[en] Resonant Raman scattering is investigated around the fundamental edge E0 in Ga/sub 1-x/In/sub x/P solid solutions. The strong enhancements of the 'forbidden' LO-like modes are explained by a Froehlich intraband interaction and lead to replica of the first-order spectra. The non-homogeneous activation of the one-phonon density of states and the unusual sharp enhancements of LA-like modes are interpreted as due to structural disorder effects. Local chalcopyrite arrangements are suggested. (author)
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