Fig. 5From: Atomic Layer Deposited Hf0.5Zr0.5O2-based Flexible Memristor with Short/Long-Term Synaptic Plasticitya Typical PPF behavior induced by a pair of pre-synaptic spikes (2 V, 10 ms). b The PPD phenomenon of the artificial flexible synapse under inhibited spikes (− 1 .5V, 10 ms)Back to article page