论文标题
来自什叶派国家的动力扭矩，$ s $ - 波超导体
Dynamical torques from Shiba states in $s$-wave superconductors
论文作者
论文摘要
插入$ S $波超导体中插入的磁杂质会产生称为Shiba状态的自旋偏振状态。我们研究了这些诱发状态的反作用，这些状态在经典时刻的动力学上。我们表明，shiba状态与作用于可以通过铁电磁共振测量值检测到的预进式经典自旋的反应性和耗散扭矩有关。此外，我们强调了散装状态的影响以及志巴态的有限线路对磁化动力学的影响。最后，我们证明扭矩是磁杂质动力学产生的均匀和奇数三重态配对的直接度量。我们的方法提供了用于探测shiba状态的STM技术的无创替代方法。
Magnetic impurities inserted in a $s$-wave superconductor give rise to spin-polarized in-gap states called Shiba states. We study the back-action of these induced states on the dynamics of the classical moments. We show that the Shiba state pertains to both reactive and dissipative torques acting on the precessing classical spin that can be detected through ferromagnetic resonance measurements. Moreover, we highlight the influence of the bulk states as well as the effect of the finite linewidth of the Shiba state on the magnetization dynamics. Finally, we demonstrate that the torques are a direct measure of the even and odd frequency triplet pairings generated by the dynamics of the magnetic impurity. Our approach offers non-invasive alternative to the STM techniques used to probe the Shiba states.
