Fermi arcs in topological chiral crystals

ORAL

Abstract

The telltale trademarks of a Weyl semimetal are the topologically protected Fermi arc surface states. While these surface states have been demonstrated in conventional Weyl semimetals (for instance, the TaAs family), they should also be present in the recently proposed unconventional Weyl semimetals. However, there is still a lack of candidate materials for experimental exploration. In this talk, we comment on a number of chiral crystals in space group No. 198, as platforms for expanding the list of Fermi arc materials. Notably, RhSi, CoSi, CoGe, RhGe, AlPd, AlPt, BaPtP, and BaPtAs constitute promising candidate materials. Indeed, these compounds should exhibit the longest possible Fermi arcs, spanning across the entire surface Brillouin zone. These predictions are closely tied to the maximally separated 4-fold and 6-fold unconventional chiral fermions that have recently been predicted in this class of compounds. We further comment on experimental progress and the current challenges in using ARPES to observe a chiral Weyl semimetal phase with Fermi arcs in these materials.

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Presenters

  • Tyler Cochran

    Princeton University

Authors

  • Daniel S Sanchez

    Princeton University

  • Guoqing Chang

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

  • Tyler Cochran

    Princeton University

  • Kaustuv Manna

    Max-Planck-Institute for Chemical Physics of Solids , Nöthnitzer Straße-40, 01187 Dresden, Germany, Max-Planck-Institute for Chemical Physics of Solids

  • Benjamin Wieder

    Princeton University, KTH Royal Institute of Technology and Stockholm University, Physics, Princeton University, Department of Physics, Princeton University

  • Shin-Ming Huang

    Physics, National Sun Yat-sen University, National University of Singapore, Department of Physics, National Sun Yat-sen University

  • Ilya Belopolski

    Princeton University

  • Tay-Rong Chang

    National Cheng Kung University, Physics, National Cheng Chung University, Physics, National Cheng Kung University, Tainan, 701, Taiwan, Department of Physics, National Cheng Kung University, Physics, National Tsing Hua University, Physics, National Cheng Kung University

  • Songtian Sonia Zhang

    Department of Physics, Princeton University, Princeton University

  • Suyang Xu

    Department of Physics, Massachusetts Institute of Technology, Massachusetts Institute of Technology, MIT, Physics, MIT, Department of Physics, Massachusetts Institute of Technology, Cambridge

  • Arun Bansil

    Northeastern University, Department of Physics, Northeastern University

  • Claudia Felser

    Max Planck Institute for Chemical Physics of Solids, Max-Planck-Institute for Chemical Physics of Solids , Nöthnitzer Straße-40, 01187 Dresden, Germany, Max-Planck-Institute for Chemical Physics of Solids, Max Planck Institute, Max Planck, Dresden

  • 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

  • M Zahid Hasan

    Princeton University