Optical conductivity of graphene in the visible region of the spectrum

被引：281

作者：

Stauber, T. ^{[1
,2
]}

Peres, N. M. R. ^{[1
,2
]}

Geim, A. K. ^{[3
]}

机构：

[1] Univ Minho, Ctr Fis, P-4710057 Braga, Portugal

[2] Univ Minho, Dept Fis, P-4710057 Braga, Portugal

[3] Univ Manchester, Manchester Ctr Mesosci & Nanotechnol, Manchester M12 9PL, Lancs, England

来源：

PHYSICAL REVIEW B | 2008年 / 78卷 / 08期

关键词：

D O I：

10.1103/PhysRevB.78.085432

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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)].

引用

页数：8

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