Anharmonicity of Lattice Vibrations in Bi 2 Se 3 Single Crystals

Badalova Z., Abdullayev N., Azhdarov G., Aliguliyeva K. V., Gahramanov S. S., Nemov S., ...More

Semiconductors, vol.53, no.3, pp.291-295, 2019 (SCI-Expanded, Scopus) identifier identifier

  • Publication Type: Article / Article
  • Volume: 53 Issue: 3
  • Publication Date: 2019
  • Doi Number: 10.1134/s1063782619030035
  • Journal Name: Semiconductors
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.291-295
  • Open Archive Collection: Article
  • Azerbaijan State University of Economics (UNEC) Affiliated: Yes

Abstract

Abstract: The temperature dependences of the Raman-active frequencies E g 2 A1g in layered Bi 2 Se 3 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 Bi 2 Se 3 single crystals due to strong spin–orbit coupling is shown. The Gruneisen-mode parameters for phonons E g 2 are calculated. Systematic features in the dependences of vibrational frequencies on the atomic masses in layered Bi 2 Te 3 , Bi 2 Se 3 , and Sb 2 Te 3 single crystals are determined.