RAMAN-SCATTERING AND PHASE-TRANSFORMATIONS OF TLGASE2 AND TLGAS2 UNDER PRESSURE

被引：35

作者：

VINOGRADOV, EA

ZHIZHIN, GN

MELNIK, NN

SUBBOTIN, SI

PANFILOV, VV

ALLAKHVERDIEV, KR

SALAEV, EY

NANI, RK

机构：

[1] ACAD SCI USSR,INST HIGH PRESSURE PHYS,TROITSK,USSR

[2] ACAD SCI AZSSR,INST PHYS,BAKU,AZSSR

来源：

PHYSICA STATUS SOLIDI B-BASIC RESEARCH | 1979年 / 95卷 / 02期

关键词：

D O I：

10.1002/pssb.2220950208

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Raman spectra of single crystals TlGaS2 and TlGaSe2 are investigated in equilibrium conditions at room temperature under various hydrostatic pressures up to 7.25 and 9.27 kbar, respectively. Phase transitions at about 5 kbar are shown to occur in both the single crystals. Mode parameters γi = (1/vi) (dvi/dP) are determined for most of the Raman bands observed. The different values of these parameters are used to find out which frequencies have to be assigned to interlayer vibrations. It is shown that Raman spectra can be explained best when the unit cell of TlGaS2 and TlGaSe2 is supposed to contain two layers and the structure of the layer is supposed to be similar to that of TlSe. Copyright © 1979 WILEY‐VCH Verlag GmbH & Co. KGaA

引用

页码：383 / 390

页数：8

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