论文标题
手性磁铁中的域壁天空
Domain Wall Skyrmions in Chiral Magnets
论文作者
论文摘要
域墙壁天空是被困在域墙内的天空。我们使用完全分析的方法研究了手性磁铁中的域壁天空。通过扰动地处理Dzyaloshinskii-Moriya（DM）相互作用，我们在$ O（3）$ Sigma模型中构建了具有DM相互作用和易于轴潜在项的磁性域壁的低能量有效理论，产生了正弦模型。然后，我们沿着域壁构造域壁空壁，作为正弦的孤子。我们还在一对域壁和抗域壁上构建域壁天空。域壁天空的特征之一是，在域壁内，天空和反kyrmions同样稳定，这与只有其中一个是稳定的大容量不同。
Domain wall skyrmions are skyrmions trapped inside a domain wall. We investigate domain wall skyrmions in chiral magnets using a fully analytic approach. Treating the Dzyaloshinskii-Moriya (DM) interaction perturbatively, we construct the low-energy effective theory of a magnetic domain wall in an $O(3)$ sigma model with the DM interaction and an easy-axis potential term, yielding a sine-Gordon model. We then construct domain wall skyrmions as sine-Gordon solitons along the domain wall. We also construct domain wall skyrmions on top of a pair of a domain wall and an anti-domain wall. One of characteristic feature of domain wall skyrmions is that both skyrmions and anti-skyrmions are equally stable inside the domain wall, unlike the bulk in which only one of them is stable.
