论文标题
$ s $ -d $ d $轨道杂交重金属的旋转混合电导的增强
Enhancement of spin mixing conductance by $s$-$d$ orbital hybridization in heavy metals
论文作者
论文摘要
在磁性多层中，局部磁化动力学和巡回传导旋转之间的自旋转移来自正常金属与相邻铁磁层之间的相互作用。然后，旋转电导率控制自旋转移扭矩，并在磁性界面上旋转泵送。磁性接口上自旋电导电导的理论描述通常采用单个传导带模型。但是，在重型过渡金属的传导$ s $电子和局部$ d $电子之间存在轨道杂交，其中单个传导波段模型不足以描述$ s $ -d $ d $ d $ orbital的杂交。在这项工作中，使用广义的安德森模型，我们估计$ S $ -D $ d $轨道杂交产生的旋转电导。我们发现轨道杂交增加了旋转电导的幅度。
In a magnetic multilayer, the spin transfer between localized magnetization dynamics and itinerant conduction spin arises from the interaction between a normal metal and an adjacent ferromagnetic layer. The spin-mixing conductance then governs the spin-transfer torques and spin pumping at the magnetic interface. Theoretical description of spin-mixing conductance at the magnetic interface often employs a single conduction-band model. However, there is orbital hybridization between conduction $s$ electron and localized $d$ electron of the heavy transition metal, in which the single conduction-band model is insufficient to describe the $s$-$d$ orbital hybridization. In this work, using the generalized Anderson model, we estimate the spin-mixing conductance that arises from the $s$-$d$ orbital hybridization. We find that the orbital hybridization increases the magnitude of the spin-mixing conductance.
