths from the calculated self-energy. The linear dispersion and chiral property of graphene give energy dependent lifetimes that are qualitatively different from those of parabolic-band semiconductors. (c) 2007 Elsevier B.V. All rights reserved.
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