In-materio reservoir working at low frequencies in a AgS-island network

• Published in: Nanoscale Vol. 14; no. 2; pp. 7634 - 764
• Main Authors: Nakajima, Motoharu, Minegishi, Kazuki, Shimizu, Yosuke, Usami, Yuki, Tanaka, Hirofumi, Hasegawa, Tsuyoshi
• Format: Journal Article
• Published: 26.05.2022
• ISSN: 2040-3364; 2040-3372
• DOI: 10.1039/d2nr01439d

A Ag 2 S-island network is fabricated with surrounding electrodes to enable it to be used as a reservoir for unconventional computing. Local conductance change occurs due to the growth/shrinkage of Ag filaments from/into each Ag 2 S island in the reservoir. The growth/shrinkage of Ag filaments is caused by the drift of Ag + cations in each Ag 2 S island, which results in a unique non-linear response as a reservoir, especially at lower frequencies. The response of the reservoir is shown to depend on the frequency and amplitude of the input signals. So as to evaluate its capability as a reservoir, logical operations were performed using the subject Ag 2 S-island network, with the results showing an accuracy of greater than 99%. A reservoir that is more sensitive to lower frequencies is developed by a Ag 2 S-island network, where Ag filament growth/shrinkage achieves non-linear transformation of input signals. Six logic operations are achieved with accuracy higher than 99%.