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.



Work Title Dynamics of voltage-driven oscillating insulator-metal transitions
Open Access
  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
  1. Physical Review B
Publication Date 2021
Publisher Identifier (DOI)
  1. https://doi.org/10.1103/PhysRevB.104.064308
Deposited August 10, 2022




This resource is currently not in any collection.

Work History

Version 1

  • Created
  • Updated
  • Added Creator Sandra Elder
  • Added Dynamics of voltage-driven oscillating insulator-metal transitions.pdf
  • Updated License Show Changes
    • https://rightsstatements.org/page/InC/1.0/
  • Published
  • Updated Publisher, Publisher Identifier (DOI), Publication Date Show Changes
    • 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