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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.

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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