[1P01-52] Poster Presentation

[1P31] Self-sustained electrical oscillations of VO₂-based planar devices and their coupled oscillation phenomena

*Junpei Kidokoro¹, Kunio Okimura¹, Lamisa Hoque¹, Suruz Md Mian², Toshihiro Nakanishi³ (1. Graduate School of Engineering, Tokai University, 2. Faculty of Science and Technology, Seikei University, 3. Department of Electronic Science and Engineering, Kyoto University)

Vanadium dioxide (VO₂) shows a sharp insulator-metal transition (IMT) with resistance change over 4 orders at around 68°C concomitant with a structural phase transition (SPT). The VO₂ film also shows rapid decrease in resistance with current jump when certain voltage is applied between facing electrodes on the film. This current jump possesses a negative resistance region, resulting in the phenomenon of self-sustained oscillation. Self-sustained oscillation is expected to be applied to neuromorphic devices. Further, it is known that parallel connection of self-sustained oscillators realizes coupled oscillation, in which their phases are automatically synchronized . The coupled oscillations are expected to be applied to various issues in mathematical engineering field, such as graph coloring problem. In this study, the coupled oscillation was successfully demonstrated in a planar device with two self-oscillation circuits.