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Handedness-dependent quasiparticle interference in the two enantiomers of the topological chiral semimetal PdGa

Author

Listed:
  • Paolo Sessi

    (Max Planck Institute of Microstructure Physics)

  • Feng-Ren Fan

    (Max Planck Institute for Chemical Physics of Solids)

  • Felix Küster

    (Max Planck Institute of Microstructure Physics)

  • Kaustuv Manna

    (Max Planck Institute for Chemical Physics of Solids)

  • Niels B. M. Schröter

    (Swiss Light Source, Paul Scherrer Institute)

  • Jing-Rong Ji

    (Max Planck Institute of Microstructure Physics)

  • Samuel Stolz

    (EMPA, Swiss Federal Laboratories for Materials Science and Technology
    Institute of Condensed Matter Physics, Station 3, EPFL)

  • Jonas A. Krieger

    (Swiss Light Source, Paul Scherrer Institute
    Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute
    Laboratorium für Festkörperphysik, ETH Zurich)

  • Ding Pei

    (University of Oxford)

  • Timur K. Kim

    (Diamond Light Source)

  • Pavel Dudin

    (Diamond Light Source)

  • Cephise Cacho

    (Diamond Light Source)

  • Roland Widmer

    (EMPA, Swiss Federal Laboratories for Materials Science and Technology)

  • Horst Borrmann

    (Max Planck Institute for Chemical Physics of Solids)

  • Wujun Shi

    (ShanghaiTech University)

  • Kai Chang

    (Max Planck Institute of Microstructure Physics
    Beijing Academy of Quantum Information Sciences)

  • Yan Sun

    (Max Planck Institute for Chemical Physics of Solids)

  • Claudia Felser

    (Max Planck Institute for Chemical Physics of Solids)

  • Stuart S. P. Parkin

    (Max Planck Institute of Microstructure Physics)

Abstract

It has recently been proposed that combining chirality with topological band theory results in a totally new class of fermions. Understanding how these unconventional quasiparticles propagate and interact remains largely unexplored so far. Here, we use scanning tunneling microscopy to visualize the electronic properties of the prototypical chiral topological semimetal PdGa. We reveal chiral quantum interference patterns of opposite spiraling directions for the two PdGa enantiomers, a direct manifestation of the change of sign of their Chern number. Additionally, we demonstrate that PdGa remains topologically non-trivial over a large energy range, experimentally detecting Fermi arcs in an energy window of more than 1.6 eV that is symmetrically centered around the Fermi level. These results are a consequence of the deep connection between chirality in real and reciprocal space in this class of materials, and, thereby, establish PdGa as an ideal topological chiral semimetal.

Suggested Citation

  • Paolo Sessi & Feng-Ren Fan & Felix Küster & Kaustuv Manna & Niels B. M. Schröter & Jing-Rong Ji & Samuel Stolz & Jonas A. Krieger & Ding Pei & Timur K. Kim & Pavel Dudin & Cephise Cacho & Roland Wid, 2020. "Handedness-dependent quasiparticle interference in the two enantiomers of the topological chiral semimetal PdGa," Nature Communications, Nature, vol. 11(1), pages 1-7, December.
  • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-17261-x
    DOI: 10.1038/s41467-020-17261-x
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    References listed on IDEAS

    as
    1. G. L. J. A. Rikken & E. Raupach, 1997. "Observation of magneto-chiral dichroism," Nature, Nature, vol. 390(6659), pages 493-494, December.
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    Cited by:

    1. Jonas A. Krieger & Samuel Stolz & Iñigo Robredo & Kaustuv Manna & Emily C. McFarlane & Mihir Date & Banabir Pal & Jiabao Yang & Eduardo B. Guedes & J. Hugo Dil & Craig M. Polley & Mats Leandersson & C, 2024. "Weyl spin-momentum locking in a chiral topological semimetal," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    2. Geng Li & Haitao Yang & Peijie Jiang & Cong Wang & Qiuzhen Cheng & Shangjie Tian & Guangyuan Han & Chengmin Shen & Xiao Lin & Hechang Lei & Wei Ji & Ziqiang Wang & Hong-Jun Gao, 2022. "Chirality locking charge density waves in a chiral crystal," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    3. Federico Balduini & Alan Molinari & Lorenzo Rocchino & Vicky Hasse & Claudia Felser & Marilyne Sousa & Cezar Zota & Heinz Schmid & Adolfo G. Grushin & Bernd Gotsmann, 2024. "Intrinsic negative magnetoresistance from the chiral anomaly of multifold fermions," Nature Communications, Nature, vol. 15(1), pages 1-7, December.

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