Shubnikov-de Haas oscillations in the ferromagnetic Weyl semimetal Co<sub>3</sub>Sn<sub>2</sub>S<sub>2</sub>

ORAL

Abstract

We report the observation of Shubnikov-de Haas oscillations in high quality single crystals of the ferromagnetic Weyl semimetal Co3Sn2S2 up to 45 T. The Fermi surfaces resolved in our experiments are three-dimensional and reflect an underlying trigonal crystallographic symmetry. Combined with density functional theoretical calculations, we identify that the majority of the Fermi surfaces in the system -- of both electron and hole nature -- arise from the strong energy dispersion of the mirror-protected nodal loops prior to the inclusion of spin-orbit coupling. We discuss the dependence of the Fermi surface on the ferromagnetic moment orientation. We anticipate our results to shed light on the interplay between the ferromagnetic order and topological electronic states in Co3Sn2S2.

*A portion of this work was performed at the National High Magnetic Field Laboratory, which is supported by the National Science Foundation Cooperative Agreement No. DMR-1644779 and the State of Florida. We acknowledge support from Gordon and Betty Moore Foundation through GBMF9070 and from STC Center for Integrated Quantum Materials, NSF grant number DMR-1231319. We acknowledge support from the Alexander von Humboldt Foundation and from the Deutsche Forschungsgemeinschaft (DFG, German Research Foun- dation) under Germany's Excellence Strategy through the Wu ̈rzburg-Dresden Cluster of Excellence on Com- plexity and Topology in Quantum Matter – ct.qmat (EXC 2147, project-id 390858490)

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Publication: A paper with the same title and authors is being prepared.

Presenters

  • Jorge I Facio

    • IFW - Dresden

Authors

  • Jorge I Facio

    • IFW - Dresden

  • Linda Ye

    • Stanford Univ
    • Stanford University
    • Massachusetts Institute of Technology MI

  • Madhav P Ghimire

    • Tribhuvan University, Kathmandu, Nepal
    • Tribhuvan University
    • Central Department of Physics, Tribhuvan University, Kirtipur 44613, Kathmandu, Nepal

  • Mun K Chan

    • Los Alamos National Laboratory

  • Jhih-Shih You

    • National Taiwan Normal University
    • Department of Physics, National Taiwan Normal University
    • National Taiwan Normal University, Taipei 11677, Taiwan
    • Department of Physics, National Taiwan Normal University,

  • David C Bell

    • Harvard University

  • Manuel Richter

    • Leibniz IFW
    • Leibniz IFW-Dresden
    • IFW - Dresden

  • Jeroen van den Brink

    • Institute for Theoretical Solid State Physics, Leibniz IFW Dresden, Dresden, Germany, Institute for Theoretical Physics, TU Dresden, Dresden, Germany
    • IFW - Dresden

  • Joseph G Checkelsky

    • Massachusetts Institute of Technology MI
    • Massachusetts Institute of Technology