Raman study of the lattice vibrations of a ternary alloy AlxIn1−xAs on InP substrate over the whole range of compositions is reported. The Raman spectra show a two-mode-type behavior involving AlAs- and InAs-like longitudinal optical-phonon modes. The frequency of the AlAs-like mode strongly depends on the composition, but frequency of the InAs-like mode is almost independent of composition. A disorder-induced scattering by acoustic vibrations is also observed.
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Emura et al. (1987) studied this question.
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