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Single Crystal Study of Magnetic Topological Material MnBi<sub>2x</sub>Te<sub>3x+1</sub>.

ORAL

Abstract

MnBi2Te4 has emerged as the first stoichiometric antiferromagnetic topological insulator [1]. In thin flakes, MnBi2Te4 has shown remarkable properties including the quantum anomalous Hall (QAH) effect [2]. We investigate the single crystal growth and transport properties of other members of the MnBi2xTe3x+1 family and find both temperature and low field dependent crossovers from A-type antiferromagnetism to ferromagnetism in MnBi4Te7, suggesting MnBi4Te7 as another candidate for QAH effects in zero external field. We discuss the anomalous Hall response in relation to the magnetic structure, and dependence of the transport properties on angle of the external magnetic field.
[1] M. Otrokov et al., arXiv:1809.07389 (2018). [2] Y. Deng et al., arXiv:1904.11468 (2019).

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Presenters

  • Joshua Wakefield

    Massachusetts Institute of Technology MIT

Authors

  • Joshua Wakefield

    Massachusetts Institute of Technology MIT

  • Takashi Kurumaji

    Department of Physics, Massachusetts Institute of Technology, Massachusetts Institute of Technology MIT

  • Takehito Suzuki

    Department of Physics, Massachusetts Institute of Technology MIT, Massachusetts Institute of Technology, Massachusetts Institute of Technology MIT, Physics, MIT

  • Joseph G Checkelsky

    Department of Physics, Massachusetts Institute of Technology, Department of Physics, Massachusetts Institute of Technology MIT, Massachusetts Institute of Technology, Massachusetts Institute of Technology MIT, Physics, MIT