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March 12, 2026Applied Physics Letters2 citations

Dual-function Sb2S3/HfO2 memristor for reservoir computing and neural network learning via decoupled short- and long-term memory

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MSMengru SongLLLele LiHGHan Gu

Key Points

  • The study aims to develop a dual-function memristor that integrates short-term and long-term memory functionalities.
  • Proposed a memristor based on an Sb2S3/HfO2 heterostructure.
  • Emulated biological synaptic behaviors like paired-pulse facilitation and linear long-term potentiation.
  • Constructed a nonvolatile synaptic array for a fully connected neural network.
  • Built a physical reservoir computing system using short-term memory dynamics.
  • Achieved 94.5% accuracy in neural network tests.
  • Obtained 98% accuracy in spatiotemporal feature recognition of iris image sequences.

Abstract

Conventional computing architectures typically rely on separate devices to achieve dynamic sensing and long-term storage, leading to low integration density, high energy consumption, and significant data movement bottlenecks. Here, a biomimetic dual-function memristor based on an Sb2S3/HfO2 heterostructure is proposed, in which synergistic regulation of ion migration and electronic transport enables the materials-assisted decoupling and coordinated integration of short-term memory (STM) and long-term memory (LTM) functions within a single device. The device successfully emulates various biological synaptic behaviors, including paired-pulse facilitation/depression, tunable excitatory postsynaptic currents (EPSCs), and highly linear long-term potentiation/depression. Subsequently, utilizing the LTM characteristics of the device, a nonvolatile synaptic array is built to implement a fully connected neural network, achieving 94.5% accuracy. Meanwhile, a physical reservoir computing system is constructed using the STM dynamics to directly encode and recognize spatiotemporal features in iris image sequences, achieving 98% accuracy. Through coordinated innovation in materials, devices, and architecture, this work advances memristors from single-function memory elements toward multifunctional, all-electrical intelligent processing units.

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Cite This Study

Song et al. (2026) studied this question.

synapsesocial.com/papers/69b2579096eeacc4fcec63dbhttps://doi.org/10.1063/5.0312026
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