Frequency synaptic behavior of ZnO/HfZrO memristor with pulsed stimuli

The synaptic response of ZnO/HfZrO memristor devices to electrical stimuli was studied. It was found that the frequency of the stimuli affects the rate of current increase, which can be explained by the cluster state of oxygen vacancies at the interface of ZnO/HfZrO. This variation in the synaptic r...

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Published in:Applied physics letters 2024-08, Vol.125 (8)
Main Authors: Lu, Jie, Xiang, Zeyang, Wang, Kexiang, Wang, Ziyu, Shi, Si, Liu, Zuming, Chen, Xiran, Hu, Xinyu, Jiang, Ran
Format: Article
Language:English
Subjects:
Bionics
Electrical stimuli
Frequency variation
Memristors
Nervous system
Service life assessment
Zinc oxide
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container_title Applied physics letters
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Xiang, Zeyang
Wang, Kexiang
Wang, Ziyu
Shi, Si
Liu, Zuming
Chen, Xiran
Hu, Xinyu
Jiang, Ran
description The synaptic response of ZnO/HfZrO memristor devices to electrical stimuli was studied. It was found that the frequency of the stimuli affects the rate of current increase, which can be explained by the cluster state of oxygen vacancies at the interface of ZnO/HfZrO. This variation in the synaptic response due to stimulus frequency was consistent with the dynamic adjustment of tolerance thresholds observed in the human brain's response to environmental stimuli. The rate of change in current, representing the sensitivity to stimuli, mirrors the biological nervous system's reaction to environmental changes, such as Ebbinghaus forgetting behavior. Additionally, frequent irregular changes in stimuli lead to a reduced lifespan of the devices, highly resembling the biological lifetime-injure on frequent environmental fluctuations. These findings highlight the memristors' significant similarity to biological nerves in response to stimuli, confirming their tremendous potential in bionic synaptic simulation applications.
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subjects Bionics
Electrical stimuli
Frequency variation
Memristors
Nervous system
Service life assessment
Zinc oxide
title Frequency synaptic behavior of ZnO/HfZrO memristor with pulsed stimuli
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