Chiral charge order in the topological kagome superconductor RbV<sub>3</sub>Sb<sub>5</sub>

ORAL

Abstract

Superconductors with kagome lattices have been identified for over 40 years, with a superconducting transition temperature Tc up to 7 K. Recently, certain kagome superconductors have been found to exhibit an exotic charge order, which intertwines with superconductivity and persists to a temperature being one order of magnitude higher than Tc. In this work, we use scanning tunneling microscopy to study the charge order in kagome superconductor RbV3Sb5. We observe both a 2 × 2 chiral charge order and nematic surface superlattices (predominantly 1 × 4). We find that the 2 × 2 charge order exhibits intrinsic chirality with magnetic field tunability. Defects can scatter electrons to introduce standing waves, which couple with the charge order to cause extrinsic effects. While the chiral charge order resembles that discovered in KV3Sb5, it further interacts with the nematic surface superlattices that are absent in KV3Sb5 but exist in CsV3Sb5.

*Gordon and Betty Moore Founda- tion [Grants No. GBMF4547 and No. GBMF9461 (M.Z.H.)] and United States Department of Energy (U.S. DOE) under the Basic Energy Sciences program (Grant No. DOE/BES DE-FG- 02-05ER46200).

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Publication: Shumiya, N. et al. Phys. Rev. B 104, 035131

Presenters

  • Nana Shumiya

    • Princeton University

Authors

  • Nana Shumiya

    • Princeton University

  • Md. Shafayat Hossain

    • Princeton University

  • Jia-Xin Yin

    • Princeton University
    • Laboratory for Topological Quantum Matter and Advanced Spectroscopy (B7), Department of Physics, Princeton University, Princeton, New Jersey, USA.

  • Yuxiao Jiang

    • Princeton University

  • Brenden Ortiz

    • University of California, Santa Barbara

  • Youguo Shi

    • Chinese Academy of Sciences
    • Institute of Physics, the Chinese Academy of Sciences
    • Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences
    • Institute of Physics, Chinese Academy of Sciences

  • Hechang Lei

    • Renmin University of China

  • Zurab Guguchia

    • Paul Scherrer Institute

  • Stephen D Wilson

    • University of California, Santa Barbara

  • Zahid M Hasan

    • Princeton University
    • Laboratory for Topological Quantum Matter and Advanced Spectroscopy (B7), Department of Physics, Princeton University, Princeton, New Jersey, USA.