THE QUASIPHONON MODEL OF AMORPHOUS SOLIDS AND THE PERCUS-YEVICK APPROXIMATION

被引：2
|
作者：
KOVALENKO, NP
KRASNY, YP
WECK, G
机构：
[1] HUMBOLDT UNIV,O-1040 BERLIN,GERMANY
[2] ODESSA TECH FOOD IND INST,ODESSA 270108,UKRAINE,USSR
来源：
PHYSICA STATUS SOLIDI B-BASIC RESEARCH | 1991年 / 166卷 / 01期
关键词：
GLASS;
D O I：
10.1002/pssb.2221660112
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The quasiphonon model is used to describe thermodynamical features of amorphous solids in the low temperature range (T almost-equal-to 20 to 50 K). Using the r-representation of the particle interaction potential and correlation functions the quasiphonon dispersion relation omega-alpha-(k) of binary amorphous solids may be calculated analytically in the Percus-Yevick approximation. This relation is obtained in a form with the characteristic roton-similar minimum in the shortwave range of k. Even this minimum could be the reason for anomalous thermodynamical properties of such amorphous systems.
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页码：117 / 124
页数：8
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