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

页码：10362 / 10372

页数：11

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