Electronic and Thermal Effects in the Insulator-Metal Phase Transition in VO2 Nano-Gap Junctions

Abstract

By controlling the thermal transport of VO2 nano-gap junctions using device geometry, contact material, and applied voltage waveforms, the electronically induced insulator-metal phase transition is investigated in the adiabatic heating and transient carrier injection regimes. With a gradual ramping of an applied voltage on a microsecond time scale, the transition electric field threshold can be directly reduced by the Joule heating. With an abrupt applied voltage, the transition threshold is initiated by carriers injected within the first tens of nanoseconds, but the complete insulator-metal phase transition is limited by thermal redistribution times to hundreds of nanoseconds.

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Document Details

Document Type
Technical Report
Publication Date
Nov 27, 2014
Accession Number
AD1003615

Entities

People

  • Arash Joushaghani
  • David Alain
  • J. S. Aitchison
  • Joyce K. Poon
  • Junho Jeong
  • Suzanne Paradis

Organizations

  • Defence Research and Development Canada

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Advanced Materials
  • Electric Fields
  • Electron Beam Lithography
  • Heat Energy
  • Heat Transfer
  • Intercellular Junctions
  • Materials
  • Metal Contacts
  • Microsecond Time
  • Phase Transformations
  • Physics
  • Specific Heat
  • Subatomic Particles
  • Thermal Conductivity
  • Transition Temperature
  • Transitions
  • Work Functions

Fields of Study

  • Physics

Readers

  • Electrical Engineering
  • Fluid Mechanics and Fluid Dynamics.
  • Radar Systems Engineering.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene