A neural network circuit using persistent interfacial conducting heterostructures

The FeFET, based on epitaxial perovskite heterostructures, is termed an OxiM. It showed persistent interfacial conduction even when the ferroelectric polarization curve was swinging on a minor loop and also showed good controllability of drain current using pulse voltages. A neuron circuit composed of OxiMs and an op-amp adder circuit showed that the gain of the neuron circuit could also be modulated smoothly by means of pulse voltages. Using a numerical model of the neuron circuit, we simulated the learning process for “exclusive OR” and achieved a good convergence characteristic.