A study of the self-trapped exciton and F centre in MgF2

被引：8
|
作者：
Chen, LF [1 ]
Zhou, L [1 ]
Song, KS [1 ]
机构：
[1] UNIV OTTAWA,DEPT PHYS,OTTAWA,ON K1N 6N5,CANADA
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 1997年 / 9卷 / 31期
关键词：
D O I：
10.1088/0953-8984/9/31/015
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The self-trapped excitons (STEs) and F centres in MgF2 are studied within the extended-ion approximation. It is found that the STE is in bet a nearest-neighbour F-H pair with C-1 symmetry. The theoretical results for the spectra of the STEs and F centres are in good agreement with experiments. The stable F-H pairs converted from STEs are generated only at the hole excited state of the STEs according to the calculations of the adiabatical potential energy curve of the STE/FH pair. A model of the excited-hole hopping diffusion is proposed to explain the reorientation of the H centre and the formation of the F-H pair under cascade excitation.
引用
收藏
页码：6633 / 6642
页数：10
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