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Pressure dependence of optical phonons in ZnCdSe alloys

AuthorsCamacho, J.; Cantarero, Andrés; Hernández-Calderón, I.; González Sotos, Luisa
Issue DateFeb-2003
CitationPhysica Status Solidi B 235(2): 432-436 (2003)
AbstractWe report on resonant Raman scattering measurements under hydrostatic pressure and at low temperature on two ZnxCd1–xSe alloy films, which were grown by different epitaxial techniques on GaAs. This ternary alloy exhibits an intermediate (I) mode between the typical transverse (TO) and longitudinal optical (LO) modes of the zinc-blende structure. The shift of the vibrational frequencies of the three modes with pressure is analyzed. The Grüneisen parameters of these three optical modes are determined. Moreover, overtones of the LO modes as well as TO + nLO and I + nLO zone-center phonon combinations are observed.
Description5 páginas, 2 figuras, 2 tablas.-- PACS 62.50.+p, 63.20.Dj, 78.30.Fs, 78.66.Hf.-- et al.
Publisher version (URL)http://dx.doi.org/10.1002/pssb.200301597
Appears in Collections:(IMN-CNM) Artículos
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