Voltage-Triggered Ultrafast Phase Transition in Vanadium Dioxide Switches

By You Zhou, Xiaonan Chen, C. Ko, Zheng Yang, C. Mouli, Shriram Ramanathan. IEEE Electron Device Letters, 2013

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Electrically driven metal-insulator transition (MIT) in vanadium dioxide (VO2) is of interest in emerging memory devices, neural computation, and high-speed electronics. We report on the fabrication of out-of-plane VO2 metal-insulator-metal structures and reproducible high-speed switching measurements in these two-terminal devices. We have observed a clear correlation between the electrically driven on/off current ratio and the thermally induced resistance change during MIT. It is also found that sharp MIT could be triggered by the external voltage pulses within 2 ns at room temperature and the achieved on/ off ratio is greater than two orders of magnitude with good endurance.

Subfields: Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering, Polymers and Plastics

View Paper: https://www.semanticscholar.org/paper/55855b1ba093d3d57e103bc1b4f7a9c6c65061fe