Optical vibration modes and electron-phonon interaction in ternary mixed crystals of polar semiconductors

被引:2
作者
Liang, XX [1 ]
Ban, SL [1 ]
机构
[1] Inner Mongolia Univ, Dept Phys, Hohhot 010021, Peoples R China
来源
CHINESE PHYSICS | 2004年 / 13卷 / 01期
关键词
optical vibration mode; electron-phonon interaction; ternary mixed crystal;
D O I
10.1088/1009-1963/13/1/014
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Optical vibrations of the lattice and the electron-phonon interaction in polar ternary mixed crystals are studied in the framework of the continuum model of Born and Huang and the random-element-isodisplacement model. A normal-coordinate system to describe the optical vibration in ternary mixed crystals is correctly adopted to derive a new Frohlich-like Hamiltonian for the electron-phonon interaction including the unit-cell volume variation influence. The numerical results for the phonon modes, the electron-phonon coupling constants and the polaronic energies for several typical materials are obtained. It is verified that the nonlinearity of the electron-phonon coupling effects with the composition is essential and the unit-cell volume effects cannot be neglected for most ternary mixed crystals.
引用
收藏
页码:71 / 81
页数:11
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