中国物理B ›› 2022, Vol. 31 ›› Issue (1): 18503-018503.doi: 10.1088/1674-1056/ac05b0
Ming-Min Zhu(朱明敏)†, Shu-Ting Cui(崔淑婷)†, Xiao-Fei Xu(徐晓飞), Sheng-Bin Shi(施胜宾), Di-Qing Nian(年迪青), Jing Luo(罗京), Yang Qiu(邱阳), Han Yang(杨浛), Guo-Liang Yu(郁国良)‡, and Hao-Miao Zhou (周浩淼)§
Ming-Min Zhu(朱明敏)†, Shu-Ting Cui(崔淑婷)†, Xiao-Fei Xu(徐晓飞), Sheng-Bin Shi(施胜宾), Di-Qing Nian(年迪青), Jing Luo(罗京), Yang Qiu(邱阳), Han Yang(杨浛), Guo-Liang Yu(郁国良)‡, and Hao-Miao Zhou (周浩淼)§
摘要: Voltage-controlled magnetic skyrmions have attracted special attention because they satisfy the requirements for well-controlled high-efficiency and energy saving for future skyrmion-based neuron device applications. In this work, we propose a compact leaky-integrate-fire (LIF) spiking neuron device by using the voltage-driven skyrmion dynamics in a multiferroic nanodisk structure. The skyrmion dynamics is controlled by well tailoring voltage-induced piezostrains, where the skyrmion radius can be effectively modulated by applying the piezostrain pulses. Like the biological neuron, the proposed skyrmionic neuron will accumulate a membrane potential as skyrmion radius is varied by inputting the continuous piezostrain spikes, and the skyrmion radius will return to the initial state in the absence of piezostrain. Therefore, this skyrmion radius-based membrane potential will reach a definite threshold value by the strain stimuli and then reset by removing the stimuli. Such the LIF neuronal functionality and the behaviors of the proposed skyrmionic neuron device are elucidated through the micromagnetic simulation studies. Our results may benefit the utilization of skyrmionic neuron for constructing the future energy-efficient and voltage-tunable spiking neural networks.
中图分类号: (Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields)