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We demonstrate a non-volatile field-effect transistor (NVFET) with a 3-nm amorphous HfO 2  dielectric that can simulate the synaptic functions under the difference and repetition of gate voltage ( V  G ) pulses. Under 100 ns write/erase (W/E) pulse, a memory window greater than 0.56 V and cycling endurance above 10 6  are obtained. The storied information as short-term plasticity (STP) in the device has a spiking post-synaptic drain current ( I  D ) that is a response to the  V  G  input pulse and spontaneous decay of  I  D . A refractory period after the stimuli is observed, during which the  I  D  hardly varies with the  V  G  well-emulating the bio-synapse behavior. Short-term memory to long-term memory transition, paired-pulse facilitation, and post-tetanic potentiation are realized by adjusting the  V  G  pulse waveform and number. The experimental results indicate that the amorphous HfO 2  NVFET is a potential candidate for artificial bio-synapse applications.

Synaptic Behaviors in Ferroelectric-Like Field-Effect Transistors with Ultrathin Amorphous HfO2 Film