Work

Optical conductivity of graphene in the visible region of the spectrum

Year: 2008

Type: article

Abstract: We compute the optical conductivity of graphene beyond the usual Dirac-cone approximation, giving results that are valid in the visible region of the conductivity spectrum. The effect of next-nearest-neighbor hopping is also discussed. Using the full expression for the optical conductivity, the transmission and reflection coefficients are given. We find that even in the optical regime the corrections to the Dirac-cone approximation are surprisingly small (a few percent). Our results help in the interpretation of the experimental results reported by Nair et al. [Science 320, 1308 (2008)].

Source: Physical Review B

DOI: 10.1103/physrevb.78.085432

Authors: T. Stauber, N. M. R. Peres, A. K. Geim

Institutions: Centro de Física das Universidades do Minho e do Porto, University of Minho, University of Manchester

Language: English

Topic: Graphene research and applications

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

Funders: Fundação para a Ciência e a Tecnologia, European Social Fund

Award: Propriedades de transporte em grafeno e sistemas relacionados