Magnetic skyrmions are expected to offer novel functionalities in emerging magnetic devices. However, when the skyrmion moves along a nanotrack, its trajectory is generally curved by the skyrmion Hall effect, resulting in an annihilation of skyrmion at the edge. Here we propose a method to avoid this edge-induced skyrmion annihilation. We found that the annihilation of skyrmion is largely suppressed when we replace the conventional edge with a chiral domain wall boundary, due to topological repulsion. We also provide device architectures that enable the guiding, sorting and size-tuning of multiple skyrmions, which could be potentially useful for future skyrmion devices.

中文翻译：

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使用手性磁畴壁引导动态斯格明子

磁性斯格明子有望在新兴的磁性设备中提供新的功能。然而，当斯格明子沿着纳米轨道运动时，其轨迹一般会因斯格明子霍尔效应而弯曲，导致斯格明子在边缘处湮灭。在这里，我们提出了一种避免这种边缘引起的斯格明子湮灭的方法。我们发现，由于拓扑排斥，当我们用手性畴壁边界替换传统边缘时，skyrmion 的湮灭在很大程度上受到抑制。我们还提供了能够引导、排序和调整多个斯格明子的设备架构，这可能对未来的斯格明子设备有用。