标题： 低对称系统中的拓扑梅隆-反梅隆畴壁和斯凯尔米ons 显示英文标题

标题： Topological meron-antimeron domain walls and skyrmions in a low-symmetry system

摘要： 拓扑非平凡磁结构的生成一直是基础和应用纳米磁学研究中的关键课题。 局部非共面磁缺陷，如自旋子或涡旋子，被发现与电流有强烈的相互作用，使其成为未来自旋电子学应用的有趣候选者。 在这里，我们通过自旋极化的扫描隧道显微镜和基于第一性原理计算获得参数的原子自旋模型来研究一种低对称性的体心立方(110)系统。 我们展示了能量项之间的微妙平衡如何根据其晶体学方向生成拓扑平凡和非平凡的畴壁。 拓扑畴壁由涡旋子和反涡旋子组成，拓扑电荷约为0.2/纳米畴壁长度。 薄膜中孔的引入促进了平面铁磁基态向自旋螺旋态的转变。 在施加的磁场下，畴壁和螺旋都会转变为孤立的长形磁自旋子，确立了低对称系统作为自旋纹理工程的多功能平台。 显示英文摘要

摘要： The generation of topologically non-trivial magnetic configurations has been a pivotal topic in both basic and applied nanomagnetism research. Localized non-coplanar magnetic defects such as skyrmions or merons were found to interact strongly with currents, making them interesting candidates for future spintronics applications. Here, we study a low-symmetry bcc(110) system by spin-polarized scanning tunneling microscopy and an atomistic spin model using parameters obtained from first-principles calculations. We demonstrate how a delicate balance between energy terms generates both topologically trivial and non-trivial domain walls, depending on their crystallographic direction. The topological walls consist of merons and antimerons and the topological charge amounts to about 0.2/nm wall length. The incorporation of holes in the films facilitates the transition from an in-plane ferromagnetic ground state to a spin-spiral state. Both domain walls and spirals transition into isolated elongated magnetic skyrmions in applied magnetic fields, establishing low-symmetry systems as a versatile platform for spin-texture engineering.