OPTICAL PHONON-SPECTRA OF GASB ALSB SUPERLATTICES - INFLUENCE OF STRAIN AND INTERLACE ROUGHNESSES/

Authors
DASILVA SW PUSEP YA GALZERANI JC LUBYSHEV DI MILEKHIN AG PREOBRAZHENSKII VV PUTIATO MA SEMJAGIN BR
Citation
Sw. Dasilva et al., OPTICAL PHONON-SPECTRA OF GASB ALSB SUPERLATTICES - INFLUENCE OF STRAIN AND INTERLACE ROUGHNESSES/, Journal of applied physics, 80(1), 1996, pp. 597-599
Citations number
11
Categorie Soggetti
Physics, Applied
Journal title
Journal of applied physics → ACNP
ISSN journal
00218979
Volume
80
Issue
1
Year of publication
1996
Pages
597 - 599
Database
ISI
SICI code
0021-8979(1996)80:1<597:OPOGAS>2.0.ZU;2-K
Abstract
Raman spectroscopy indicates the formation of extended intermixture al loy regions at the interfaces in the GaSb/AlSb superlatttices, which s uppress the optical confined modes. A misfit strain was found to be re sponsible for the high-frequency shift of the optical phonons confined in the AlSb layers. It turned out that; in the ultrathin layer CaSb/A lSb superlattices with layer thicknesses less than 7 monolayers, the s train was completely relaxed in the alloy interface regions. (C) 1996 American Institute of Physics.