Many-body exchange-correlation effects in graphene

Details Many-body exchange-correlation effects in graphene Many-body exchange-correlation effects in graphene

2007-07-31

arxiv.org/abs/0707.4674v1

Physica E 40, 1653 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Submitted on July 8, 2007 to EP2DS-17, Genova, Italy

Scientific paper

10.1016/j.physe.2007.10.043

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 gives energy dependent lifetimes that are qualitatively different from those of parabolic-band semiconductors.

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