Fig. 3
The property of gradual current change in the context of pulse cycling of Pt/HfOx/ZnOx/TiN. a Current evolution of the device for the first 200 pulse numbers. b Endurance test up to 3 × 103 cycles. Pulse of ±2 V with 100-ms width was applied to switch the device between the LRS and the HRS, and the resistances were read out at 0.1 V at room temperature. c Current evolution of the same device after the 3 × 103 cycle endurance test in b