论文标题
Skyrmion棘轮传播：利用AC赛道存储设备中的Skyrmion Hall效应
Skyrmion ratchet propagation: Utilizing the skyrmion Hall effect in AC racetrack storage devices
论文作者
论文摘要
磁性天空是具有拓扑保护的旋风状纳米对象。当由直流电流（DC）驱动时，天空会移动，但会经历横向偏转。这种所谓的Skyrmion Hall效应通常被认为是内存应用程序的缺点。本文中，我们表明这种独特的效果也可以有利于自旋的应用：我们表明，在反转对称性破裂的赛道中，Skyrmion Hall效应允许将交替的电流（AC）转换为沿轨道的有向运动，就像在棘轮中一样。我们分析了棘轮机制的几种模式，并表明它对于拓扑磁旋转是独特的。我们详细介绍了与拓扑琐碎的磁对象以及由周期力驱动的经典颗粒相比，我们详细介绍了基本差异。根据确切的赛道几何形状，棘轮机构可以软或严格。在后一种情况下，Skyrmion传播到最大效率。
Magnetic skyrmions are whirl-like nano-objects with topological protection. When driven by direct currents (DC), skyrmions move but experience a transverse deflection. This so-called skyrmion Hall effect is often regarded a drawback for memory applications. Herein, we show that this unique effect can also be favorable for spintronic applications: We show that in a racetrack with a broken inversion symmetry, the skyrmion Hall effect allows to translate an alternating current (AC) into a directed motion along the track, like in a ratchet. We analyze several modes of the ratchet mechanism and show that it is unique for topological magnetic whirls. We elaborate on the fundamental differences compared to the motion of topologically trivial magnetic objects, as well as classical particles driven by periodic forces. Depending on the exact racetrack geometry, the ratchet mechanism can be soft or strict. In the latter case, the skyrmion propagates close to the efficiency maximum.
