Enhancement of Thermal Conductivity Across the Metal-Insulator Transition in Vanadium Dioxide

ORAL

Abstract

The metal-to-insulator transition (MIT) in vanadium dioxide (VO2) is investigated by electrical and thermal transport measurements. We report an order-of-magnitude enhancement of thermal conductivity across the MIT region in the VO2 single crystal. Magnetic field dependent measurements reveal that the thermal conductivity peak doesn't show an obvious dependence on the magnetic field, which indicates that the enhancement of thermal conductivity could come from neutral heat carriers such as phonons. Our experiment explores a potential direction for achieving thermal management in phase-change materials.

*This work is mainly supported by the Office of Naval Research through the Young Investigator Prize under Award No. N00014-15-1-2382 (thermal transport and electrical transport measurements). The sample growth in UTK is supported by NSF-DMR-1350002 (sample growth). The measurement instrument benefit from the National Science Foundation Major Research Instrumentation award under No. DMR-1428226 (supports the purchase of the PPMS). Q.H. thanks for the support from the Go students program of ORNL.

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Presenters

  • Lu Chen

    • Physics, University of Michigan
    • Department of Physics, University of Michigan
    • University of Michigan

Authors

  • Lu Chen

    • Physics, University of Michigan
    • Department of Physics, University of Michigan
    • University of Michigan

  • Ziji Xiang

    • Physics, University of Michigan
    • Department of Physics, University of Michigan
    • University of Michigan

  • Colin Tinsman

    • Physics, University of Michigan
    • Department of Physics, University of Michigan
    • University of Michigan

  • Tomoya Asaba

    • Physics, University of Michigan
    • MPA-CMMS, Los Alamos National Laboratory
    • Department of Physics, University of Michigan
    • University of Michigan
    • Los Alamos National Laboratory

  • Qing Huang

    • Department of Physics and Astronomy, University of Tennessee
    • Department of Physics and Astronomy, The University of Tennessee, Knoxville
    • Department of Physics and Astronomy, University of Tennessee, Knoxville

  • Haidong Zhou

    • University of Tennessee
    • Department of Physics and Astronomy, University of Tennessee
    • University of Tennessee, Knoxville
    • Physics, University of Tennessee, Knoxville, TN, United States
    • Physics, University of Tennessee
    • Department of Physics and Astronomy, The University of Tennessee, Knoxville
    • Department of Physics and Astronomy, University of Tennessee, Knoxville
    • Department of Physics, University of Tennessee

  • Lu Li

    • University of Michigan
    • Physics, University of Michigan
    • Department of Physics, University of Michigan