Many-body exchange-correlation effects in graphene
نویسندگان
چکیده
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. r 2007 Elsevier B.V. All rights reserved. PACS: 81.05.Uw; 71.10. w; 71.18.+y; 73.63.Bd
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