SHORT-RANGE ORDER IN AMORPHOUS (GE(1-X)M(X))SE-2 (M=AS,SB AND BI)

被引：12
|
作者：
UEMURA, O
NAGATA, Y
USUKI, T
KAMEDA, Y
机构：
[1] Department of Chemistry, Faculty of Science, Yamagata University, Yamagata
来源：
JOURNAL OF NON-CRYSTALLINE SOLIDS | 1995年 / 193卷
关键词：
D O I：
10.1016/0022-3093(95)00485-8
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：
X-ray diffraction and Raman scattering measurements have been carried out on amorphous (Ge(1-x)M(x))Se-2 (M = As, Sb and Bi). The results indicate that pyramidal structural units, MSe(3/2), in which an M atom is covalently surrounded by three Se atoms, are incorporated into the tetrahedral GeSe4/2 network matrix, although the Bi-Se distance in the BiSe3/2 unit is somewhat longer than the covalent one. It is concluded that the occurrence of a p-n transition in the Bi glasses results from the inherent n-type nature of the BiSe3/2 unit.
引用
收藏
页码：74 / 78
页数：5
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