Microstructure of pair centers of Cr3+-Cr2+ ions in the KZnF3 crystal

被引：0
|
作者：
M. V. Eremin
S. I. Nikitin
N. I. Silkin
S. Yu. Prosvirin
R. V. Yusupov
机构：
[1] Kazan State University,
来源：
Journal of Experimental and Theoretical Physics | 1998年 / 87卷
关键词：
Spectroscopy; Microstructure; State Physics; Field Theory; Elementary Particle;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Studies involving the piezospectroscopy method have shown that the symmetry of the pair centers of Cr3+-Cr2+ ions in the KZnF3 crystal is tetragonal. In this paper we develop a microscopic model of a pair center. We use the temperature dependence of the integrated intensity of the absorption line to find the effective hopping integral for an eg electron, tσσ=205 ± 10 cm−1, and the polaron reduction factor, equal to 0.11. By analyzing the selection rules for exchange-induced electric dipole transitions under double-exchange conditions we identify all the absorption lines of Cr3+-Cr2+ pairs.
引用
收藏
页码：771 / 775
页数：4
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