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Discovery of a quantum topological kagome magnet by vector magnetic field-based STM

ORAL

Abstract

Kagome magnets have been known to exhibit rich topologically based vector magnetic field responses, including giant and anisotropic spin-orbit tunability (J.-X. Yin et al. Nature 562, 91-95 (2018)) and negative flatband magnetism (J.-X. Yin et al. Nature Physics 15, 443-448 (2019)). Here we use the same vector magnetic field-based STM technique combined with Berry curvature sensitive transport to discover a new quantum topological kagome magnet. We observe striking Landau quantization of the kagome lattice, dissipationless chiral edge state, and quantum-limit Hall response. These combined results point to the realization of a high-temperature quantum topological kagome magnet.

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Presenters

  • Jiaxin Yin

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

Authors

  • Jiaxin Yin

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

  • Wenlong Ma

    Peking Univ, School of Physics, Peking University

  • Songtian Sonia Zhang

    Princeton University, Physics, Princeton University

  • Tyler Cochran

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

  • Xitong Xu

    Peking Univ, School of Physics, Peking University, Peking University

  • Nana Shumiya

    Princeton University, Physics, Princeton University

  • Biao Lian

    Princeton Center for Theoretical Science, Princeton University, Princeton University, Physics, Princeton University

  • Zhida Song

    Chinese Academy of Sciences,Institute of Physics, Princeton University, Department of Physics, Princeton University, Physics, Princeton University, Department of Physics, Princeton university, Physics department, Princeton University

  • Kun Jiang

    Boston College, Institute of Physics, Chinese Academy of Sciences, Physics, Boston College, Department of Physics, Boston College

  • Tay-Rong Chang

    National Cheng Kung University, Physics, National Cheng Kung University, Department of Physics, National Cheng Kung University, National Cheng Kung University, Taiwan

  • Titus Neupert

    Univ of Zurich, University of Zurich, Department of Physics, University of Zurich, Physics, University of Zurich

  • Ziqiang Wang

    Boston College, Department of Physics, Boston College, Physics, Boston College

  • Nan Yao

    Princeton University, Physics, Princeton University

  • Shuang Jia

    Peking University, International Center for Quantum Materials, Peking Univ, School of Physics, Peking University, Peking University, Department of physics, ICQM, Peking University

  • Zahid Hasan

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