标题： 电流驱动的反铁磁畴壁斯格明子动力学 显示英文标题

标题： Current-driven dynamics of antiferromagnetic domain-wall skyrmions

摘要： 磁畴壁斯格明子是嵌入在磁畴壁中的磁性孤子，它们在拓扑上等价于斯格明子。 在这里，我们理论上研究了反铁磁磁畴壁斯格明子及其在朗道-利夫希茨-吉尔伯特现象学中的电流驱动运动，并通过微磁模拟验证了我们的发现。 尽管在反铁磁磁畴壁斯格明子的电流诱导运动中预期会抑制斯格明子霍尔效应，但我们观察到一个有限的霍尔角，这源于磁畴壁斯格明子的各向异性自旋构型。 然而，斯格明子霍尔效应是在某些条件下被抑制的，并且运动与施加在特定方向上的电流一致，这可以解释为磁畴壁斯格明子的主要轴，这些轴可以从自旋构型的对称性中轻易识别。 我们关于反铁磁磁畴壁斯格明子的工作表明，具有多个孤子特征的自旋纹理的动力学可能是非常规的，这预示着它将丰富拓扑孤子领域。 显示英文摘要

摘要： Domain-wall skyrmions are magnetic solitons embedded in a domain wall that are topologically equivalent to skyrmions. Here, we theoretically study antiferromagnetic domain-wall skyrmions and their current-driven motion within the Landau-Lifshitz-Gilbert phenomenology, and verify our findings with micromagnetic simulations. While the skyrmion Hall effect is expected to be suppressed in the current-induced motion of antiferromagnetic domain-wall skyrmions, we observe a finite Hall angle, which originates from the anisotropic spin configuration of domain-wall skyrmions. The skyrmion Hall effect is, however, conditionally suppressed and the motion aligns with the current applied in certain directions, which can be interpreted as principal axes of a domain-wall skyrmion that is easily identified from the symmetry of the spin configuration. Our work on antiferromagnetic domain-wall skyrmions shows that the dynamics of spin textures endowed with multiple soliton characteristics can be unconventional, which is envisaged to enrich the field of topological solitons.