Development of nanoswitches based on photoexcited ionics phenomena

我们已经开发了基于纳米尺度上金属离子传导的阻变器件。有人发现，使用氧化物薄膜的器件的开关机制包括由非均匀成核形成的金属丝及其溶解由于热化学反应辅助焦耳加热。开关行为的温度变化可以用经典成核理论来解释，这一事实证明了所提出的操作模型的有效性。利用聚合物电解质膜中的金属离子的传导实现了类似的开关装置。此外，由于光照射的开关现象也观察到使用硫系玻璃膜的设备。

We have developed resistive switching devices based on conduction of metal ions on a nanometer scale. It was found that the switching mechanism of devices using oxide thin films consists of the formation of a metal filament by inhomogeneous nucleation and its dissolution due to a thermochemical reaction assisted by Joule heating. The validity of the proposed operation model was demonstrated by the fact that the temperature variation of switching behavior can be explained in terms of classical nucleation theory. Similar switching devices were achieved using conduction of metal ions in polymer electrolyte films. Moreover, switching phenomena due to light irradiation were also observed for a device using chalcogenide glass films.