Abstract
Memristors have emerged as promising candidates for artificial synaptic devices, serving as the building block of brain-inspired neuromorphic computing. In this letter, we developed a Pt/HfO x /Ti memristor with nonvolatile multilevel resistive switching behaviors due to the evolution of the conductive filaments and the variation in the Schottky barrier. Diverse state-dependent spike-timing-dependent-plasticity (STDP) functions were implemented with different initial resistance states. The measured STDP forms were adopted as the learning rule for a three-layer spiking neural network which achieves a 75.74% recognition accuracy for MNIST handwritten digit dataset. This work has shown the capability of memristive synapse in spiking neural networks for pattern recognition application.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (Grant nos. 61504045, 51732003, 61376130), the National Key Research and Development Plan of the MOST of China (2016YFA0203800), and Wuhan Science and Technology Plan (2016010101010005).
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Lu, K., Li, Y., He, WF. et al. Diverse spike-timing-dependent plasticity based on multilevel HfO x memristor for neuromorphic computing. Appl. Phys. A 124, 438 (2018). https://doi.org/10.1007/s00339-018-1847-3
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DOI: https://doi.org/10.1007/s00339-018-1847-3