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Quantum oscillations in thin films of antiferromagnetic kagome metal FeSn

ORAL

Abstract

FeSn is an antiferromagnetic metal, consisting of two-dimensional layers of corner-sharing triangles of Fe, separated by honeycomb Sn spacer layers. This geometrical arrangement of Fe atoms, known as the kagome lattice, is predicted to give rise to Dirac fermions and topological flat bands. Recent photoemission and quantum oscillation studies on FeSn bulk single crystals have experimentally confirmed the existence of these features in their electronic structures [1]. Here we report the quantum oscillation studies on thin films of FeSn. The observed oscillation frequency reproduces the previous measurements on FeSn bulk single crystals. Temperature and field-angle dependent oscillation frequencies respectively reveal the scattering timescale and morphology of the observed Fermi pocket. The realization of high quality FeSn thin films offers a promising platform to explore the interplay of magnetism and electronic topology via quantum confinement or electrostatic gating [2].
References:
[1] M. Kang, L. Ye, et al., arXiv:1906.02167 (2019)
[2] H. Inoue, M. Han, et al., Appl. Phys. Lett. 115, 072403 (2019)

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Presenters

  • Minyong Han

    Massachusetts Institute of Technology, Massachusetts Institute of Technology MIT

Authors

  • Minyong Han

    Massachusetts Institute of Technology, Massachusetts Institute of Technology MIT

  • Hisashi Inoue

    Frontier Research Institute of Interdisciplinary Sciences, Tohoku University, Tohoku University, Massachusetts Institute of Technology 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

  • 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

  • Linda Ye

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

  • Takehito Suzuki

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