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Lattice Vibrations of CuGaSe 2 , CuInSe 2 Ternary Compounds, and CuGa x In 1− x Se 2 Solid Solutions
Author(s) -
Bodnar I. V.,
Smirnova G. F.,
Smirnova T. V.,
Aleshchenko Yu. A.,
Vodopyanov L. K.
Publication year - 1988
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.2221450108
Subject(s) - raman spectroscopy , ternary operation , molecular vibration , lattice vibration , solid solution , lattice (music) , chemistry , vibration , reflection (computer programming) , spectral line , crystallography , materials science , molecular physics , condensed matter physics , phonon , physics , optics , organic chemistry , quantum mechanics , astronomy , computer science , acoustics , programming language
On the basis of IR reflection, transmission, and Raman spectra the frequencies of the vibrational modes of CuGaSe 2 , CuInSe 2 , and CuGa x In 1− x Se 2 are obtained and identified. It is shown that the lattice vibrations of the solid solutions display mixed type behaviour. In the frequency range ω > 200 cm −1 the vibrational modes show two‐mode behaviour. Two relatively independent bands in this range are due to vibrations of GaSe atoms and InSe, respectively, in antiphase. The vibrational modes in the low frequency region (ω < 200 cm −1 ) display one‐mode behaviour.