Far infrared spectra and bonding arrangement in some Ge-Sb-S glasses

被引：0
|
作者：
Vahalová, R
Tichy, L
Vlcek, M
Tichá, H
机构：
[1] Acad Sci Czech Republic, Joint Lab Solid State Chem, CZ-53210 Pardubice, Czech Republic
[2] Univ Pardubice, CZ-53210 Pardubice, Czech Republic
[3] Univ Pardubice, CZ-53210 Pardubice, Czech Republic
来源：
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2000年 / 181卷 / 01期
关键词：
D O I：
10.1002/1521-396X(200009)181:1<199::AID-PSSA199>3.0.CO;2-X
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Bulk glasses GexSb0.05S0.95-x and GexSb0.1S0.9-x were prepared. Both the optical gap (E-03) and the compactness (C) dependence against the mean coordination number (CN) indicates threshold-like behavior around Tanaka's threshold. Using simple covalent bond statistics the far infrared spectra are discussed in relation to possible bonding arrangements in the studied glasses. The analysis reveals (i) preference of Ge-S bond formation at the expense of Sb-S bond formation in chalcogen poor glasses, and (ii) the threshold-like behavior in E-03 and C dependences against [CN] can be attributed to the chemical threshold, that is to such chemical composition and bonding arrangement where the system reached the most stable state with respect to formation energy.
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页码：199 / 209
页数：11
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