Optical properties of graphene: The Fermi-liquid approachM. I. Katsnelson
Institute for Molecules and Materials, Radboud University Nijmegen - 6525 ED Nijmegen, The Netherlands, EU
received 5 September 2008; accepted in final form 23 September 2008; published October 2008
published online 7 October 2008
Optical properties of two-dimensional massless Dirac fermions are considered by the formalism of pseudospin precession equations which provides an easy and natural semiphenomenological way to include correlation effects. It is shown that the latter are negligible, with the only assumption that the system under consideration is normal Fermi-liquid. This result probably explains recent experimental data on the universal optical conductivity of graphene (NAIR R. R. et al., Science, 320 (2008) 1308).
78.20.Bh - Theory, models, and numerical simulation.
81.05.Uw - Carbon, diamond, graphite.
71.10.Ay - Fermi-liquid theory and other phenomenological models.
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