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Many-body exchange-correlation effects in graphene

✍ Scribed by E.H. Hwang; Ben Yu-Kuang Hu; S. Das Sarma

Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
169 KB
Volume
40
Category
Article
ISSN
1386-9477

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✦ Synopsis

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.

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