UNIFIED STUDY OF THE LATTICE MECHANICS OF FLUORITES - INDICATIONS OF THE SUPERIONIC PHASE-TRANSITION

被引：2
|
作者：
MAKUR, M
GHOSH, S
机构：
[1] Condensed Matter Physics Reserch Centre, Physics Department, Jadavpur University, Calcutta
来源：
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 1992年 / 173卷 / 02期
关键词：
D O I：
10.1002/pssb.2221730206
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Unified study of the different lattice mechanical properties of the three fluorites CaF2, SrF2, and BaF2 is presented, using a semi-microscopic model and a single set of parameters. The cohesive energy, elastic constants, dielectric constants, and phonon dispersion curves are calculated. The temperature dependence of the phonon frequencies is estimated from a simple quasi-harmonic approach which indicates softening of a [100] zone boundary phonon mode which may lead to the diffuse transition to the superionic state.
引用
收藏
页码：545 / 560
页数：16
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