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Chinese Physics, 2004, Vol. 13(1): 71-81    DOI: 10.1088/1009-1963/13/1/014
CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES Prev   Next  

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

Liang Xi-Xia (梁希侠), Ban Shi-Liang (班士良)
Department of Physics, Inner Mongolia University, Hohhot 010021, China
Abstract  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 Fr?hlich-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.
Keywords:  optical vibration mode      electron-phonon interaction      ternary mixed crystal  
Received:  12 March 2003      Revised:  09 July 2003      Accepted manuscript online: 
PACS:  63.20.K- (Phonon interactions)  
  71.38.-k (Polarons and electron-phonon interactions)  
Fund: Project supported partly by the National Natural Science Foundation of China (Grant No 10164003).

Cite this article: 

Liang Xi-Xia (梁希侠), Ban Shi-Liang (班士良) Optical vibration modes and electron-phonon interaction in ternary mixed crystals of polar semiconductors 2004 Chinese Physics 13 71

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