OPTICAL-ABSORPTION OF FA CENTERS IN MIXED IONIC-CRYSTALS

被引：10

作者：

LOPEZTELLEZ, ER ^{[1
]}

CARDENASGARCIA, D ^{[1
]}

RUIZMEJIA, C ^{[1
]}

RODRIGUEZMIJANGOS, R ^{[1
]}

机构：

[1] UNIV SONORA,CIFUS,HERMOSILLO 83190,MEXICO

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1990年 / 2卷 / 19期

关键词：

D O I：

10.1088/0953-8984/2/19/017

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The shift with concentration variation of the optical absorption F A band in KCl-KBr mixed crystals, with Li impurities is studied by means of the method of Bartram et al. (1968). The distortion around the F A centre is calculated considering the change in the repulsive and polarisation energies due to the impurity. The energy due to this distortion is obtained by a perturbative method. This correction gives good agreement with the experiment values for one of the two absorption bands of the FA centre, but not for the other. Calculations using several types of wavefunction are in approximate agreement with the experimental observations of Asami and Ishiguro (1986).

引用

页码：4513 / 4523

页数：11

共 32 条

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