Influence of magnetic ordering on the optical response of the antiferromagnetic topological insulator MnBi2Te4

M. Köpf, J. Ebad-Allah, S. H. Lee, Z. Q. Mao, C. A. Kuntscher

Research output: Contribution to journalArticlepeer-review

Abstract

The layered topological insulator MnBi2Te4 has attracted great interest recently due to its intrinsic antiferromagnetic order, potentially hosting various topological phases. By temperature-dependent infrared spectroscopy over a broad frequency range, we studied the changes in the optical conductivity of MnBi2Te4 at the magnetic ordering temperature. The temperature dependence of several optical parameters reveals an anomaly at the magnetic phase transition, which suggests the correlation between the bulk electronic band structure and the magnetism. We relate our findings to recent reports on the temperature dependence of the electronic band structure of MnBi2Te4.

Original languageEnglish (US)
Article number165139
JournalPhysical Review B
Volume102
Issue number16
DOIs
StatePublished - Oct 21 2020

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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