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.

*Experimental and theoretical work at Princeton University was supported by the Gordon and Betty Moore Foundation (GBMF4547/ Hasan) and the United States Department of Energy (US DOE) under the Basic Energy Sciences program (grant number DOE/BES DE-FG-02-05ER46200). The work in Peking University was supported by the National Natural Science Foundation of China No. U1832214, No.11774007, the National Key R&D Program of China (2018YFA0305601) and the strategic Priority Research Program of Chinese Academy of Sciences (XDB28000000).

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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