Non-trivial topology and Fermi surface of the kagome superconductor CsV<sub>3</sub>Sb<sub>5</sub> probed by de Haas-van Alphen oscillation

ORAL

Abstract

The Fermi surface of the kagome superconductor CsV3Sb5 was studied using torque magnetometry. Based on electrical resistance and magnetization measurements, this compound displays a charge density wave order at T* = 95 K and superconductivity at Tc = 3.25 K. The torque signal shows clear de Haas-van Alphen (dHvA) oscillation above 20 T with multiple frequencies up to 10 kT. Angular dependence of dHvA oscillation was carried out to investigate the dimensionality of the Fermi surface. Lifshitz-Kosevich analyses for determining the effective mass of charge carriers, as well as Berry phase calculations, will also be discussed.

*Work at WTAMU was funded by the KRC Faculty, Undergrad, and Graduate Research Grants, and the Welch Foundation (Grant No. AE-0025). Work at TcSUH was funded by the U.S. Air Force Office of Scientific Research Grants FA9550-15-1-0236 and FA9550-20-1-0068, the T. L. L. Temple Foundation, the John J. and Rebecca Moores Endowment, and the State of Texas through TcSUH. Work at Hefei National Laboratory for Physical Sciences at the Microscale, USTC is funded by the Strategic Priority Research Program of the Chinese Academy of Sciences (XDB25000000) and the National Natural Science Foundation of China (11888101). Work at NHMFL is funded by NSF Cooperative Agreement No. DMR-1644779 and the State of Florida.

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Presenters

  • Keshav Shrestha

    • West Texas A&M University

Authors

  • Keshav Shrestha

    • West Texas A&M University

  • M. Shi

    • Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, 230026, China

  • Thinh Nguyen

    • Department of Chemistry and Physics, West Texas A&M University, Canyon, Texas 79016, USA

  • Duncan Miertschin

    • Department of Chemistry and Physics, West Texas A&M University, Canyon, Texas 79016, USA

  • K. Fan

    • Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, 230026, China

  • Liangzi Deng

    • University of Houston
    • Department of Physics and Texas Center for Superconductivity, University of Houston

  • David E Graf

    • Florida State University
    • National High Magnetic Field Laboratory
    • National High Magnetic Field Laboratory and Department of Physics, Florida State University

  • Xianhui Chen

    • Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, 230026, China
    • University of Science and Technology of China

  • Ching-Wu W Chu

    • University of Houston
    • Department of Physics and Texas Center for Superconductivity, University of Houston