Volume 84, Number 3, November 2008
Article Number 37001
Number of page(s) 3
Section Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
Published online 07 October 2008
EPL, 84 (2008) 37001
DOI: 10.1209/0295-5075/84/37001

Optical properties of graphene: The Fermi-liquid approach

M. 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.

© EPLA 2008