NON-ISODISPLACEMENT OF P-ATOMS IN LONG-WAVELENGTH OPTICAL PHONONS IN IN1-XGAXP

被引：32

作者：

JAHNE, E ^{[1
]}

PILZ, W ^{[1
]}

GIEHLER, M ^{[1
]}

HILDISCH, L ^{[1
]}

机构：

[1] ACAD SCI GDR,BEREICH PHYS METHODEN ANALYT CHEM,ZENT INST PHYS CHEM,DDR-1199 BERLIN,GER DEM REP

来源：

PHYSICA STATUS SOLIDI B-BASIC RESEARCH | 1979年 / 91卷 / 01期

关键词：

D O I：

10.1002/pssb.2220910116

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

A study on long‐wavelength optical phonon modes in In1–xGaxP is carried out by infrared reflection and Raman scattering. The oscillator strengths of the single reststrahlen band (one‐mode behaviour) and of the additional band between the TO and LO mode are determined by classical dispersion analysis. The origin of the additional structure is explained by non‐isodisplacement motions of the P atoms in the long‐wavelength phonon modes arising from changes in the nearest‐neighbour force constants with the kind of surrounding atoms. Compositional dependences of the mode frequencies and oscillator strengths are calculated using a virtual crystal model with five types of basic units. Copyright © 1979 WILEY‐VCH Verlag GmbH & Co. KGaA

引用

页码：155 / 165

页数：11

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