Formation and dissolution of conductive channels in an Ag 2 S-islands network
Keita Ojima, Tsuyoshi Hasegawa, Yasuhisa Naitoh, Hisashi Shima, Hiroyuki Akinaga · Japanese Journal of Applied Physics · 2020
Abstract A network that shows dynamical change in response to each input pattern works as a reservoir. In this study, we propose to use a network of Ag 2 S islands for reservoir computing. Input of a small number of electrons to an Ag 2 S island from a neighbored island causes Ag nanowire growth, which eventually connects the two islands. Shrinkage of an Ag nanowire also occurs depending on the distribution of a local electric potential. Thus, growth and shrinkage of Ag nanowires among Ag 2 S islands shows dynamical change in conductive channels responding to input bias, which is demonstrated by an Ag 2 S-island network surrounded by input/output electrodes. The Ag 2 S islands that are electrically connected to a surrounding electrode are identified using a conductive-atomic force microscope, confirming the operating mechanism.