论文标题
抗铁磁金属中的光诱导的dzyaloshinskii-moriya相互作用
Light-induced Dzyaloshinskii-Moriya interactions in antiferromagnetic metals
论文作者
论文摘要
Dzyaloshinskii-Moriya（DM）相互作用在新型拓扑旋转中起着至关重要的作用，控制这种手性相互作用的能力至关重要。从理论上讲，开发一个通用的微观框架来计算非平衡DM相互作用，我们表明激光脉冲的AC电场成分在相对论的旋转型孤立式coupling的存在下诱导了抗铁磁（AFM）系统中的非平衡静态DM相互作用。这些非平衡DM相互作用甚至可能是各向异性的，具体取决于磁矩的方向和激光脉冲极化。我们进一步表明，强烈的极化激光脉冲可以原则上产生两类的DM相互作用，即，即使晶体对称性禁止在平衡中，即使晶体对称性禁止其中一种，也可以在磁系统中在磁系统中产生两类的DM相互作用。我们的结果揭示了定期驱动的自旋系统和远程平衡磁系统丰富行为的另一个方面。
The Dzyaloshinskii-Moriya (DM) interaction plays an essential role in novel topological spintronics, and the ability to control this chiral interaction is of key importance. Developing a general microscopic framework to compute nonequilibrium DM interactions, we theoretically show that the ac electric field component of a laser pulse induces nonequilibrium static DM interactions in an antiferromagnetic (AFM) system in the presence of relativistic spin-orbit coupling. These nonequilibrium DM interactions might even be anisotropic depending on the direction of magnetic moments and the laser pulse polarization. We further show that intense polarized laser pulses can in principle generate both classes of DM interactions, i.e., bulk-type and interfacial-type, in a magnetic system even though the crystal symmetry prohibits one of them in equilibrium. Our results reveal another aspect of rich behavior of periodically driven spin systems and the far-from-equilibrium magnetic systems.
