论文标题
沮丧的双龙：静态结构和动力学
A Frustrated Bimeronium: Static Structure and Dynamics
论文作者
论文摘要
我们显示了带有面内磁化的磁铁中的拓扑自旋纹理。它是垂直磁化磁铁中Skyrmionium的拓扑对应物，可以看作是两个具有相反拓扑电荷的Bimeron的组合。我们报告了具有沮丧的交换相互作用的磁性单层中分离的双甲铵的静态结构和自旋轨道诱导的动力学。我们研究静态双龙的各向异性和磁场依赖性。我们还探索了由阻尼状的旋转轨道扭矩驱动的双龙动力学。我们发现，当自旋极化方向平行于易于轴时，双锥形显示出稳定的旋转。此外，当自旋极化方向垂直于易于轴时，我们证明了双龙的歼灭。我们的结果对理解双龙结构的基本特性很有用，并且可以提供一种构建基于双龙的旋转器设备的方法。
We show a topological spin texture called "bimeronium" in magnets with in-plane magnetization. It is a topological counterpart of skyrmionium in perpendicularly magnetized magnets and can be seen as a combination of two bimerons with opposite topological charges. We report the static structure and spin-orbit-torque-induced dynamics of an isolated bimeronium in a magnetic monolayer with frustrated exchange interactions. We study the anisotropy and magnetic field dependences of a static bimeronium. We also explore the bimeronium dynamics driven by the damping-like spin-orbit torque. We find that the bimeronium shows steady rotation when the spin polarization direction is parallel to the easy axis. Moreover, we demonstrate the annihilation of the bimeronium when the spin polarization direction is perpendicular to the easy axis. Our results are useful for understanding fundamental properties of bimeronium structures and may offer an approach to build bimeronium-based spintronic devices.
