Structural and optical properties of InSe under pressure |
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| Authors: | U. Schwarz A. R. Goñi K. Syassen A. Cantarero A. Chevy |
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| Affiliation: | 1. Max-Planck-Institut fur Festk?rperforschung , D-7000, Stuttgart 80;2. Facultat de Fisica , Univ. Valencia , E-46100, Burjasot;3. Physique de Milieux Condensés , Université P. et M. Curie , F-75252, Paris |
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| Abstract: | Abstract We have investigated the high pressure behavior of InSe by x-ray powder diffraction and optical measurements. The rhombohedral γ-polytype of InSe (space group R3m) exhibits a strongly anisotropic compressibility characteristic of the layer-type structure. Mode Gruneisen parameters of intralayer modes have been determined by Raman scattering. At 10.3(5) GPa InSe undergoes a phase transition to the rocksalt structure, which remains stable up to at least 30 GPa. Optical reflectivity measurements show the cubic high pressure phase to have metallic character. |
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