Local Temperature Redistribution and Structural Transition During Joule-Heating-Driven Conductance Switching in VO2
Suhas Kumar, Matthew D. Pickett, John Paul Strachan, Gary Gibson,, Yoshio Nishi, and R. Stanley Williams
TL;DR
This study investigates how Joule heating causes conductance switching in VO2, revealing abrupt local temperature redistribution and a simultaneous structural phase transition through combined experimental and simulation approaches.
Contribution
It provides new insights into the local temperature dynamics and structural changes during conductance switching in VO2 using multiple in-situ techniques.
Findings
Abrupt local temperature redistribution occurs during switching
Conductance switching coincides with a structural phase transition
Multiple in-situ techniques confirm the temperature and structural changes
Abstract
Joule-heating induced conductance-switching is studied in VO2, a Mott insulator. Complementary in-situ techniques including optical characterization, blackbody microscopy, scanning transmission x-ray microscopy (STXM) and numerical simulations are used. Abrupt redistribution in local temperature is shown to occur upon conductance-switching along with a structural phase transition, at the same current.
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