Observation of zinc-blende to diamond transition in metastable (GaAs)(1-x)(Ge-2)(x) alloys by Raman scattering

Authors
Salazar-Hernandez, B Vidal, MA Constantino, ME Navarro-Contreras, H
Citation
B. Salazar-hernandez et al., Observation of zinc-blende to diamond transition in metastable (GaAs)(1-x)(Ge-2)(x) alloys by Raman scattering, SOL ST COMM, 109(5), 1999, pp. 295-300
Citations number
23
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SOLID STATE COMMUNICATIONS
ISSN journal
00381098 → ACNP
Volume
109
Issue
5
Year of publication
1999
Pages
295 - 300
Database
ISI
SICI code
0038-1098(1999)109:5<295:OOZTDT>2.0.ZU;2-8
Abstract
Epitaxial metastable (GaAs)(1-x)(Ge-2)(x) thin films throughout most of the full compositional x range were studied by Raman scattering. From the feat ures observed in the compositional dependence of the ratio Gamma(a)/Gamma(b ) of the LO-like mode and that between the integrated intensities of the fo rbidden TO-like mode and of the allowed LO-like mode, we get direct evidenc e for the zincblende to diamond structural transition, which is observed to occur at x approximate to 0.35. Results are in good agreement with X-ray d iffraction data. (C) 1999 Elsevier Science Ltd. Ail rights reserved.