THEORY OF RAMAN-SCATTERING ON POLAR PHONONS

被引：15

作者：

OVANDER, LN

TYU, NS

机构：

[1] Physico-Technical Institute, Academy of Sciences of the Ukrainian Ssr

来源：

PHYSICA STATUS SOLIDI B-BASIC RESEARCH | 1979年 / 91卷 / 02期

关键词：

D O I：

10.1002/pssb.2220910245

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Raman scattering (RS) on dipole‐active phonons in crystals of all kinds of symmetry is investigated for the case of arbitrary direction of a vibrational wave vector. The explicit form of RS tensor associated with electrooptic scattering mechanism is obtained. A comparison is made with the tensor obtained within the framework of polarizability theory. The electrooptic mechanism is shown to contribute to the scattering intensity on transverse phonons which is caused by local fields generated by dipole vibrations. The violation of selection rules due to the dipole vibration macroscopic field is investigated. It is shown how electrooptic mechanism contribution to scattering intensity can be separated in the explicit form in all anisotropic crystals. Copyright © 1979 WILEY‐VCH Verlag GmbH & Co. KGaA

引用

页码：763 / 772

页数：10

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