Tunneling spectroscopy of VOPc encapsulated in Van der Waals heterostructures

ORAL

Abstract

Small molecules have gained recent interest as qubit candidates due to their tunability via chemical modification. Molecular qubits have been studied extensively optically but electrical studies are hampered by the lack of a robust mechanism for integration into a solid-state architecture. In this work, we present a method for encapsulating small molecules, vanadyl phthalocyanine (VOPc), into a mechanically exfoliated heterostructure to generate a graphite/hBN /VOPc/hBN/graphite tunnel junction and probe the electronic states of the molecule via tunneling spectroscopy. We observe resonances in the tunneling spectra of these devices that quantitatively agree with spectra obtained via scanning tunneling microscopy (STM) of graphite/hBN/VOPc half-stacks. This result paves the way for further studies of the electrical and spin properties of many a wide variety of molecules, adatoms, and point defects encapsulated in 2D tunnel junctions.

*This work supported by NSF award OMA-1936219.

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Presenters

  • Zoe Phillips

    • Ohio State University

Authors

  • Zoe Phillips

    • Ohio State University

  • Marzieh Kavand

    • The Ohio State University
    • Ohio State University

  • William H Koll

    • The Ohio State University

  • Morgan J Hamilton

    • The Ohio State University

  • Ethel Perez-Hoyos

    • Ohio State Univ - Columbus

  • Rianna Greer

    • Massachusetts Institute of Technology

  • Mehdi Maleki Sanukesh

    • University of Iowa
    • The University of Iowa

  • Yuxin Zhang

    • The Ohio State University

  • Chun Ning Lau

    • Ohio State University
    • Ohio State Univ - Columbus

  • Takashi Taniguchi

    • Kyoto Univ
    • National Institute for Materials Science
    • Research Center for Materials Nanoarchitectonics
    • Research Center for Materials Nanoarchitectonics, National Institute for Materials Science
    • National Institute for Materials Sciences
    • NIMS
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan
    • National Institute for Material Science
    • International Center for Materials Nanoarchitectonics, NIMS, Japan
    • International Center for Materials Nanoarchitectonics, Tsukuba
    • National Institue for Materials Science
    • Kyoto University
    • National Institute of Materials Science
    • International Center for Materials Nanoarchitectonics and National Institute for Materials Science

  • Michael E Flatté

    • University of Iowa
    • Department of Physics and Astronomy, University of Iowa

  • Danna Freedman

    • MIT

  • Jay Gupta

    • Ohio State University

  • Ezekiel W Johnston-Halperin

    • Ohio state University