The Coulomb effects in the dynamics of polar lattices

被引：0
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作者：
L. A. Falkovsky
机构：
[1] Landau Institute for Theoretical Physics,
来源：
Journal of Experimental and Theoretical Physics | 2001年 / 92卷
关键词：
Anisotropy; Dielectric Constant; Phonon Frequency; Coulomb Force; Symmetry Consideration;
D O I：
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中图分类号：
学科分类号：
摘要：
The zone-center phonon frequencies of polar lattices are calculated for uniaxial crystals proceeding from the symmetry considerations. The long-range Coulomb forces and crystal anisotropy are explicitly taken into account. The free-carrier contributions to the dielectric constant are included. The angular dispersion of the optical-phonon modes is compared to data for a hexagonal 6H-SiC polytype.
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页码：840 / 843
页数：3
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