Author:
Taniguchi Mitsuki,Takada Tomoasa,Tomiyoshi Kisara,Wada Tomoki,Nishioka Daiki,Higuchi Tohru
Abstract
Abstract
We have studied the neuromorphic learning and forgetting functions of Pt/Ti0.99Sc0.01O2–δ
/Pt multilayer films with a cross-point array prepared by RF magnetron sputtering and probed their mechanism. The Ti0.99Sc0.01O2–δ
layer with an oxygen vacancy ratio of ∼2.5% exhibited high electron–proton mixed conduction. The multilayer draws a nonlinearity current–voltage curve owing to the Schottky barrier between the upper or lower Pt and Ti0.99Sc0.01O2–δ
layers. Two singular current modulations corresponding to the learning long-term memory (LTM) and the short-term memory (STM) functions were observed by applying positive voltage pulses of 0.8 V with interval times of 14 s and 80 s, respectively. Furthermore, the forgetting LTM function of the human brain is also exhibited by applying negative voltage pulses of 1.0 V with an interval time of 14 s. These neuromorphic current responses are considered to be attributed to the collaborative behaviors of electron, proton, and oxygen vacancy at the Schottky barrier.
Subject
General Physics and Astronomy,General Engineering
Cited by
1 articles.
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