论文标题
通过激光激发的抗铁磁铁在电子动力学中驱动旋转手性
Driving spin chirality by electron dynamics in laser-excited antiferromagnets
论文作者
论文摘要
复杂的旋转纹理的光学生成是现代旋转的最令人兴奋的挑战之一。在这里，我们发现了一种独特的物理机制，可以将自旋手性烙印到具有短激光脉冲的共线磁体中。通过同时处理电子结构和磁性的激光命令演变，我们表明它们的相互交织的动力学可以导致准稳定的手性态的出现。我们发现，激光驱动的手性不需要任何辅助外部场或固有的自旋轨道相互作用，即使在存在热波动的情况下，它也可以在纳米连续的时间尺度上生存，这使得被发现的机制与理解对磁性材料的各种光学实验有关。我们的发现对复杂的手性磁性与光的相互作用开辟了新的视角。
Optical generation of complex spin textures is one of the most exciting challenges of modern spintronics. Here, we uncover a distinct physical mechanism for imprinting spin chirality into collinear magnets with short laser pulses. By simultaneously treating the laser-ignited evolution of electronic structure and magnetic order, we show that their intertwined dynamics can result in an emergence of quasi-stable chiral states. We find that laser-driven chirality does not require any auxiliary external fields or intrinsic spin-orbit interaction to exist, and it can survive on the time scale of nanoseconds even in the presence of thermal fluctuations, which makes the uncovered mechanism relevant for understanding various optical experiments on magnetic materials. Our findings open a new perspective at the interaction of complex chiral magnetism with light.
