Avalanche breakdown and self-stabilization effects in electrically driven transition of carbon nanotube covered VO2 film

作者：Chen, Yuliang; Chen, Shi; Liu, Qianghu; Ren, Hui; Zheng, Xusheng; Wang, Liangxin; Lu, Yuan; Song, Li; Zhang, Guobin; Zou, Chongwen^*

来源：Journal of Physics D: Applied Physics , 2017, 50(25): 255101.

DOI：10.1088/1361-6463/aa7161

• vanadium dioxide
• two-terminal device
• electrically driven transition
• avalanche breakdown

Electrical-driven metal-insulator transition (MIT) is quite vital and widespread for both applications and MIT mechanism of VO2. In this report, we discussed the avalanche breakdown and self-stabilization effects behind the electrically driven phase transition in macro-scale carbon nanotube covered VO2 film to further understand the phase transition behaviors as well as explore promising electrical-driven VO2 devices. It was found that the Joule heat was the main source to trigger the phase transition of VO2 film. However, the time-dependent triggering routes were quite different, since the avalanche behavior was observed under the voltage-driven mode, while the gradual self-stabilization existed in the current-driven mode. The simulation results based on the proposed thermodynamics models were in good agreement with the experimental phenomena, which were basically originated from the intrinsic first-order phase transition properties of VO2 film.

• 出版日期2017-6-28
• 单位中国科学技术大学