High field quantum oscillation studies of Dirac electrons in iron-based kagome lattice metals

ORAL

Abstract

The kagome lattice has long been theoretically known to harbor Dirac dispersions together with a dispersionless (flat) band. The relevance of the kagome lattice model in the context of electronic structures has recently been established in a class of binary hexagonal iron stannides, where Dirac dispersions derived from Fe 3d electrons are observed at Brillouin zone corners in photoemission studies [1,2]. Here we report high magnetic field quantum oscillation studies of Dirac electrons in these iron-based kagome metals including ferromagnetic Fe3Sn2 [3] and antiferromagnetic FeSn [2]. In Fe3Sn2 we observe a doublet of quasi-2D bulk Dirac electrons while a single bulk Dirac pocket is identified in FeSn. We further discuss the impact of crystallographic stacking and magnetic order on the Dirac electronic states in Fe3Sn2 and FeSn. References: [1] L. Ye, M. Kang et al., Nature 555 638-642 (2018). [2] M. Kang, L. Ye et al., arXiv/1906.02167, Nat. Mater. (in press). [3] L. Ye et al., Nat. Comm. 10, 4870 (2019).

*We acknowledge support by support by the STC Center for Integrated Quantum Materials, NSF grant number DMR-1231319. Work perfomed at NHMFL is supported by the NSF Cooperative Agreement No.DMR-1157490 and DMR-1644779, the State of Florida and the U.S. Department of Energy.

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Presenters

  • Linda Ye

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

Authors

  • Linda Ye

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

  • Min Gu Kang

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

  • Mun K. Chan

    • Los Alamos National Laboratory
    • Pulse Field Facility, National High Magnetic Field Laboratory, Los Alamos National Laboratory
    • National High Magnetic Field Laboratory, LANL
    • University of Minnesota
    • NHMFL

  • Ross McDonald

    • Los Alamos National Laboratory
    • physics, los alamos national lab
    • NHMFL-PFF, Los Alamos National Laboratory
    • Los Alamos Natl. Lab
    • Los Alamos Natl Lab
    • National High Magnetic Field Laboratory, LANL

  • David E Graf

    • Florida State University
    • National High Magnetic Field Laboratory, Florida State University
    • Department of Physics, National High Magnetic Field Laboratory, Florida State University, Florida, USA
    • National High Magnetic Field Laboratory
    • National High Magnetic Field Lab, Florida State University
    • National High Magnetic Field Laboratory and Department of Physics, Florida State University
    • Florida State Univ
    • Natl High Magnetic Field Lab
    • National High Magnetic Field Lab, Tallahassee, FL 32310, USA
    • National High Magnetic Field Laboratory, 1800 E. Paul Dirac Drive, Tallahassee, FL 32310, USA
    • National High Magnetic Field Laboratory-Florida State University
    • National High Magnetic Field Laboratory, Tallahassee, FL
    • NHMFL, Florida State University
    • NHMFL

  • Abraham L Levitan

    • Massachusetts Institute of Technology MIT
    • Massachusetts Institute of Technology

  • Minyong Han

    • Massachusetts Institute of Technology
    • Massachusetts Institute of Technology MIT

  • David Charles Bell

    • School of Engineering and Applied Sciences, Harvard University
    • Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University
    • Harvard University

  • Madhav Prasad Ghimire

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

  • Shiang Fang

    • Harvard University
    • Department of Physics and Astronomy, Rutgers University
    • Harvard
    • Department of Physics, Harvard University
    • Physics, Harvard University

  • Jhih-Shih You

    • IFW Dresden

  • Jorge I. Facio

    • IFW Dresden

  • Efthimios Kaxiras

    • Harvard University
    • Department of Physics, Harvard University

  • Jeroen Van den Brink

    • Leibniz Institute for Solid State and Materials Research, IFW Dresden, D-01171 Dresden, Germany
    • Leibniz Institute for Solid State and Materials Research, 01069 Dresden, Germany
    • IFW - Dresden
    • IFW Dresden, Germany
    • IFW Dresden

  • Riccardo Comin

    • Massachusetts Institute of Technology MIT
    • Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
    • Massachusetts Institute of Technology
    • Department of Physics, Massachusetts Institute of Technology
    • 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