Pseudo-Jahn-Teller origin of phonon anomalies in IV-VI compounds

被引：0

作者：

Maksimenko, OB

Mishchenko, AS

机构：

来源：

CRYSTALLOGRAPHY REPORTS | 1997年 / 42卷 / 04期

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D O I：

暂无

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Phonon anomalies in the high-symmetry phase of IV-VI semiconductors are analyzed in the framework of the vibronic theory of ferroelectricity. It is shown that, in the vicinity of the ferroelectric phase transition, the specific features of the lattice dynamics are determined by pseudo-Jahn-Teller interactions, and the interatomic potential depends on the symmetry of the lattice distortions. The above-mentioned approach is used for calculating the phonon spectra of PbTe and PbS.

引用

页码：547 / 552

页数：6

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