论文标题
超薄铁磁膜中的不对称Skyrmion-Antiskyrmion生产
Asymmetric skyrmion-antiskyrmion production in ultrathin ferromagnetic films
论文作者
论文摘要
具有沮丧交换的超薄铁磁体和dzyaloshinskii-moriya的相互作用可以支持拓扑孤子，例如天空和抗微米，它们是可稳态的，可以被视为粒子 - 安属粒子对应物。当施加自旋轨道扭矩时，超出其步行器极限的孤立动脉矩阵的运动可以产生Skyrmion-Antiskyrmion对。在这里，我们使用原子旋转动力学模拟来阐明该对生成中涉及的散射过程。在某些条件下，这些颗粒和反颗粒的增殖可以以生长速率和生产不对称的形式出现，这取决于手性相互作用的强度以及自旋轨道扭矩的耗散成分。这些特征在很大程度上取决于反对者之间的散射过程，而反对者可能会弹性或导致结合状态或歼灭。
Ultrathin ferromagnets with frustrated exchange and the Dzyaloshinskii-Moriya interaction can support topological solitons such as skyrmions and antiskyrmions, which are metastable and can be considered particle-antiparticle counterparts. When spin-orbit torques are applied, the motion of an isolated antiskyrmion driven beyond its Walker limit can generate skyrmion-antiskyrmion pairs. Here, we use atomistic spin dynamics simulations to shed light on the scattering processes involved in this pair generation. Under certain conditions a proliferation of these particles and antiparticles can appear with a growth rate and production asymmetry that depend on the strength of the chiral interactions and the dissipative component of the spin-orbit torques. These features are largely determined by scattering processes between antiskyrmions, which can be elastic or result in bound states or annihilation.
