Temperature Studies of Raman Spectra in MnBi2Te4 and MnSb2Te4 Magnetic Topological Insulators

Maksimov, A.A.; Tartakovskii, I.I.; Aliev, Z.S.; Amiraslanov, I.R.; Abdullaev, N.A.; Zverev, V.N.; Jahangirli, Zakir; Sklyadneva, I.; Otrokov, M.M.; Mamedov, NAZİM; Chulkov, Evgueni

doi:10.1134/s0021364023602543

Temperature Studies of Raman Spectra in MnBi2Te4 and MnSb2Te4 Magnetic Topological Insulators

Maksimov A., Tartakovskii I., Aliev Z., Amiraslanov I., Abdullaev N., Zverev V., ...More

JETP Letters, vol.118, no.5, pp.357-362, 2023 (SCI-Expanded)

Publication Type: Article / Article
Volume: 118 Issue: 5
Publication Date: 2023
Doi Number: 10.1134/s0021364023602543
Journal Name: JETP Letters
Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chemical Abstracts Core, INSPEC
Page Numbers: pp.357-362
Open Archive Collection: Article
Azerbaijan State University of Economics (UNEC) Affiliated: Yes

Abstract

Raman spectra of magnetic topological crystalline insulators in a wide temperature range including the magnetic ordering region are studied in detail. The anharmonicity parameters and Grüneisen mode parameters of Raman-active phonons in the studied crystals have been determined. It has been shown that the temperature dependence of the frequency of the A(1)1g (~48 cm–1) phonon in MnBi2Te4 coincides within ±0.1 cm–1 with the standard anharmonic model disregarding the spin–phonon coupling. The polarization dependences of Raman spectra in the MnSb2Te4 crystals indicate that Sb and Mn atoms are strongly mixed in them unlike the isostructural MnBi2Te4 crystals.