Abstract The dynamic behavior of individual skyrmions is highly affected by the defects in the materials that host them. Here we develop a theory to account for the effect that defects produce over the skyrmion dynamics. The skyrmion-defect interaction mechanism is explained at an atomic level as a local modification of exchange, Dzyaloshinskii-Moriya (DM) and/or anisotropy interaction. Relevant micromagnetic magnitudes as the energy density and effective magnetic fields arising from the presence of the defect are derived. We also find analytical expressions for the forces exerted by this defect over a skyrmion within Thiele’s rigid approximation. Both point-defects as well as linear defects are considered.

中文翻译：

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孤立的斯格明子与点和线缺陷的相互作用

摘要 单个斯格明子的动态行为受到承载它们的材料缺陷的高度影响。在这里，我们开发了一个理论来解释缺陷对斯格明子动力学产生的影响。Skyrmion-缺陷相互作用机制在原子水平上被解释为交换、Dzyaloshinskii-Moriya (DM) 和/或各向异性相互作用的局部修改。作为能量密度和由缺陷的存在引起的有效磁场的相关微磁量级被导出。我们还在蒂勒的刚性近似中找到了这个缺陷对斯格明子施加的力的解析表达式。点缺陷和线缺陷都被考虑。