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

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APS March Meeting 2020

Volume 65, Number 1

Monday–Friday, March 2–6, 2020; Denver, Colorado

Session A27: Atomic Structure, Lattice Properties, and Phase Transitions

8:00 AM–10:48 AM, Monday, March 2, 2020
Room: 404

Sponsoring Unit: FIAP
Chair: Nihar Pradhan

Abstract: A27.00001 : Electric Field-Induced Metal-to-Insulator Phase Transition in Few-Layered MoSe₂*

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Presenter:

Nihar Pradhan
(Department of Chemistry, Physics and Atmospheric Science, Jackson State University, Jackson, MS-39217, USA)

Authors:

Nihar Pradhan
(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
(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,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
(Florida State University, Tallahassee, FL 32310, USA, National High Magnetic Field Lab)

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 studies^1,2 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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Bulletin of the American Physical Society

APS March Meeting 2020

Volume 65, Number 1

Monday–Friday, March 2–6, 2020; Denver, Colorado

Session A27: Atomic Structure, Lattice Properties, and Phase Transitions

Abstract: A27.00001 : Electric Field-Induced Metal-to-Insulator Phase Transition in Few-Layered MoSe2*

Presenter:

Authors:

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Abstract: A27.00001 : Electric Field-Induced Metal-to-Insulator Phase Transition in Few-Layered MoSe₂*