Tuesday, July 16, 2013

1307.3774 (You Zhou et al.)

Voltage-triggered Ultra-fast Metal-insulator Transition in Vanadium
Dioxide Switches

You Zhou, Xiaonan Chen, Changhyun Ko, Zheng Yang, Chandra Mouli, Shriram Ramanathan
Electrically driven metal-insulator transition 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 (MIM) structures and reproducible high-speed switching measurements in these two-terminal devices. We have observed a clear correlation between electrically-driven ON/OFF current ratio and thermally-induced resistance change during metal-insulator transition. It is also found that sharp metal-insulator transition could be triggered by 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.
View original: http://arxiv.org/abs/1307.3774

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