Electric Field-Induced Metal-to-Insulator Phase Transition in Few-Layered MoSe<sub>2</sub>

ORAL

Abstract

The Metal-Insulator phase transition (MIT) is one of the most interesting phenomena to study particularly in two-dimensional transition-metal dichalcogendes (TMDCs). A few recent studies1,2 have indicated a possible MIT on MoS2 and ReS2, but the nature of the MIT is still enigmatic due to the interplay between charge carriers and disorder in 2D systems. We will present a potential MIT in few-layered MoSe2 FETs based on four-terminal conductivity measurements. Conductivities measured in multiple samples strongly demonstrate the insulating-to-metallic-like phase transition when the charge carrier density increased above a critical threshold. The nature of the phase transition will be discussed with an existing theoretical model.
1B. H. Moon et al, Nat Commun. 2018; 9: 2052. 2N. R. Pradhan et al, Nano Lett. 2015, 15, 12, 8377

*This work was performed, in part, at the Center for Nanoscale Materials, a U.S. Department of Energy Office of Science User Facility, and supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357. This work is also supported by NSF-DMR #1826886 and # 1900692. A portion of this work was performed at the NHMFL, which is supported by the NSF Cooperative Agreement No. DMR-1644779 and the State of Florida

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Presenters

  • Nihar Pradhan

    • Jackson State University
    • Department of Chemistry, Physics and Atmospheric Science, Jackson State University, Jackson, MS-39217, USA

Authors

  • Nihar Pradhan

    • Jackson State University
    • Department of Chemistry, Physics and Atmospheric Science, Jackson State University, Jackson, MS-39217, USA

  • Carlos Garcia

    • Florida State University, Tallahassee, FL 32310, USA, National High Magnetic Field Lab

  • Bhaswar Chakrabarti

    • Center for Nanoscale Materials,9700 S-Cass Avenue, Lemont, IL-60439, USA, Argonne National Lab

  • Jawnaye Nash

    • Department of Chemistry, Physics and Atmospheric Science, Jackson State University, Jackson, MS-39217, USA

  • Christina S Miller

    • Center for Nanoscale Materials,9700 S-Cass Avenue, Lemont, IL-60439, USA, Argonne National Lab

  • Dharmaraj Raghavan

    • Howard University
    • 6525 College Street, NW, Department of Chemistry, Washington DC 20059, Howard University

  • Alamgir Karim

    • Department of Chemical & Biomolecular Engineering, S333 Engineering Bldg 1, 4726 Calhoun Rd, Houston, TX 77204, University of Houston

  • Liliana Stan

    • Center for Nanoscale Materials,9700 S-Cass Avenue, Lemont, IL-60439, USA, Argonne National Lab

  • Ralu Divan

    • Center for Nanoscale Materials, Argonne
    • Argonne National Laboratory
    • Center for Nanoscale Materials,9700 S-Cass Avenue, Lemont, IL-60439, USA, Argonne National Lab

  • Daniel Rosenmann

    • Center for Nanoscale Materials,9700 S-Cass Avenue, Lemont, IL-60439, USA, Argonne National Lab

  • Anirudha Sumant

    • Center for Nanoscale Materials,9700 S-Cass Avenue, Lemont, IL-60439, USA, Argonne National Lab

  • Stephen A McGill

    • National High Magnetic Field Laboratory
    • NHMFL, Florida
    • Natl High Magnetic Field Lab
    • National High Magnetic Field Laboratory, Tallahassee, Florida 32310, USA
    • Physics, Florida State University
    • Florida State University, Tallahassee, FL 32310, USA, National High Magnetic Field Lab