论文标题
超快天际激发的微观理论通过光线激发
Microscopic Theory of Ultrafast Skyrmion Excitation by Light
论文作者
论文摘要
我们提出了一种通过两轨电子模型的超快skyrmion光启示的微观机制。在强相关性限制中，$ D $ -Electrons由有效的Hamiltonian描述，通过$ S-D $ Exchange与流行$ S $ -Electrons结合。通过直接耦合到电荷的激光驱极激发系统，导致在100 FS的时间尺度上产生Skyrmion成核。通过Rashba自旋轨道相互作用介导的光诱导的电子电流和磁矩之间的耦合被确定为超快光泽兴奋的显微机制。
We propose a microscopic mechanism for ultrafast skyrmion photo-excitation via a two-orbital electronic model. In the strong correlation limit the $d$-electrons are described by an effective spin Hamiltonian, coupled to itinerant $s$-electrons via $s-d$ exchange. Laser-exciting the system by a direct coupling to the electric charge leads to skyrmion nucleation on a 100 fs timescale. The coupling between photo-induced electronic currents and magnetic moments, mediated via Rashba spin-orbit interactions, is identified as the microscopic mechanism behind the ultrafast optical skyrmion excitation.
