论文标题
建模磁性 - 凯里孔系统中的霍尔粘度
Modeling Hall viscosity in magnetic-skyrmion systems
论文作者
论文摘要
磁性天空是拓扑稳定的物体，它是用一堆以平滑方式紧密排列的旋转制成的。它们的拓扑性质提供了异常且复杂的运输特性，例如Skyrmion Hall效应。广泛的霍尔数据进一步揭示了天际和反对者霍尔角之间的不对称性，这无法通过已知的机制来解释。在这里，我们通过利用另一个称为“霍尔粘度”的通用传输系数来解释这种不对称性，该系数在量子厅系统中进行了广泛研究。 HALL粘度是通过稳定的Skyrmions运动模拟的，它通过横向横向速度分量概括硫素方程，并且与Skyrmion电荷无关。我们的分析基于可用的不对称霍尔角数据，揭示了由于天堂霍尔效应，该横向力量占3 \％-5.4 \％的力量。进一步澄清霍尔粘度对于正确设计下一代存储设备至关重要，更不用说我们对自然的基本特性的更深入的了解。
Magnetic skyrmions are topologically stable objects that are made with a bunch of spins tightly arranged in a smooth fashion. Their topological nature provides unusual and complex transport properties, such as the skyrmion Hall effect. Extensive Hall data have further revealed asymmetry between skyrmion and antiskyrmion Hall angles, which cannot be accounted by known mechanisms. Here, we explain this asymmetry by utilizing another universal transport coefficient called `Hall viscosity,' extensively studied in quantum Hall systems. Hall viscosity is modeled in steady-state skyrmions motion by generalizing the Thiele equation with a transverse velocity component and is independent of the skyrmion charge. Our analyses, based on available asymmetric Hall angle data, reveal this transverse force amounts 3\% - 5.4\% of the force due to the skyrmion Hall effect. Further clarification of Hall viscosity will be essential for designing next generation storage devices properly, not to mention for our deeper understanding of fundamental properties of nature.
