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Título: | Dynamics of the BiTeI lattice at high pressures |
Autor: | Ponosov, Yu S.; Kuznetsova, Tatyana V.; Tereshchenko, Oleg E.; Kokh, Konstantin A.; Chulkov, Eugene V. CSIC ORCID | Fecha de publicación: | 2014 | Editor: | Springer Nature | Citación: | JETP Letters 98(9): 557-561 (2014) | Resumen: | Raman measurements of the phonon spectrum of BiTeI at pressures of up to 20 GPa have been performed. A decrease in the linewidth of E2 vibration by almost a factor of 2 with an increase in the pressure to 3 GPa has been detected. The frequencies of all four Raman active modes increase monotonically with the pressure. These lines are observed in spectra up to ∼8 GPa. Sharp change in the spectrum occurs at pressures of 8-9 GPa, indicating a transition to the high-pressure phase, which holds up to 20 GPa. This transition is reversible and hardly has any hysteresis. A sample in the high-pressure phase is single crystal. © 2013 Pleiades Publishing, Inc. | URI: | http://hdl.handle.net/10261/102600 | DOI: | 10.1134/S0021364013220074 | Identificadores: | doi: 10.1134/S0021364013220074 issn: 0021-3640 e-issn: 1090-6487 |
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