Dispersion of optical and acoustic phonons in diamond and germanium crystals

被引：3
|
作者：
Gorelik, V. S. [1 ]
Vasil'ev, N. S. [2 ]
机构：
[1] Russian Acad Sci, Lebedev Inst Phys, Moscow 119991, Russia
[2] Bauman State Tech Univ, Moscow 107005, Russia
来源：
INORGANIC MATERIALS | 2012年 / 48卷 / 05期
基金：
俄罗斯基础研究基金会;
关键词：
SILICON;
D O I：
10.1134/S0020168512050068
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The dispersion laws of the optical and acoustic branches in diamond-like crystals have been derived using idealized models of crystal lattices. Two types of analytical expressions have been proposed, whose parameters can be derived from inelastic neutron scattering experiments and the properties of acoustic waves. The calculation results are in satisfactory agreement with experimental data for the crystallographic directions [100], [110], and [111]. The group velocities of optical and acoustic phonons have been determined, and expressions for the effective mass of optical phonons have been derived.
引用
收藏
页码：462 / 468
页数：7
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