RAMAN-SPECTROSCOPIC STUDY OF HIGH-PRESSURE PHASE-TRANSITIONS IN AGGASE2

被引：14
|
作者：
ARORA, AK [1 ]
SAKUNTALA, T [1 ]
ARTUS, L [1 ]
机构：
[1] CSIC,INST CIENCIA MAT BARCELONA,BARCELONA,SPAIN
来源：
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 1993年 / 54卷 / 03期
关键词：
TERNARY CHALCOPYRITE; RAMAN SCATTERING; HIGH PRESSURE; PHASE TRANSITIONS;
D O I：
10.1016/0022-3697(93)90273-T
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Phase transitions in ternary chalcopyrite AgGaSe2 are investigated up to a pressure of 160 kbar using Raman scattering. Pressure dependence of phonon frequencies suggests three phase transitions occurring around 30, 51 and 83 kbar, respectively. The band gap is found to increase with an increase in pressure up to 51 kbar. The phases above 51 kbar are opaque to visible light. Comparison of phase transitions in this compound with other chalcopyrites indicates a reduced stability of the tetragonal structure with an increasing mass of chalcogen anion.
引用
收藏
页码：381 / 385
页数：5
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