In this work we extend to mixed anion pseudoternary AGa2(SxSe1-x)4 defective compounds the study of mixed crystal lattice dynamics. Anion cross substitution affects the spectral distribution to a deeper extent than cation substitution. Nonresonant Raman scattering gives evidence of mode-mode coupling of A symmetry modes and of unusual two mode behaviour of Γ zincblende derived highest frequency LO modes. In resonant conditions the breathing modes seem to antiresonate, while the higher frequency LO modes show Fröhlich activated forbidden resonant Raman scattering.
Raman investigation of lattice dynamics of pseudoternary mixed crystals / Lottici, Pier Paolo; Parisini, Antonella; Razzetti, C.. - In: PROGRESS IN CRYSTAL GROWTH AND CHARACTERIZATION. - ISSN 0146-3535. - 10:(1985), pp. 289-296. [10.1016/0146-3535(84)90047-9]
Raman investigation of lattice dynamics of pseudoternary mixed crystals
LOTTICI, Pier Paolo;PARISINI, Antonella;
1985-01-01
Abstract
In this work we extend to mixed anion pseudoternary AGa2(SxSe1-x)4 defective compounds the study of mixed crystal lattice dynamics. Anion cross substitution affects the spectral distribution to a deeper extent than cation substitution. Nonresonant Raman scattering gives evidence of mode-mode coupling of A symmetry modes and of unusual two mode behaviour of Γ zincblende derived highest frequency LO modes. In resonant conditions the breathing modes seem to antiresonate, while the higher frequency LO modes show Fröhlich activated forbidden resonant Raman scattering.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
