Superconductivity in few-layer NbSe<sub>2</sub> grown by molecular beam epitaxy

ORAL

Abstract

Superconductors with strong spin-orbit coupling (SOC) are attractive for generating triplet Cooper pairs and topological superconductivity (TSC). In few-layer NbSe2, strong SOC is reported to give rise to TSC. However, as of date, few-layer NbSe2 is produced mainly through mechanical exfoliation. There is a demand to construct large scale NbSe2 thin films to further enable fabrication of scalable heterostructures that can exhibit the unique properties of TSC. Recent reports show that NbSe2 can be grown on graphene by molecular beam epitaxy (MBE). In contrast, in this talk, we report our progress on few-layer NbSe2 grown on insulating substrates by MBE. The layers are characterized by in-situ reflection high energy electron diffraction (RHEED) and ex-situ Raman spectroscopy. A clear superconducting transition has been observed with the transition temperature (Tc) above 2K. We will discuss correlations between layer quality and the Tc. We will also present our studies regarding the critical field in thin film NbSe2.

*This work is supported by the Startup fund from University of California, Riverside.

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Presenters

  • Cliff Chen

    • Department of Physics and Astronomy, University of California, Riverside, CA 92521, USA
    • University of California, Riverside
    • Physics and Astronomy, UC riverside

Authors

  • Cliff Chen

    • Department of Physics and Astronomy, University of California, Riverside, CA 92521, USA
    • University of California, Riverside
    • Physics and Astronomy, UC riverside

  • Peng Wei

    • University of California, Riverside
    • Phyiscs and Astronomy, UCR
    • Department of Physics and Astronomy, University of California, Riverside, CA 92521, USA
    • Physics and Astronomy, UC riverside