Lattice vibrations in CuIn1-xGaxSe2 crystals

被引：54

作者：

Syrbu, NN

Bogdanash, M

Tezlevan, VE

Mushcutariu, I

机构：

[1] INST CONDENSED MATTER,R-1900 TIMISOARA,ROMANIA

[2] MOLDAVIAN ACAD SCI,INST APPL PHYS,KISHINEV 277028,MOLDOVA

来源：

PHYSICA B | 1997年 / 229卷 / 02期

关键词：

lattice vibrations; CuIn1-xGaxSe2; reflectivity spectra;

D O I：

10.1016/S0921-4526(96)00512-1

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Infrared reflectivity spectra of CuInSe2, CuGaSe2 and CuIn1-xGaxSe2 solid solutions have been investigated for the polarizations E parallel to c and E perpendicular to c. Reflectivity spectrum contours are calculated and phonon parameters and dielectric constant are determined. The dependence of the longitudinal-transverse splitting, the oscillator strength and the damping factor on x composition are shown. Raman scattering of CuIn1-xGaxSe2 solid solution has been investigated. Effective ionic charges for ions of these materials are determined. Two-phonon absorption spectra in CuGaSe2 and CuInSe2 have been investigated and absorption bands have been identified in accordance with selection rules.

引用

页码：199 / 212

页数：14

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