COULOMB INTERACTION AND PHONON FREQUENCY DISPERSION - AN ANALYTIC APPROXIMATION OF THE LONG-RANGE COULOMB PART OF DYNAMIC MATRIX

被引:3
作者
SMIRNOV, MB
机构
[1] Institute for Silicate Chemistry, 199034 St. Petersburg
关键词
D O I
10.1016/0038-1098(93)90466-Z
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
The Lorenz approach to evaluation of the electric field in a polarized medium is extended to finite wave-length polarization and a simple analytic approximation of the long-range Coulomb part of dynamic matrix of a crystal is proposed. The error of the proposed approximation and its computational efficiency are discussed by its application to the phonon dispersion relation and density of states calculation for various ionic and semi-ionic crystals.
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收藏
页码:459 / 465
页数:7
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