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Phonons in Mixed Cd x Zn 1− x S Semiconductors
Author(s) -
Lisitsa M. P.,
Valakh M. Ya.,
Konovets N. K.
Publication year - 1969
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.19690340127
Subject(s) - phonon , brillouin zone , wurtzite crystal structure , condensed matter physics , semiconductor , lattice (music) , spectrum (functional analysis) , materials science , chemistry , physics , optics , quantum mechanics , diffraction , acoustics
The vibrational spectrum of Cd x Zn 1− x crystals has been studied experimentally by optical methods. The results for limiting cases of pure CdS and ZnS are compared with theoretical calculations of wurtzite lattice dynamics. A detailed picture of the phonon spectrum reconstruction of mixed crystals is established as a function of the components composition. The character of the change of optical vibration frequencies at the centre of the Brillouin zone is qualitatively similar to that at its boundary, differing from the type known for the other A II B VI mixed crystals. Further an analysis of the simple linear chain model is made in order to explain the dependence of the qualitative picture of the phonon spectrum reconstruction on the masses of the substituted components.