Electric Field-Induced Metal-to-Insulator Phase Transition in Few-Layered MoSe2

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

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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