论文标题
天空的磁电分类
Magnetoelectric classification of skyrmions
论文作者
论文摘要
我们开发了一种通用理论，可以根据磁性多极端对磁性天空和相关的自旋纹理进行分类。由于现在在绝缘材料中建立了磁性天空，因此磁电磁多物控制线性磁电响应，因此我们的分类为使用施加的电场来操纵天空的磁性提供了一种配方。我们将形式主义应用于不同的螺旋度的天空和抗骨髓，以及磁性bimerons，它们在拓扑（但不是几何上）等同于天际。我们表明，磁电多极和磁电响应张量的非零成分由自旋纹理的拓扑，螺旋和几何形状唯一确定。因此，我们提出了直接的线性磁电响应测量值，作为洛伦兹显微镜的替代方案，以表征绝缘的天空纹理。
We develop a general theory to classify magnetic skyrmions and related spin textures in terms of their magnetoelectric multipoles. Since magnetic skyrmions are now established in insulating materials, where the magnetoelectric multipoles govern the linear magnetoelectric response, our classification provides a recipe for manipulating the magnetic properties of skyrmions using applied electric fields. We apply our formalism to skyrmions and anti-skyrmions of different helicities, as well as to magnetic bimerons, which are topologically, but not geometrically, equivalent to skyrmions. We show that the non-zero components of the magnetoelectric multipole and magnetoelectric response tensors are uniquely determined by the topology, helicity and geometry of the spin texture. Therefore, we propose straightforward linear magnetoelectric response measurements as an alternative to Lorentz microscopy for characterizing insulating skyrmionic textures.
