半导体学报2009，Vol.30Issue(11)：6-9,4.DOI:10.1088/1674-4926/30/11/112002
Anisotropic polarization due to electron-phonon interactions in graphene
Anisotropic polarization due to electron-phonon interactions in graphene
摘要
Abstract
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.关键词
graphene/ electron-phonon interaction/ anisotropy/ polarizationKey words
graphene/ electron-phonon interaction/ anisotropy/ polarization分类
数理科学引用本文复制引用
Li Wuqun,Cao Juncheng..Anisotropic polarization due to electron-phonon interactions in graphene[J].半导体学报,2009,30(11):6-9,4.基金项目
Project supported by the State Key Development Program for Basic Research of China (No. 2007CB310402), the National Natural Science Foundation of China (No. 60721004), the Shanghai Municipal Commission of Science and Technology (Nos. 06dj14008, 06CA07001),and the Major Poject and "Hundred Scholar Plan" of the Chinese Academy of Sciences. （No. 2007CB310402）
