Low-Voltage Resistive Switching and Synaptic Plasticity in Cs ₂ AgBiBr ₆ Memristors

ions injected from the electrode. A detailed conduction model is proposed based on space charge-limited conduction and ion-induced electric field screening. Furthermore, the volatile RS characteristics enable biologically inspired synaptic functions, including spike amplitude-dependent plasticity (SADP), spike number-dependent plasticity (SNDP), and paired-pulse facilitation (PPF) with a maximum facilitation index of 169%, benchmarking competitively among perovskite memristive synapses. Based on experimentally extracted synaptic weight-update rules, an artificial neural network simulation achieved a peak recognition accuracy of 98%.