Fermi velocity renormalization in doped graphene

Physica Status Solidi B 246, 2523 - 2526 (2009)

Fermi velocity renormalization in doped graphene

C. Attaccalite, A. Rubio

We present an ab-initio study of the graphene quasi-particle band structure in GW approximation. In particular we studied the renormalization of the Fermi velocity vF as function of the electrostatic doping. We show that the LDA Fermi velocity is substantially renormalized by correlation effects and that this renormalization rapidly decreases with doping. We discuss our results in the light of recent experiments on graphene and intercalate graphite.

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