论文标题
有限频率自旋敏感性和旋转轨道放松的超导体中的旋转泵
Finite-frequency spin susceptibility and spin pumping in superconductors with spin-orbit relaxation
论文作者
论文摘要
在A.A.的开创性工作中计算了具有自旋轨道弛豫的超导体的静态自旋敏感性。 Abrikosov和L.P. Gor'kov [Sov。物理。 Jetp，{\ bf 15}，752（1962）]。令人惊讶的是，尽管对于超导Spintronics的现代主题非常重要，但该结果对有限频率的概括尚未完成。本文通过得出自旋敏感性的分析表达来填补这一空白。时间依赖性的自旋响应被证明是由与普通和自旋轨道散射相对应的碰撞积分的准经典Eilenberger方程捕获的。使用发达的形式主义，我们研究了铁磁体和相邻超导膜之间的线性自旋泵浦效应。讨论了了解最新实验的后果，该实验表明通过超导相关性改变了吉尔伯特阻尼。
Static spin susceptibility of superconductors with spin-orbit relaxation has been calculated in the seminal work of A.A. Abrikosov and L.P. Gor'kov [Sov. Phys. JETP, {\bf 15}, 752 (1962)]. Surprisingly the generalization of this result to finite frequencies has not been done despite being quite important for the modern topic of superconducting spintronics. The present paper fills this gap by deriving the analytical expression for spin susceptibility. The time-dependent spin response is shown to be captured by the quasiclassical Eilenberger equation with collision integrals corresponding to the ordinary and spin-orbit scattering. Using the developed formalism we study the linear spin pumping effect between the ferromagnet and the adjacent superconducting film. The consequences for understanding recent experiments demonstrating the modification of Gilbert damping by the superconducting correlations are discussed.
