论文标题
共线性抗fiferromagnets中光激发木元的非线性自旋电流
Nonlinear spin current of photoexcited magnons in collinear antiferromagnets
论文作者
论文摘要
我们研究了与反转对称性断裂的共线性抗铁磁铁在光照射下通过AC电场诱导的非线性镁自旋电流。对于线性极化的光，我们发现DC旋转电流通过``镁旋转转移电流''机制出现，这是由于两个镁创造过程中的自旋极化产生而驱动的，并且与通过浆果连接的镁带的几何形状有着密切的关系。用于循环光的磁带的几何形状，用于循环光的光线，dc旋转通过``dc旋转''的范围较大的启发式启动式启动时，当时的机械范围是``启发''机制，这是一个机械的机制，该机械是构成的。镁寿命很长。我们基于一些玩具型号和多种表色材料M $ _2 $ MO $ $ _3 $ o $ o $ _8 $的逼真的模型，展示了镁旋转转移和注入电流的生成。
We study the nonlinear magnon spin current induced by an ac electric field under light irradiation in collinear antiferromagnets with broken inversion symmetry. For linearly polarized light, we find that a dc spin current appears through ``the magnon spin shift current" mechanism, which is driven by a spin polarization generation in the two magnon creation process and has a close relationship to the geometry of magnon bands through Berry connection. For circularly polarized light, a dc spin current appears through ``the spin injection current" mechanism, which is proportional to the relaxation time of magnons and can be large when the magnon lifetime is long. We demonstrate generation of the magnon spin shift and injection currents, based on a few toy models and a realistic model for a multiferroic material M$_2$Mo$_3$O$_8$.
