Compact Model for Describing the Plasticity of Memristors Based on Nanolayers of LiNbO3 and (Co–Fe–B)х(LiNbO3)100–х Composite According to the Biosimilar STDP Rule

А compact phenomenological model is proposed to describe the plasticity of memristive structures based on nanolayers of LiNbO3 and (Co–Fe–B)x(LiNbO3)100–x composite, taking into account the features of resistive switching of the structures and hopping electron transport in amorphous LiNbO3. The model well describes the current–voltage characteristics of memristors in a crossbar array, and the effective microscopic parameters found in the fitting of the current—voltage characteristics make it possible to predict the result of changes in the conductivity according to spike-timing-dependent plasticity (STDP), and in addition, the dependence of the STDP window on the initial conductivity of the memristor. The results obtained can be used in the development of algorithms for training spiking neuromorphic computing systems and identifying memristive STDP, which is effective for their implementation.