Raman scattering from GaSe1−xTex |
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| Authors: | GB Abdullaev KR Allakhverdiev SS Babaev EYu Salaev MM Tagyev LK Vodopyanov LV Golubev |
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| Institution: | 1. The Institute of Physics Academy Sciences of the Azerbaijan SSR, Baku, USSR;2. Lebedev Institute of Physics Ac. Sci. USSR, Moscow, USSR |
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| Abstract: | The long-wavelength optical phonons of the layer GaSe1?xTex have been investigated at room temperature by means of Raman scattering spectroscopy. The spectra of the Bridgman grown crystals were excited with the 1,06 μm line of the continuously operated YAG:Nd3+ laser. Detailed study of the Raman spectra of GaSe1?xTex solid solutions showed that there is an abrupt change in the frequency-composition dependences for all observed modes. It is shown, that a phase transition from hexagonal ?-GaSe to monoclinic GaTe in GaSe1?xTex solid solutions takes place in the composition range 0.27 ? × ? 0.72. Only one mode behaviour of the optical phonons was observed in GaSe1?xTex system. |
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