The spin-orbit interaction enhanced terahertz absorption in graphene around the K point

被引：4

作者：

Wright, A. R. ^{[1
,2
]}

Wang, G. X. ^{[2
,3
]}

Xu, W. ^{[4
]}

Zeng, Z. ^{[5
]}

Zhang, C. ^{[1
,2
]}

机构：

[1] Univ Wollongong, Sch Engn Phys, Wollongong, NSW 2522, Australia

[2] Univ Wollongong, Inst Superconducting & Elect Mat, Wollongong, NSW 2522, Australia

[3] Univ Wollongong, Sch Mech Mat & Mechatron Engn, Wollongong, NSW 2522, Australia

[4] Australian Natl Univ, RSPHYSSE, Dept Theoret Phys, Canberra, ACT 0200, Australia

[5] Chinese Acad Sci, Inst Solid State Phys, Hefei 230031, Peoples R China

来源：

MICROELECTRONICS JOURNAL | 2009年 / 40卷 / 4-5期

基金：

澳大利亚研究理事会;

关键词：

Graphene; Absorption; Spin-orbit interaction;

D O I：

10.1016/j.mejo.2008.11.019

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We present a quantitative analysis on the effect of the spin-orbit interaction in the optical absorption of pi-electrons in graphene. It has been shown that the optical absorption amplitude of graphene around the K point in the Brillouin zone has a node in the two-dimensional Brillouin zone of honeycomb lattice. We calculated the k-dependent absorption matrix by taking into account the finite spin-orbit interaction in graphene. It was found that the spin-orbit interaction lifts the nodes in the absorption matrix. Furthermore, in the terahertz frequency regime, the spin-orbit interaction can significantly enhance the optical absorption in graphene, by LIP to 100%. Crown Copyright (C) 2008 Published by Elsevier Ltd. All rights reserved.

引用

页码：857 / 859

页数：3

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