各向异性
四方晶系
凝聚态物理
对称(几何)
正交晶系
横截面
声子
平面(几何)
材料科学
物理
衍射
光学
几何学
量子力学
相(物质)
数学
结构工程
工程类
作者
Kei May Lau,A. K. McCurdy
出处
期刊:Physical review
日期:1998-10-01
卷期号:58 (14): 8980-8984
被引量:122
标识
DOI:10.1103/physrevb.58.8980
摘要
Elastic anisotropy factors are derived for each of the three modes of propagation from the special in-plane phonon-focusing considerations arising when wave vectors are constrained to the symmetry planes of orthorhombic, tetragonal, and hexagonal crystals. Elastic anisotropy factors for the pure transverse and quasi-transverse modes depend upon the symmetry plane, whereas anisotropy factors for the quasilongitudinal mode depend both upon a symmetry plane and a symmetry axis. These anisotropy factors provide a convenient measure of in-plane phonon focusing.
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