STM study of many body zero-energy resonance in kagome Weyl antiferromagnet Mn<sub>3</sub>Sn

ORAL

Abstract

We use scanning tunneling microscopy to elucidate the atomically resolved electronic structure in the strongly correlated kagome Weyl antiferromagnet Mn3Sn. In stark contrast to its broad single-particle electronic structure, we observe a pronounced resonance with a Fano line shape at the Fermi level resembling the many-body Kondo resonance. We find that this resonance does not arise from the step edges or atomic impurities but the intrinsic kagome lattice. Moreover, the resonance is robust against the perturbation of a vector magnetic field, but broadens substantially with increasing temperature, signaling strongly interacting physics. We show that this resonance can be understood as the result of geometrical frustration and strong correlation based on the kagome lattice Hubbard model. Our results point to the emergent many-body resonance behavior in a topological kagome magnet.

*Work at Princeton was supported by the Gordon and Betty Moore Foundation (Grants No. GBMF4547 and No. GBMF9461/Hasan).

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Presenters

  • Songtian Sonia Zhang

    • Princeton University

Authors

  • Songtian Sonia Zhang

    • Princeton University

  • Jiaxin Yin

    • Princeton University
    • Laboratory for Topological Quantum Matter and Spectroscopy, Department of Physics, Princeton University
    • Department of Physics, Princeton University

  • Muhammad Ikhlas

    • Institute for Solid State Physics, University of Tokyo
    • Institute for Solid State physics, University of Tokyo
    • University of Tokyo

  • Nana Shumiya

    • Princeton University

  • Guoqing Chang

    • Princeton University
    • Laboratory for Topological Quantum Matter and Spectroscopy, Department of Physics, Princeton University
    • Nanyang Technological University
    • Department of Physics, Princeton University

  • Rui Wang

    • Department of Physics, Nanjing University

  • Stepan Tsirkin

    • Department of Physics, University of Zurich
    • Department of Physics, University of Zurich (Switzerland)
    • Univ of Zurich
    • Physics, University of Zurich

  • Titus Neupert

    • University of Zurich
    • Universität Zürich
    • Department of Physics, University of Zurich
    • Univ of Zurich
    • Physics, University of Zurich

  • Satoru Nakatsuji

    • Department of Physics and ISSP, University of Tokyo
    • Department of Physics, the University of Tokyo
    • Univ of Tokyo
    • Institute for Solid State Physics, University of Tokyo
    • The Institute for Solid State physics, The Univeristy of Tokyo
    • The Institute for Solid State Physics, The University of Tokyo
    • Institute for Solid State physics, University of Tokyo

  • Zahid Hasan

    • Princeton University
    • Laboratory for Topological Quantum Matter and Spectroscopy, Department of Physics, Princeton University