Transition from 3-dimensional to 2-dimensional Ising superconductivity in few-layer NbSe<sub>2</sub> by proximity effect from van der Waals heterostacking

ORAL

Abstract

The coexistence of superconductivity and spin-orbit coupling in an Ising superconductor has garnered attention in recent times due to its prospect of having topologically non-trivial phases. In this work, we report the observation of Ising superconductivity in a bulk NbSe2 stacked over a monolayer MoS2 which in contrast to earlier reports has advantage in terms of yield, stability, and flexibility for complex device structure. Through systematic and comparative magnetotransport measurement we confirmed the existence of 2D Ising superconductivity in the heterostructure with 3D behavior of the pristine NbSe2. The 2D nature of the superconductivity in the stack was further probed through resistance fluctuation spectroscopy establishing universal BKT type behavior. Moreover, we studied the vortex dynamics of the system in perpendicular magnetic field which shows the influence of monolayer MoS2 in transport characteristics of the heterostructure.

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Presenters

  • Prakiran Baidya

    • Indian Institute of Science Bangalore

Authors

  • Prakiran Baidya

    • Indian Institute of Science Bangalore

  • Divya Sahani

    • Indian Institute of Science

  • Hemanta Kumar K Kundu

    • Weizmann Institute of Science
    • weizmann institute of science
    • Department of Condensed Matter Physics, Braun Center of Sub-Micron Research Weizmann Institute of Science, Israel

  • Simrandeep Kaur

    • Indian Institute of Science

  • Priya Tiwari

    • Indian Institute of Science Bangalore

  • Vivas Bagwe

    • Tata Institute of Fundamental Research

  • John Jesudasan

    • Tata Institute of Fundamental Research, Mumbai, India
    • Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research
    • Tata Institute of Fundamental Research

  • Awadhesh Narayan

    • ETH Zurich

  • Pratap Raychaudhuri

    • Tata Institute of Fundamental Research, Mumbai, India
    • Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research
    • Tata Institute of Fundamental Research

  • Aveek Bid

    • Indian Institute of Science Bangalore