Vector field STM study on transition metal based kagome magnet

ORAL

Abstract

We recently found that the kagome magnet can have giant spin-orbit tunability (Nature 562, 91–95 (2018)). We use STM/S to elucidate the atomically resolved electronic states and their magnetic response in another transition metal based kagome magnet. We determine the chemical nature of the surface by atomic imaging of the native defects and surface step edges. On different surface terminations, we have observed different types of tunneling spectra, which corresponds well with our first principle calculation. Surprisingly, we find the tunneling signal has systematic magnetic field response, demonstrating an intriguing coupling of electronic structure and magnetism in a frustrated setting. We further discuss the connection of these results with the topological fermions and Berry phase theory.

*Work at Princeton was supported by the US DOE under Basic Energy Sciences programme (grant number DOE/BES DE-FG-02-05ER46200) and the Gordon and Betty Moore Foundation (GBMF4547/ Hasan)

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Presenters

  • Jiaxin Yin

    • Department of Physics, Princeton University
    • Princeton University

Authors

  • Jiaxin Yin

    • Department of Physics, Princeton University
    • Princeton University

  • Songtian Sonia Zhang

    • Department of Physics, Princeton University
    • Princeton University

  • Guoqing Chang

    • Department of Physics, Princeton University
    • Princeton University
    • Physics, Princeton U.

  • Zurab Guguchia

    • Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute
    • Paul Scherrer Institut
    • Princeton University
    • Columbia University
    • Brookhaven National Laboratory

  • Shuang Jia

    • International Center for Quantum Materials, Peking University
    • Peking University, China
    • Physics, Peking University
    • Peking University
    • International Center for Quantum Materials, School of Physics, Peking University

  • Hechang Lei

    • Physics Department, Renmin University of China
    • Brookhaven National Laboratory
    • Renmin University of China
    • Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory

  • Titus Neupert

    • University of Zurich
    • Department of Physics, University of Zurich

  • Ziqiang Wang

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

  • Hsin Lin

    • Academia Sinica
    • Institute of Physics, Academia Sinica
    • Physics, Academia Sinica, Taipei 11529, Taiwan
    • Institute of Physics, Academia Sinica, Taipei 11529, Taiwan
    • Physics, Academia Sinica
    • Department of Physics, National University of Singapore
    • National University of Singapore
    • Academia Sinica, Taipei, Taiwan

  • Zahid Hasan

    • Department of Physics, Princeton University
    • Princeton University
    • Laboratory for Topological Quantum Matter & Advanced Spectroscopy, Princeton University
    • Physics, Princeton U.