Origin of Universal Optical Conductivity and Optical Stacking Sequence Identification in Multilayer Graphene

被引：84
|
作者：
Min, Hongki [1 ,2 ,3 ]
MacDonald, A. H. [3 ]
机构：
[1] NIST, Ctr Nanoscale Sci & Technol, Gaithersburg, MD 20899 USA
[2] Univ Maryland, Maryland NanoCtr, College Pk, MD 20742 USA
[3] Univ Texas Austin, Dept Phys, Austin, TX 78712 USA
来源：
PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 06期
关键词：
BAND-STRUCTURE; GRAPHITE;
D O I：
10.1103/PhysRevLett.103.067402
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We show that the origin of the universal optical conductivity in a normal N-layer graphene multilayer is an emergent chiral symmetry which guarantees that sigma(omega)=N sigma(uni) in both low and high-frequency limits. [sigma(uni)=(pi/2)e(2)/h]. We use this physics to relate intermediate frequency conductivity trends to qualitative characteristics of the multilayer stacking sequence.
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页数：4
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