Surface acoustic wave controlled skyrmion-based synapse devices
Surface acoustic wave controlled skyrmion-based synapse devices
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DOI：
10.1088/1361-6528/ac3f14
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发表时间：
2022-03-12
期刊：
影响因子：
3.5
通讯作者：
Lei, Na
中科院分区：
文献类型：
--
作者：
Chen, Chao;Lin, Tao;Lei, Na
磁skyrmions，这是一种类似于粒子的自旋结构，由于其拓扑稳定性和纳米尺寸，是很有前途的神经形态计算设备的信息载体。在这项工作中，我们提出了在神经形态计算设备结构中通过电场激发的表面声波来控制磁skyrmions。我们的微磁模拟表明，创建的skyrmions，它模仿的突触权重参数，单调增加的表面声波的振幅的增加。此外，系统地研究了不同磁参数下的Skyrmion产生效率，并给出了相应的最佳值。最后，短期的可塑性和长期增强的功能证明通过skyrmion激发由一系列的表面声波与不同的时间间隔。声表面波在skyrmionic神经形态计算设备中的应用为低功耗计算系统提供了一种新的方法。
Magnetic skyrmions, which are particle-like spin structures, are promising information carriers for neuromorphic computing devices due to their topological stability and nanoscale size. In this work, we propose controlling magnetic skyrmions by electric-field-excited surface acoustic waves in neuromorphic computing device structures. Our micromagnetic simulations show that the number of created skyrmions, which emulates the synaptic weight parameter, increases monotonically with increases in the amplitude of the surface acoustic waves. Additionally, the efficiency of skyrmion creation is investigated systemically with a wide range of magnetic parameters, and the optimal values are presented accordingly. Finally, the functionalities of short-term plasticity and long-term potentiation are demonstrated via skyrmion excitation by a sequence of surface acoustic waves with different intervals. The application of surface acoustic waves in skyrmionic neuromorphic computing devices paves a novel approach to low-power computing systems.