Electrical Switching in Mott Material 1D Nanowires: Joule Heating vs. Electric Field

ORAL

Abstract

We show unambiguous evidence for thermal and non-thermal mechanisms behind the insulator-to-metal transition in current-driven Mott materials. Distinguishing between these two mechanisms has proven difficult due to inhomogeneity of the current distribution in the device. By reducing the dimensionality of the devices to a one dimensional nanowire, inhomogeneity is avoided, thus allowing the two different mechanisms to be identified. The differences between the switching mechanisms in two prototypical Mott materials, VO2 and V2O3, are discussed. Our results have direct implications for applications in neuromorphic technologies.

*We acknowledge support from the Vannevar Bush Faculty Fellowship program sponsored by the Basic Research Office of the Assistant Secretary of Defense for Research and Engineering and funded by the Office of Naval Research through grant N00014-15-1-2848.

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Presenters

  • Yoav Kalcheim

    • University of California San Diego
    • Department of Physics and Center for Advanced Nanoscience, University of California - San Diego
    • University of California, San Diego
    • Department of Physics and Center for Advanced Nanoscience, University of California San Diego
    • Department of Physics, University of California San Diego

Authors

  • Yoav Kalcheim

    • University of California San Diego
    • Department of Physics and Center for Advanced Nanoscience, University of California - San Diego
    • University of California, San Diego
    • Department of Physics and Center for Advanced Nanoscience, University of California San Diego
    • Department of Physics, University of California San Diego

  • Javier del Valle

    • Department of Physics and Center for Advanced Nanoscience, University of California - San Diego
    • Department of Physics and Center for Advanced Nanoscience, University of California San Diego
    • Department of Physics, University of California San Diego

  • Min-Han Lee

    • Department of Physics and Center for Advanced Nanoscience, University of California San Diego

  • Pavel Salev

    • Royal Holloway, University of London
    • University of California, San Diego
    • Department of Physics and Center for Advanced Nanoscience, University of California San Diego
    • Department of Physics, University of California San Diego

  • Ivan Schuller

    • Physics, University of California, San Diego
    • University of California San Diego
    • Department of Physics and Center for Advanced Nanoscience, University of California - San Diego
    • Physics, UC San Diego
    • University of California, San Diego
    • Physics and Astronomy, University of California San Diego
    • Department of Physics and Center for Advanced Nanoscience, University of California San Diego
    • Department of Physics and Center for Advanced Nanoscience, University of California, San Diego
    • Department of Physics, University of California San Diego