EQUIVALENCE OF THE FROHLICH AND THE BLOCH APPROACHES TO THE ELECTRON-PHONON COUPLING

被引:25
作者
ASHKENAZI, J
DACOROGNA, M
PETER, M
机构
[1] Département de Physique de la Matière Condensée, Université de Genève, 1211 Genève 4
关键词
D O I
10.1016/0038-1098(79)91034-2
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
It is shown that the Fröhlich approach for calculating electron-phonon coupling constants based on wave functions moving with the vibrating atoms can be set on a rigorous basis. This approach and the Bloch approach are shown to lead to the same physical results provided that one stays within the adiabatic approximation and considers both first and second order vertices (in the harmonic approximation). Advantages of the Fröhlich approach in past and in possible future calculations are discussed. © 1979.
引用
收藏
页码:181 / 184
页数:4
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