Dynamics of voltage-driven oscillating insulator-metal transitions

Recent experiments demonstrated emerging alternating insulator and metal phases in Mott insulators actuated by a direct bias voltage, leading to oscillating voltage outputs with characteristic frequencies. Here, we develop a physics-based nonequilibrium model to describe the dynamics of oscillating insulator-metal phase transitions and experimentally validate it using a VO2 device as a prototype. The oscillation frequency is shown to scale monotonically with the bias voltage and series resistance and terminate abruptly at lower and upper device-dependent limits, which are dictated by the nonequilibrium carrier dynamics. We derive an approximate analytical expression for the dependence of the frequency on the device operating parameters, which yields a fundamental limit to the frequency and may be utilized to provide guidance to potential applications of insulator-metal transition materials as building blocks of brain-inspired non-von Neumann computers.

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Work Title Dynamics of voltage-driven oscillating insulator-metal transitions
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Open Access
Creators
  1. Yin Shi
  2. Amy E. Duwel
  3. Dennis M. Callahan
  4. Yifei Sun
  5. F. Anika Hong
  6. Hari Padmanabhan
  7. Venkatraman Gopalan
  8. Roman Engel-Herbert
  9. Shriram Ramanathan
  10. Long-Qing Chen
License In Copyright (Rights Reserved)
Work Type Article
Publisher
  1. Physical Review B
Publication Date 2021
Publisher Identifier (DOI)
  1. https://doi.org/10.1103/PhysRevB.104.064308
Deposited August 10, 2022

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Version 1
published

  • Created
  • Updated
  • Added Creator Sandra Elder
  • Added Dynamics of voltage-driven oscillating insulator-metal transitions.pdf
  • Updated License Show Changes
    License
    • https://rightsstatements.org/page/InC/1.0/
  • Published
  • Updated Publisher, Publisher Identifier (DOI), Publication Date Show Changes
    Publisher
    • Physical Review B
    Publisher Identifier (DOI)
    • https://doi.org/10.1103/PhysRevB.104.064308
    Publication Date
    • 2021-08-19
    • 2021
  • Deleted Creator Sandra Elder
  • Added Creator Yin Shi
  • Added Creator Amy E. Duwel
  • Added Creator Dennis M. Callahan
  • Added Creator Yifei Sun
  • Added Creator F. Anika Hong
  • Added Creator Hari Padmanabhan
  • Added Creator Venkatraman Gopalan
  • Added Creator Roman Engel-Herbert
  • Added Creator Shriram Ramanathan
  • Added Creator Long-Qing Chen
  • Updated