A resistance switching device exhibiting potentiation and depression under the same voltage polarity

In this study we present a resistance switching device that exhibits analogue potentiation and depression of conductance in the same polarity. This is in contrast to devices studied previously which exhibit potentiation and depression in opposite polarities. This has the potential to reduce complexity of the surrounding circuitry in neuromorphic computing by only requiring voltage pulses of a single polarity. In this paper, we detail how to induce this unique behaviour in devices as well as how to tune its properties to a desired response.