LATTICE-DYNAMICS AND RAMAN RESPONSE OF (113) GAAS/ALAS SUPERLATTICES

被引：25
|
作者：
CASTRILLO, P [1 ]
COLOMBO, L [1 ]
ARMELLES, G [1 ]
机构：
[1] CSIC,CTR NACL MICROELECTR,E-28006 MADRID,SPAIN
来源：
PHYSICAL REVIEW B | 1994年 / 49卷 / 15期
关键词：
D O I：
10.1103/PhysRevB.49.10362
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We present a supercell model calculation of the vibrational properties and Raman response of (113)-oriented GaAs/AlAs superlattices. Phonon-dispersion relations are calculated both along the growth axis and in the normal planes. The angular dispersion of the zone-center optical phonons is calculated as well, and some unusual features are discussed. We also calculate the Raman response in the backscattering geometry: to this aim, the bond polarizability model has been suitably extended to the case of arbitrarily oriented superlattices. The effects of the interface cationic diffusion on the Raman spectra are discussed. A comparison with experimental data is finally presented and discussed.
引用
收藏
页码：10362 / 10372
页数：11
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