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 SM ISO690:2012GALLEGO-PARRA, Samuel; GOMIS, Oscar; VILAPLANA, Rosario Isabel; ORTIZ, Henry M; PEREZ-GONZALEZ, Eduardo; LUNA, Ramon; RODRIGUEZ-HERNANDEZ, Placida Rogelio; MUNOZ, Alfonso Gonzalez; URSAKI, Veacheslav; TIGINYANU, Ion; MANJON, Francisco Javier. Vibrational properties of CdGa 2 S 4 at high pressure. In: Journal of Applied Physics. 2019, nr. 11(125), p. 0. ISSN 0021-8979. 10.1063/1.5080503 |
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| Journal of Applied Physics | |
| Numărul 11(125) / 2019 / ISSN 0021-8979 | |
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| DOI: 10.1063/1.5080503 | |
| Pag. 0-0 | |
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Raman scattering measurements have been performed in cadmium digallium sulphide (CdGa 2 S 4 ) with defect chalcopyrite structure up to 25 GPa in order to study its pressure-induced phase transitions. These measurements have been complemented and compared with lattice-dynamics ab initio calculations including the TO-LO splitting at high pressures in order to provide a better assignment of experimental Raman modes. In addition, experimental and theoretical Grüneisen parameters have been reported in order to calculate the molar heat capacity and thermal expansion coefficient of CdGa 2 S 4 . Our measurements provide evidence that CdGa 2 S 4 undergoes an irreversible phase transition above 15 GPa to a Raman-inactive phase, likely with a disordered rock salt structure. Moreover, the Raman spectrum observed on downstroke from 25 GPa to 2 GPa has been attributed to a new phase, tentatively identified as a disordered zinc blende structure, that undergoes a reversible phase transition to the Raman-inactive phase above 10 GPa. |
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| Cuvinte-cheie Cadmium compounds, Calculations, Copper compounds, Crystal lattices, Gallium compounds, Raman scattering, specific heat, Thermal expansion, Zinc sulfide |
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BibTeX Export
@article{ibn_75183,
author = {Gallego-Parra, S. and Gomis, O. and Vilaplana, R. and Ortiz, H. and Perez-Gonzalez, E. and Luna, R. and Rodriguez-Hernandez, P. and Munoz, A. and Ursachi, V.V. and Tighineanu, I.M. and Manjon, F.},
title = {<p>Vibrational properties of CdGa <sub>2</sub> S <sub>4</sub> at high pressure</p>},
journal = {Journal of Applied Physics},
year = {2019},
volume = {125 (11)},
pages = {0-0},
month = {Mar},
abstract = {(EN) <p>Raman scattering measurements have been performed in cadmium digallium sulphide (CdGa <sub>2</sub> S <sub>4</sub> ) with defect chalcopyrite structure up to 25 GPa in order to study its pressure-induced phase transitions. These measurements have been complemented and compared with lattice-dynamics ab initio calculations including the TO-LO splitting at high pressures in order to provide a better assignment of experimental Raman modes. In addition, experimental and theoretical Grüneisen parameters have been reported in order to calculate the molar heat capacity and thermal expansion coefficient of CdGa <sub>2</sub> S <sub>4</sub> . Our measurements provide evidence that CdGa <sub>2</sub> S <sub>4</sub> undergoes an irreversible phase transition above 15 GPa to a Raman-inactive phase, likely with a disordered rock salt structure. Moreover, the Raman spectrum observed on downstroke from 25 GPa to 2 GPa has been attributed to a new phase, tentatively identified as a disordered zinc blende structure, that undergoes a reversible phase transition to the Raman-inactive phase above 10 GPa.</p>},
doi = {10.1063/1.5080503},
url = {https://ibn.idsi.md/vizualizare_articol/75183},
keywords = {Cadmium compounds, Calculations, Copper compounds, Crystal lattices, Gallium compounds, Raman scattering, specific heat, Thermal expansion, Zinc sulfide}
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