Superconductivity in twisted transition metal dichalcogenide homobilayers

ORAL

Abstract

The ability of engineering long-period superlattices using twisted van der Waals interfaces has been utilized to explore emergent physical phenomena in 2-dimensional (2D) systems. In homojunctions of 2D atomic layers, at small twist angles, the single particle density of states can be enhanced resulting in the flat band condition. In this presentation, we will discuss Fermi level instabilities due to the developing of a singular density of states in the partially filled moire flat band. We will discuss our recent experimental development of observation of superconductivity in twisted homojunction of semiconducting transition metal dichalcogenide (TMD). Two monolayers of TMDs were stacked together with small twisting angles between them, exhibiting a zero-resistance state at low temperatures below 1 K which critical magnetic field ~ 0.1 T. The detailed nature of this superconducting state will be discussed.

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Presenters

  • Luis Jauregui

    • Physics, Harvard University
    • Harvard University

Authors

  • Luis Jauregui

    • Physics, Harvard University
    • Harvard University

  • Kateryna Pistunova

    • Physics, Harvard University
    • Harvard University

  • Andrew Y Joe

    • Physics, Harvard University
    • Harvard University

  • Daniel A Rhodes

    • Columbia University
    • Physics, Columbia University
    • National High Magnetic Field Laboratory, Tallahassee, FL-32310, USA.
    • Columbia Nano Initiative, Columbia University
    • Department of Mechanical Engineering, Columbia University, New York, NY 10027 USA
    • Mechanical Engineering, Columbia University
    • Columbia Univ

  • Bumho Kim

    • Department of Mechanical Engineering, Columbia University
    • Mechanical Engineering, Columbia University

  • James Hone

    • Columbia University
    • Mechanics, Columbia University
    • Department of Mechanical Engineering, Columbia University in the City of New York
    • Department of Mechanical Engineering, Columbia University
    • Department of Mechanical Engineering, Columbia University, New York, NY 10027 USA
    • Mechanical Engineering, Columbia University

  • Philip Kim

    • Harvard University
    • Department of Physics, Harvard University & School of Engineering and Applied Sciences, Harvard University
    • Department of Physics, Harvard University, Cambridge, MA 02138, USA.
    • Physics, Harvard University
    • Physics and Applied Physics, Harvard University
    • Physics department, Harvard University