ORDER-DISORDER INTERPLAY IN ALZGA1-ZAS SUPERLATTICES - CALCULATION OF INFRARED AND RAMAN-SPECTRA

被引：0

作者：

BERNASCONI, M ^{[1
]}

COLOMBO, L ^{[1
]}

MIGLIO, L ^{[1
]}

MOLTENI, C ^{[1
]}

机构：

[1] UNIV MILAN,DIPARTMENTO FIS,I-20133 MILAN,ITALY

来源：

SUPERLATTICES AND MICROSTRUCTURES | 1991年 / 10卷 / 02期

关键词：

D O I：

10.1016/0749-6036(91)90221-C

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We compare the dynamical properties of AlχGa1-χAs AlyGa1-yAs superlattices, AlxGa1-xAs homogeneous alloys and GaAs AlAs superlattices. The interplay between the local compositional disorder of the lattice and the order imposed by the superperiodicity is investigated within a Bond Charge Model dynamics, Mass Defect perturbation, Average t-matrix Approximation as well as by a supercell approach. We describe both the acoustic disorder-activated and the optical quantized modes by means of the calculation of the dielectric function and the Raman intensity in backscattering geometry within the Bond Polarizability model. © 1991.

引用

页码：153 / 156

页数：4

共 6 条

[1]

BERNASCONI M, UNPUB PHYS REV B

[2] THEORY AND PROPERTIES OF RANDOMLY DISORDERED CRYSTALS AND RELATED PHYSICAL SYSTEMS [J].