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<p>Raman spectra of MnBi<sub>2</sub>Te<sub>4</sub> magnetic topological insulator crystals have been experimentally studied at temperatures from liquid helium to room temperature. Features of the behavior of a phonon with the <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(A_{{1g}}^{2}\)</EquationSource> <!--JETPLet2660084Maksimov-m1--> </InlineEquation> symmetry in MnBi<sub>2</sub>Te<sub>4</sub> at temperatures below and above the antiferromagnetic phase transition temperature has been discovered and studied in detail for the first time. These features demonstrate the strong influence of the spin–phonon interaction with the magnetic degrees of freedom of the topological insulator on the frequency and intensity of the phonon.</p>

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Raman Scattering and Spin–Phonon Coupling in Crystals of the Magnetic Topological Insulator MnBi2Te4

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月1日

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  • A. A. Maksimov,
  • I. I. Tartakovskii,
  • N. A. Abdullaev,
  • Z. S. Aliev,
  • N. T. Mamedov

摘要

Raman spectra of MnBi2Te4 magnetic topological insulator crystals have been experimentally studied at temperatures from liquid helium to room temperature. Features of the behavior of a phonon with the \(A_{{1g}}^{2}\) symmetry in MnBi2Te4 at temperatures below and above the antiferromagnetic phase transition temperature has been discovered and studied in detail for the first time. These features demonstrate the strong influence of the spin–phonon interaction with the magnetic degrees of freedom of the topological insulator on the frequency and intensity of the phonon.