Magnetic skyrmion-based synaptic devices
Magnetic skyrmion-based synaptic devices
复制标题
DOI：
10.1088/1361-6528/aa5838
复制
发表时间：
2017-02-24
期刊：
影响因子：
3.5
通讯作者：
Zhao, Weisheng
中科院分区：
文献类型：
--
作者：
Huang, Yangqi;Kang, Wang;Zhao, Weisheng
磁性Skyrmions是下一代信息载体的有希望的候选者，由于它们的小尺寸，拓扑稳定性和超低的脱钉电流密度。最近提出了各种各样的skyrmionic设备的概念和原型，突出了它们的潜在应用。此外，skyrmions的固有特性使传统电子设备无法访问的新功能成为可能。在这里，我们报告的skyrmion为基础的人工突触装置的神经形态系统。所提出的设备的突触重量可以通过正/负刺激来加强/减弱，模仿生物突触的增强/抑制过程。短时程可塑性和长时程增强功能已被证明与微磁模拟。这一提议为具有自适应学习功能的神经形态系统中的突触装置提供了新的可能性。
Magnetic skyrmions are promising candidates for next-generation information carriers, owing to their small size, topological stability, and ultralow depinning current density. A wide variety of skyrmionic device concepts and prototypes have recently been proposed, highlighting their potential applications. Furthermore, the intrinsic properties of skyrmions enable new functionalities that may be inaccessible to conventional electronic devices. Here, we report on a skyrmion-based artificial synapse device for neuromorphic systems. The synaptic weight of the proposed device can be strengthened/weakened by positive/negative stimuli, mimicking the potentiation/depression process of a biological synapse. Both short-term plasticity and long-term potentiation functionalities have been demonstrated with micromagnetic simulations. This proposal suggests new possibilities for synaptic devices in neuromorphic systems with adaptive learning function.