论文标题
沮丧的天际弦中拓扑螺旋波的非线性动力学
Nonlinear dynamics of topological helicity wave in a frustrated skyrmion string
论文作者
论文摘要
沮丧的磁系统中的天空具有螺旋性的自由度。在沮丧的分层系统中形成了Skyrmion String，该系统由$ XY $模型很好地描述，这是由于相邻层之间的交换耦合。我们考虑一个系统，其中层间交换耦合交替进行，其中二聚$ xy $模型已实现，其线性限制是su-schrieffer-heeger模型。我们认为这是一个非线性拓扑系统。我们研究了旋转螺旋孔的螺旋螺旋性在旋转的最初条件下的螺旋波动力学。它产生一个良好的信号，以检测系统是拓扑还是微不足道。我们的结果表明，在调制的交换耦合系统中，Skyrmion String的螺旋力动力学具有丰富的物理。
A skyrmion in frustrated magnetic system has the helicity degree of freedom. A skyrmion string is formed in a frustrated layered system, which is well described by the $XY$ model owing to the exchange coupling between adjacent layers. We consider a system where the interlayer exchange couplings are alternating, where the dimerized $XY$ model is materialized, whose linear limit is the Su-Schrieffer-Heeger model. We argue that it is a nonlinear topological system. We study the quench dynamics of the helicity wave under the initial condition that the helicity of the skyrmion in the bottommost layer is rotated. It yields a good signal to detect whether the system is topological or trivial. Our results show that the helicity dynamics of the skyrmion string have a rich physics in the modulated exchange-coupled system.
