论文标题
2D磁铁上的超快激光驱动拓扑旋转纹理
Ultrafast laser-driven topological spin textures on a 2D magnet
论文作者
论文摘要
超快激光激发提供了一种有效且低功率的消耗替代方案，因为可以在飞秒（FS）方向上触发和操纵不同的磁性旋转状态。但是，在数据信息平台中已经使用的激光激发是否可以操纵最近发现的二维（2D）Van der Waals（VDW）材料的磁性。在这里，我们表明，Ultrashort激光脉冲（30 $ - $ 85 fs）不仅可以操纵2D-XY CRCL $ _3 $ FERROMAGNET的磁性域，而且还可以诱导拓扑非平凡的Meron和Antimeron Spin纹理的形成和控制。我们观察到这些自旋准颗粒是在激发通过运动，碰撞和an灭的富动力学之后创建的，并在整个表面上发出旋转波。我们的发现突出了使用光子驱动力在2D磁性材料上探索自旋纹理的实质机会，以探测磁光拓扑应用。
Ultrafast laser excitations provide an efficient and low-power consumption alternative since different magnetic properties and topological spin states can be triggered and manipulated at the femtosecond (fs) regime. However, it is largely unknown whether laser excitations already used in data information platforms can manipulate the magnetic properties of recently discovered two-dimensional (2D) van der Waals (vdW) materials. Here we show that ultrashort laser pulses (30$-$85 fs) can not only manipulate magnetic domains of 2D-XY CrCl$_3$ ferromagnets, but also induce the formation and control of topological nontrivial meron and antimeron spin textures. We observed that these spin quasiparticles are created within $\sim$100 ps after the excitation displaying rich dynamics through motion, collision and annihilation with emission of spin waves throughout the surface. Our findings highlight substantial opportunities of using photonic driving forces for the exploration of spin textures on 2D magnetic materials towards magneto-optical topological applications.
