HIGH-PRESSURE BEHAVIOR OF RAMAN MODES IN CUGAS2

被引：46

作者：

GONZALEZ, J ^{[1
]}

FERNANDEZ, BJ ^{[1
]}

BESSON, JM ^{[1
]}

GAUTHIER, M ^{[1
]}

POLIAN, A ^{[1
]}

机构：

[1] UNIV PARIS 06,F-75252 PARIS 05,FRANCE

来源：

PHYSICAL REVIEW B | 1992年 / 46卷 / 23期

关键词：

D O I：

10.1103/PhysRevB.46.15092

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The Raman-active modes of CuGaS2 have been investigated at ambient temperature under high pressure using neon gas as pressure transmitting medium up to 18 GPa. An assignment of the symmetry of the zone-center modes is proposed on the basis of their pressure dependence as compared to that of the corresponding modes in zinc-blende ZnS. Under quasihydrostatic conditions and in the absence of shear stress, no broadening of lattice modes occurs prior to the transition and the metastability of the chalcopyrite lattice is shown to extend to at least 18.4 GPa, which is well into the domain of stability of the high-pressure rocksalt phase.

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页码：15092 / 15101

页数：10

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