Planar Schottky tunneling spectroscopy of antiferromagnetic kagome metal FeSn

ORAL

Abstract

The kagome lattice has long been regarded as a conceptual lattice network that connects its characteristic atomic arrangement to unusual singularities in the electronic structure. The recent discovery of Dirac dispersions and flat bands in transition metal stannide T-Sn (T = Fe, Co) kagome compounds has brought the long-sought theoretical framework into realistic material systems [1]. Here we report the surface-sensitive planar tunneling spectroscopy of antiferromagnetic kagome metal FeSn across a Schottky heterointerface with an n-type degenerate semiconductor [2, 3]. We present measurements across a wide range of temperatures, barrier widths, and magnetic fields probing the underlying electronic structure. We also discuss the relevance of our results to potential applications for spintronic devices.
References:
[1] M. Kang, L. Ye et al., Nat. Mater. 19, 163 (2020)
[2] H. Inoue, M. Han et al., Appl. Phys. Lett. 115, 072403 (2019)
[3] M. Han, H. Inoue et al., in preparation (2020)

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Presenters

  • Minyong Han

    • Massachusetts Institute of Technology

Authors

  • Minyong Han

    • Massachusetts Institute of Technology

  • Hisashi Inoue

    • National Institute of Advanced Industrial Science and Technology (AIST)

  • Shiang Fang

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

  • Caolan John

    • University of California, Berkeley
    • Massachusetts Institute of Technology

  • Linda Ye

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

  • Mun K. Chan

    • National High Magnetic Field Laboratory (LANL)

  • David E Graf

    • National High Magnetic Field Laboratory
    • Florida State University
    • National High Magnetic Field Lab, Florida State University
    • National High Magnetic Field Laboratory, Tallahassee and Florida State University
    • National High Magnetic Field Laboratory, Florida State University
    • National High Magnetic Field Laboratory (FSU)
    • Department of Physics, Florida State University
    • National High Magnetic Field Laboratory and Department of Physics, Florida State University
    • National High Magnetic Field Lab
    • National High Magnetic Field Laboratory, Tallahassee, FL
    • CMS, National High Magnetic Laboratory

  • Takehito Suzuki

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

  • Madhav Prasad Ghimire

    • Tribhuvan University

  • Won Joon Cho

    • Samsung Advanced Institute of Technology (SAIT)

  • Efthimios Kaxiras

    • Harvard University
    • Department of Physics, Harvard University
    • Physics, Harvard University

  • Joseph Checkelsky

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