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- W2912238404 abstract "Abstract We demonstrate inherent biorealistic synaptic plasticity functions in the Pt/n-ZnO/SiO 2– x /Pt heterostructures, where the n-ZnO semiconductor is geometrically cone-shaped in the size of a few nanometers. The synaptic functions were achieved within a two-terminal, electroforming-free, and low-power rectifying diode-like resistive switching device. The important rate-dependent synaptic functions, such as the nonlinear transient conduction behavior, short- and long-term plasticity, paired-pulse facilitation, spike-rate-dependent plasticity and sliding threshold effect, were investigated in a single device. These characteristics closely mimic the memory and learning functions of those in biosynapses, where frequency-dependent identical spiking operations are mostly taking place, and we emulate these characteristics in the “Learning-Forgetting-Relearning” synaptic behavior. The switching dynamics in the cone-shaped n-ZnO semiconductor are correlated with the transport mechanism along the grain boundaries of the charged ion species, namely, oxygen vacancies and charged oxygen. The diffusion and generation/recombination of these defects have specific time scales of self-decay by virtue of the asymmetric profile of the n-ZnO cone defects. Finally, the essential biorealistic synaptic plasticity functions were discovered for the perspectives of dynamic/adaptive electronic synapse implementations in hardware-based neuromorphic computing." @default.
- W2912238404 created "2019-02-21" @default.
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- W2912238404 date "2019-01-23" @default.
- W2912238404 modified "2023-10-17" @default.
- W2912238404 title "Bio-realistic synaptic characteristics in the cone-shaped ZnO memristive device" @default.
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- W2912238404 doi "https://doi.org/10.1038/s41427-018-0105-7" @default.
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