Abstract
The nonresonant spectra of the Raman scattering in Zn1−x CdxSe crystals (0≤ x≤1) are investigated. The mode doublet was found to gradually shift with increasing x from the longitudinal-transverse frequencies of ZnSe to the longitudinal-transverse frequencies of CdSe. Furthermore, an additional branch of weak modes was observed between the doublet components. The frequencies of this branch are shown to correspond to the frequencies of the cadmium impurity vibrations in the ZnSe lattice at x=0 and the zinc impurity vibrations in the CdSe lattice at x=1. The concentration dependences of the modes and atomic displacements are analyzed by using the isodisplacement model that includes the interaction between ZnSe-and CdSe-like vibrations. It is concluded that a one-mode behavior with the formation of an additional weak branch in the longitudinal-transverse splitting region is characteristic of this system.
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Translated from Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 126, No. 4, 2004, pp. 866–873.
Original Russian Text Copyright © 2004 by Vinogradov, Mavrin, Vodop’yanov.
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Vinogradov, E.A., Mavrin, B.N. & Vodop’yanov, L.K. Raman scattering and optical normal vibrations of the Zn1−x CdxSe crystal lattice. J. Exp. Theor. Phys. 99, 749–755 (2004). https://doi.org/10.1134/1.1826166
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DOI: https://doi.org/10.1134/1.1826166