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Anharmonicity of Lattice Vibrations in Bi2Se3 Single Crystals

  • NONELECTRONIC PROPERTIES OF SEMICONDUCTORS (ATOMIC STRUCTURE, DIFFUSION)
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Abstract

The temperature dependences of the Raman-active frequencies \(E_{g}^{2}\), \(A_{{1g}}^{2}\) in layered Bi2Se3 single crystals are studied. The contribution of the thermal expansion to a temperature variation in the frequencies is determined. The decay of the anisotropy of the elastic properties in layered Bi2Se3 single crystals due to strong spin–orbit coupling is shown. The Gruneisen-mode parameters for phonons \(E_{g}^{2}\) and \(A_{{1g}}^{2}\) are calculated. Systematic features in the dependences of vibrational frequencies on the atomic masses in layered Bi2Te3, Bi2Se3, and Sb2Te3 single crystals are determined.

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ACKNOWLEDGMENTS

This study was supported by the Science Development Foundation of the President of the Azerbaijan Republic (grants no. ЕİF/MQM) /Elm-Tehsil-1-2016-1 (26)-71/16/1 and no. EİF-BGM-3-BRFTF-2+/2017-15/02/1).

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Correspondence to N. A. Abdullayev.

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Translated by A. Kazantsev

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Badalova, Z.I., Abdullayev, N.A., Azhdarov, G.H. et al. Anharmonicity of Lattice Vibrations in Bi2Se3 Single Crystals. Semiconductors 53, 291–295 (2019). https://doi.org/10.1134/S1063782619030035

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  • DOI: https://doi.org/10.1134/S1063782619030035

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