论文标题
几何限制对天际稳定的影响
Effect of Geometric Confinement on the Stabilization of Skyrmions
论文作者
论文摘要
在本文中，我们研究了由于在最近的实验中观察到的几何限制（GC）效应引起的Skyrmions（Skys）的稳定性（SKYS），在纳米域中，Skys仅在边界内出现，并且在低磁场区域稳定。然而，对于天际，GC效应的机制尚不清楚。我们从数值上发现，在标准模型中未观察到这种效果，其中Dzyaloshinskii-Moriya相互作用（DMI）能量在晶格边缘离散，而在离散模型中观察到该效果，其中DMI能量在晶格体积元素上定义。在后一种模型中，与内部相比，表面上的DMI能有效地变得很小。从这个观察结果，我们研究了与外部磁场平行的表面上零DMI能量的模型，并发现在低磁场区域的样品中，天空显着稳定。
In this paper, we study the stability of skyrmions (SKYs) caused by the geometric confinement (GC) effect observed in nano-domains in recent experiments, where SKYs appear only inside the boundary and is stable at the low magnetic field region. However, the mechanism of the GC effect is unclear for skyrmions. We numerically find that this effect is not observed in the standard model, in which the Dzyaloshinskii-Moriya interaction (DMI) energy is discretized on lattice edges, while the effect is observed in a discrete model where the DMI energy is defined on lattice volume elements. In the latter model, the DMI energy on the surfaces effectively becomes very small compared with that of the inside. From this observation, we study a model with zero DMI energy on the surfaces parallel to the external magnetic field and find that SKY is significantly stabilized in the sample in the low magnetic field region.
