Large Anomalous Hall Current in a Topological Ferromagnetic Van Der Waals Material

ORAL

Abstract

Two-dimensional van der Waals materials have shown interesting spin-related properties and promise for spintronic applications. Up to now, however, most of the studies on vdW materials has been focused on non-magnetic materials because magnetic vdW materials are relatively rare. Here we report the large anomalous Hall effect of a metallic ferromagnetic vdW material Fe3GeTe2, which has the highest Curie temperature of Tc ~ 220 K among FM vdW materials. In this system, large Berry curvature in the momentum space is induced by topological nodal lines, which is protected by crystalline symmetries. This turns out to make Fe3GeTe2 having the largest anomalous Hall angle and anomalous Hall factor among metallic ferromagnets, demonstrating its great potential for various spin and orbital-dependent electronic functionalities.

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Presenters

  • Junho Seo

    • Department of Physics, Pohang University of Science and Technology

Authors

  • Kyoo Kim

    • Max Planck-POSTECH Korea Research Initiative, Pohang University of Science and Technology
    • Korea Foundation for Max Planck POSTECH/Korea Research Initiative
    • Department of Physics, Pohang University of Science and Technology
    • Max Planck-POSTECH/Hsinchu Center

  • Junho Seo

    • Department of Physics, Pohang University of Science and Technology

  • Eunwoo Lee

    • Department of Physics and Astronomy, Seoul National University

  • Jong Mok Ok

    • Department of Physics, Pohang University of Science and Technology

  • Jin Won Lee

    • Department of Physics, Pohang University of Science and Technology

  • Y. J. Jo

    • Kyungpook National University
    • Department of Physics, Kyungpook National University

  • Woun Kang

    • Department of Physics, Ewha Womans University

  • Ji Hoon Shim

    • Chemistry , POSTECH
    • Pohang Univ of Sci & Tech
    • Department of Chemistry, Pohang University of Science and Technology
    • POSTECH

  • Han Woong Yeom

    • Center for Artificial Low Dimensional Electronic Systems, Pohang University of Science and Technology
    • Department of Physics, Pohang University of Science and Technology

  • Byung Min

    • Department of Physics, Pohang University of Science and Technology
    • Physics, POSTECH

  • Bohm-Jung Yang

    • Department of Physics and Astronomy, Seoul National University
    • Seoul National University
    • Seoul Natl Univ
    • Physics, Seoul National University

  • Jun Sung Kim

    • Physics, POSTECH
    • Physics, Pohang Univ of Sci & Tech
    • POSTECH
    • Department of Physics, POSTECH
    • Physics, Postech
    • Department of Physics, Pohang University of Science and Technology
    • Pohang University of Science and Technology