Multifunctional Nanoionic Devices Enabling Simultaneous Heterosynaptic Plasticity and Efficient In‐Memory Boolean Logic

The development of smart, scalable, and power efficient computers relies on innovative technologies that can distribute memory alongside processing, such as emerging neuromorphic computing and in‐memory logic technologies. Here, a type of vertical 3‐terminal oxide based nanoionic device capable of implementing heterosynaptic plasticity and nonvolatile Boolean logic simultaneously is demonstrated. The heterosynaptic plasticity endows the devices with facilely tunable synaptic kinetics via tailoring modulatory signals, which is shown to be crucial for achieving optimized learning scheme, therefore offering promising building blocks for neuromorphic computing. Furthermore, it is demonstrated that these heterosynaptic devices can simultaneously be utilized to implement nonvolatile Boolean logic with improved efficiency compared with existing approaches, therefore implying in‐memory computing potentialities. The heterosynaptic devices with such multifunctionality thus hold great potential for next‐generation non‐von Neumann computing applications.