Ultralow Energy Consumption and Fast Neuromorphic Computing Based on La_0.1Bi_0.9FeO₃ Ferroelectric Tunnel Junctions

Abstract

Low-power and fast artificial neural network devices represent the direction in developing analogue neural networks.Here, an ultralow power consumption (0.8 fJ) and rapid (100 ns) La 0.1 Bi 0.9 FeO 3 /La 0.7 Sr 0.3 MnO 3 ferroelectric tunnel junction artificial synapse has been developed to emulate the biological neural networks. The visual memory and forgetting functionalities have been emulated based on long-term potentiation and depression with good linearity. Moreover, with a single device, logical operations of "AND" and "OR" are implemented, and an artificial neural network was constructed with a recognition accuracy of 96%. Especially for noisy data sets, the recognition speed is faster after preprocessing by the device in the present work. This sets the stage for highly reliable and repeatable unsupervised learning.