Research Article
Forming-Free Pt/Ti/AlOx/CeOx/Pt Multilayer Memristors with Multistate and Synaptic Characteristics
Figure 6
(a) STDP realization schemes by pulse amplitude modulation. The pulse amplitudes for the prespike are −0.5, 0.45, 0.43, 0.41, 0.39, 0.37, 0.35, 0.33, 0.31, and 0.29 V, consecutively, and for the postspike, they are −0.25, 0.45, 0.4, 0.35, 0.3, 0.25, 0.2, 0.15, 0.1, and 0.05 V, consecutively. The width of each pulse is 50 ms. The interval between two pulses is 150 ms. (b) Implementation of STDP learning by the Pt/Ti/AlOx/CeOx/Pt memristor.
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