The Coulomb effects in the dynamics of polar lattices

被引:0
|
作者
L. A. Falkovsky
机构
[1] Landau Institute for Theoretical Physics,
关键词
Anisotropy; Dielectric Constant; Phonon Frequency; Coulomb Force; Symmetry Consideration;
D O I
暂无
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.
引用
收藏
页码:840 / 843
页数:3
相关论文
共 50 条