The effects of coupling Kagome superconductor CsV3Sb5 with a s-wave superconductor

ORAL

Abstract

We report the effects of coupling a Kagome superconductor CsV3Sb5 with an external s-wave superconductor. We prepared nanodevices from exfoliated CsV3Sb5 crystals with niobium (Nb) electrodes (Tc sim 8 K). The proximitized edge mode was manifested as periodic modulations of critical current in the differential resistance spectra dV/dI of the devices at varying applied biases I and fields muH. [1] Surprisingly, the period of modulations exceeded what corresponded to the physical area by a factor of four and remained consistent throughout. Moreover, cuts of the differential resistance spectra at zero bias exhibited antihysteric changes of resistance, a signature of incompatibility between two superconducting condensates probed through edge mode. [2]

**The research was supported by the U.S. Department of Energy (DE- SC0017863), the U.S. National Science Foundation (NSF DMR2011750), and the Gordon and Betty Moore Foundation's Emergent Phenomena in Quantum Systems Initiative through Grants (GBMF9466).

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Publication: [1] W. Wang, S. Kim, M. Liu, F. A. Cevallos, R. J. Cava, N. P. Ong, Evidence for an edge supercurrent in the Weyl superconductor MoTe2. Science 368, 534-537 (2020).
[2] S. Kim, S. Lei, L. Schoop, R. J. Cava, N. P. Ong, Eavesdropping on competing condensates by the edge supercurrent in a Weyl superconductor, https://arxiv.org/abs/2208.00933 (2022)

Presenters

  • Bingzheng Han

    • Princeton University

Authors

  • Bingzheng Han

    • Princeton University

  • Stephan Kim

    • Princeton University

  • N. Phuan Ong

    • Princeton University

  • Ni Ni

    • University of California, Los Angeles
    • University of California, Los Angeles, Los Angeles

  • Tiema Qian

    • University of California, Los Angeles

  • 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

  • Jianjun Ying

    • University of Science and Technology of China