Absence of Correlation Between Carrier Type and Magnetic Properties of MnBi<sub>2</sub>Te<sub>4</sub>

ORAL

Abstract

MnBi2Te4 is an intrinsic magnetic topological material; this makes MnBi2Te4 ideal for exotic quantum phenomena, such as the anomalous Hall effect, axion electrodynamics, and anomalous Nernst effect [1]. In addition, MnBi2Te4 is applicable to detect and manipulate the magnetization in data storage devices using various magneto-electrical routes. Here we investigate the magnetic properties of MnBi2Te4 samples with n-type and p-type carriers grown by molecular beam epitaxy. We used SQUID magnetometry to measure the magnetization as a function of field and temperature and to extract the magnetic properties MS and TC. When compared to the carrier type of the samples, we find that there is no correlation between the carrier type and the magnetic properties MS, and TC, unlike in the case of magnetic semiconductors. This independence indicates that MnBi2Te4 becomes magnetic as a result of a direct exchange interaction.
[1] 2020 Science 367, 895, 2020 Nat. Mater. 19, 522

*Supported by NSF DMR-1905277

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Presenters

  • Kerrie Koller

    • Department of Chemistry and Physics, Saint Mary's College
    • Department of Chemistry and Physics, Saint Mary's College (Indiana)

Authors

  • Kerrie Koller

    • Department of Chemistry and Physics, Saint Mary's College
    • Department of Chemistry and Physics, Saint Mary's College (Indiana)

  • Seul-Ki Bac

    • Department of Physics, University of Notre Dame
    • University of Notre Dame

  • Xinyu Liu

    • University of Notre Dame
    • Physics, University of Notre Dame
    • Department of Physics, University of Notre Dame

  • Logan Riney

    • University of Notre Dame
    • Physics, University of Notre Dame
    • Department of Physics, University of Notre Dame

  • Jiashu Wang

    • University of Notre Dame
    • Physics, University of Notre Dame
    • Department of Physics, University of Notre Dame

  • William Powers

    • Department of Physics, University of Notre Dame

  • Maksym Zhukovskyi

    • Notre Dame Integrated Imaging Facility, University of Notre Dame
    • University of Notre Dame

  • Tatyana Orlova

    • Notre Dame Integrated Imaging Facility, University of Notre Dame
    • University of Notre Dame

  • Malgorzata Dobrowolska

    • University of Notre Dame
    • Physics, University of Notre Dame
    • Department of Physics, University of Notre Dame

  • Jacek Furdyna

    • Department of Physics, University of Notre Dame
    • University of Notre Dame

  • Badih A Assaf

    • University of Notre Dame
    • Physics, University of Notre Dame
    • Department of Physics, University of Notre Dame