A Fermi Arc Ladder Reveals Higher-Fold Topology

ORAL

Abstract

While topological insulators and Weyl semimetals have been major topics within materials research, theoretical and experimental focus has begun to shift to more exotic forms of topological quantum matter. Higher-fold topology is one example, where the low-energy description goes beyond Standard Model analogs. Despite intensive experimental studies, conclusive evidence remains elusive for the topological nature of higher-fold chiral fermions. In this work, we leverage a photoemission spectroscopy probe to discover the multi-gap topology of a higher-fold chiral fermion material [1]. We identify two sets of chiral surface states. These Fermi arcs exhibit an emergent ladder structure in energy-momentum space, unprecedented in topological materials. Furthermore, we determine the multi-gap chiral charge C=(2,2). Our results provide a general framework to explore future complex topological materials.

[1] Preprint at arXiv:2004.11365.

*Work at Princeton University and Princeton-led synchrotron based ARPES measurements were supported by the United States Department of Energy (US DOE) under the Basic Energy Sciences program (grant number DOE/BES DE-FG-02-05ER46200). T.A.C. was supported by the National Science Foundation Graduate Research Fellowship Program under Grant No.DGE-1656466.

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Presenters

  • Tyler Cochran

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

Authors

  • Tyler Cochran

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

  • Ilya Belopolski

    • Princeton University
    • Laboratory for Topological Quantum Matter and Spectroscopy, Department of Physics, Princeton University
    • Department of Physics, Princeton University
    • Center for Emergent Matter Science, RIKEN

  • Daniel S Sanchez

    • Princeton University

  • Kaustuv Manna

    • Max Planck Institute for Chemical Physics of Solids
    • Max Planck Institute for Chemical Physics of Solids,

  • Zijia Cheng

    • Princeton University
    • Department of Physics, Princeton University

  • Xian Yang

    • Princeton University
    • Department of Physics, Princeton University

  • Daniel Multer

    • Princeton University
    • Department of Physics, Princeton University

  • Jiaxin Yin

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

  • Songtian Zhang

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

  • Nana Shumiya

    • Princeton University

  • Jaime A Sanchez

    • Helmholtz-Zentrum Berlin fur Materialien und Energie

  • Patrick Le Fèvre

    • Synchrotron SOLEIL

  • François bertran

    • Synchrotron SOLEIL

  • Vladimir N. Strocov

    • Swiss Light Source
    • Paul Scherrer Institut

  • Takayuki Muro

    • JASRI
    • Japan Synchrotron Radiation Research Institute (JASRI)

  • Jonathan Denlinger

    • Materials Sciences Division, Lawrence Berkeley National Laboratory
    • Lawrence Berkeley National Laboratory
    • Advanced Light Source
    • Advanced Light Source, LBNL
    • Advanced light source
    • Advanced Light Source, Lawrence Berkeley National Lab

  • Claudia Felser

    • Max Planck Institute for Chemical Physics of Solids
    • Max Planck Institute for the Chemical Physics of Solids
    • Solid State Chemistry, Max Planck Institute for Chemical Physics of Solids
    • Max Planck Institute, Dresden, Germany
    • Max Planck, Dresden
    • Max Planck Institute for Chemical Physics of Solids, 01187 Dresden
    • Max Planck Institute for Chemical Physics of Solids,

  • Hsin Lin

    • Institute of Physics, Academia Sinica
    • Academia Sinica
    • Institute of Physics, Academia Sinica, Taipei
    • Institute of Physics, Academia Sinica, Taiwan
    • Physics, Academia Sinica

  • Zahid Hasan

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