DYNAMICAL STUDY OF PHONONS IN PBTIO3

被引：0
|
作者：
FREIRE, JD [1 ]
KATIYAR, RS [1 ]
机构：
[1] UNIV CAMPINAS,INST FIS GLEB WATAGHIN,BR-13100 CAMPINAS,SP,BRAZIL
来源：
SOLID STATE COMMUNICATIONS | 1981年 / 40卷 / 10期
基金：
巴西圣保罗研究基金会;
关键词：
Lead titanate;
D O I：
10.1016/0038-1098(81)90094-6
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
A lattice dynamical formalism, using a rigid ion model, was applied to the crystal of PbTiO//3 in the tetragonal phase. The model includes long-range Coulomb forces and short-range axially symmetric forces. The radial part of the short-range force constants was assumed to be of Born-Meyer type. The parameters of the model were determined through a least squares analysis of zone center and a few zone boundary phonons. Dispersion curves for left bracket 100 right bracket and left bracket 001 right bracket directions are presented.
引用
收藏
页码：903 / 906
页数：4
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