Experimental Realization of a Skyrmion Circulator,Nano Letters

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Experimental Realization of a Skyrmion Circulator
Nano Letters ( IF 9.6 ) Pub Date : 2022-11-21 , DOI: 10.1021/acs.nanolett.2c03789
Chengkun Song _{1,

2,

3} , Le Zhao _{1,

2,

3} , Jiahao Liu _{1,

2,

3,

4} , Wanjun Jiang _{1,

2,

3}

Affiliation

Magnetic skyrmions are mobile topological spin textures that can be manipulated by different means. Their applications have been frequently discussed in the context of information carriers for racetrack memory devices, which on the other hand, exhibit a skyrmion Hall effect as a result of the nontrivial real-space topology. While the skyrmion Hall effect is believed to be detrimental for constructing racetrack devices, we show here that it can be implemented for realizing a three-terminal skyrmion circulator. In analogy to the microwave circulator, nonreciprocal transportation and circulation of skyrmions are studied both numerically and experimentally. In particular, successful control of the circulating direction of being either clockwise or counterclockwise is demonstrated, simply by changing the sign of the topological charge. Our studies suggest that the topological property of skyrmions can be incorporated for enabling novel spintronic functionalities; the skyrmion circulator is just one example.

中文翻译：

Skyrmion环行器的实验实现

磁性斯格明子是可以通过不同方式操纵的移动拓扑自旋纹理。它们的应用在赛道存储设备的信息载体的背景下经常被讨论，另一方面，由于非平凡的实空间拓扑，它表现出斯格明子霍尔效应。虽然 skyrmion 霍尔效应被认为不利于构建赛道设备，但我们在这里展示了它可以用于实现三端 skyrmion 环行器。类似于微波循环器，在数值和实验上都研究了 skyrmions 的单向传输和循环。特别是，只需改变拓扑电荷的符号，就可以成功控制顺时针或逆时针的循环方向。我们的研究表明，可以结合 skyrmions 的拓扑特性来实现新的自旋电子功能；skyrmion 循环器只是一个例子。

更新日期：2022-11-21

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