Fundamental optical absorption edge and exciton-phonon interaction in Cu6PS5Br superionic ferroelastic

被引：38

作者：

Studenyak, IP

Kranjcec, M

Kovacs, GS

Pan'ko, VV

Azhniuk, YM

Desnica, ID

Borets, OM

Voroshilov, YV

机构：

[1] Rudjer Boskovic Inst, Zagreb 10000, Croatia

[2] Uzhgorod State Univ, UA-294000 Uzhgorod, Ukraine

[3] Geotech Fac Varazdin, Varazhdin 42000, Croatia

[4] Ukrainian Acad Sci, Inst Electron Phys, UA-294016 Uzhgorod, Ukraine

来源：

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY | 1998年 / 52卷 / 2-3期

关键词：

superionic ferroelastics; direct exciton absorption; Urbach's tail; exciton-phonon interaction; structural disorder;

D O I：

10.1016/S0921-5107(97)00278-X

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The absorption edge of monocrystalline Cu6PS5Br was studied in the 4.2-505 K temperature range. At low temperatures (T < 180 K), Wannier-Mott s-excitons were detected at the absorption edge as well as in the photoluminescence spectra and, their basic parameters at 77 K were estimated. The mechanisms of exciton-photon interaction resulting in exponential absorption edge and Urbach's tail at temperatures T > 200 K were analyzed and interpreted in the framework of the Dow-Redfield theory. Two types of structural disorder affecting the optical absorption tail were studied. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：202 / 207

页数：6

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