Fig. 16

a Typical logarithmic scale depiction of I–V sweeping graph of Pt/In-doped TiO₂/Au memristor. b Device is set off, the metallic cations are distributed in top layer of In-doped TiO₂ film. c The formation of filamentary conductive channels, the device is set On (Set, stage 1). d The depletion of metallic cations adjacent to the bottom electrode. The device is set off again (Reset, stage 2). e By imposing the reverse gate voltage, the metallic cations again move toward the cathode electrode (top Pt electrode) and again form a metallic cation bridge and the device is set On (Set-stage 3). f By depletion of metallic cations, at Pt electrode the device is set off again (Reset, stage 4). Reprinted with permission form [174]