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• W3204246553 abstract "Abstract Synaptic elements based on memory devices play an important role in boosting neuromorphic system performance. Here, we show two types of fab-friendly HfO 2 material-based resistive memories categorized by configuration and an operating principle for a suitable analog synaptic device aimed at inference and training of neural networks. Since the inference task is mainly related to the number of states from a recognition accuracy perspective, we first demonstrate multilevel cell (MLC) properties of compact two-terminal resistive random-access memory (RRAM). The resistance state can be finely subdivided into an MLC by precisely controlling the evolution of conductive filament constructed by the local movement of oxygen vacancies. Specifically, we investigate how the thickness of the HfO 2 -switching layer is related to an MLC, which is understood by performing physics-based modeling in MATLAB from a microscopic view. Meanwhile, synaptic devices driven by an interfacial switching mechanism instead of local filamentary dynamics are preferred for training accelerated neuromorphic systems, where the analogous transition of each state ensures high accuracy. Thus, we introduce three-terminal electrochemical random-access memory that facilitates mobile ions across the entire HfO 2 switching area uniformly, resulting in highly controllable and gradually tuned current proportional to the amount of migrated ions." @default.
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• W3204246553 date "2021-10-20" @default.
• W3204246553 modified "2023-10-16" @default.
• W3204246553 title "Two- and three-terminal HfO₂-based multilevel resistive memories for neuromorphic analog synaptic elements" @default.
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• W3204246553 doi "https://doi.org/10.1088/2634-4386/ac29ca" @default.
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