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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.

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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