Floppy modes and relaxation in GexSe1-x glasses

被引：13

作者：

Wang, Y ^{[1
]}

Murase, K ^{[1
]}

机构：

[1] Osaka Univ, Dept Phys, Grad Sch Sci, Osaka 5600043, Japan

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2003年 / 326卷

关键词：

D O I：

10.1016/S0022-3093(03)00441-1

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Floppy modes and relaxation processes in the GexSe1-x glasses system are studied by vibrational methods. We reporL Raman spectral line shapes over a temperature range from 100 to 300 K. Normalized frequency shifts with temperature of the GeSe4/2 breathing mode and the Se-Se stretching mode depend on the Ge composition. The results are associated with the stiffness transition window in which we suggest a radical decrease of Se-n (n > 2) segments which could be regarded as the microscopic origin of floppy modes in the Se-containing network glasses. (C) 2003 Published by Elsevier B.V.

引用

页码：379 / 384

页数：6

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