Anisotropic polarization due to electron-phonon interactions in graphene

被引：1
|
作者：
李武群 [1 ]
曹俊诚 [1 ]
机构：
[1] State Key Laboratory of Functional Materials for Informatics,Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences
来源：
半导体学报 | 2009年 / 30卷 / 11期
基金：
中国国家自然科学基金;
关键词：
graphene; electron-phonon interaction; anisotropy; polarization;
D O I：
暂无
中图分类号：
O641.1 [化学键理论];
学科分类号：
070304 ; 081704 ;
摘要：
Polarization plays an important role in the Raman spectroscopy.We study,in graphene,anisotropic polarization due to electron-phonon coupling (EPC).The numerical results show that the anisotropy is obvious even when the wave vector is in the range of the Raman experiment.The analytical expression is deduced from the structure factor,which indicates the crucial origin of the anisotropy.We also find that,as the phonon energy increases the polarization is clearly weakened due to the screen effect of EPC,but the anisotropy totally remains.
引用
收藏
页码：6 / 9
页数：4
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