论文标题
超导性增强旋转抽水：Andreev共振的作用
Superconductivity-enhanced spin pumping: Role of Andreev resonances
论文作者
论文摘要
我们描述了一种简单的混合超导体$ | $ $铁磁性绝缘体结构，表现出旋转分辨的andreev结合状态，其中使用动态磁化来探测与自旋相关的物理学。我们表明，在低偏置和低于$ T_C $的情况下，由外部驱动的铁磁绝缘子泵送的自旋角动量的转移受到旋转分解的Andreev结合状态的形成极大地影响。我们的结果表明，这些结合状态捕获了凝结的旋转旋转流的基本物理。对于超导层的有限厚度，可与相干长度相当，谐振andreev结合状态使高度传输子隙自旋传输通道。我们指出，子与传输通道的共振增强剂建立了用于自旋泵送的原型Fabry-Pérot谐振器。
We describe a simple hybrid superconductor$|$ferromagnetic-insulator structure manifesting spin-resolved Andreev bound states in which dynamic magnetization is employed to probe spin related physics. We show that, at low bias and below $T_c$, the transfer of spin angular momentum pumped by an externally driven ferromagnetic insulator is greatly affected by the formation of spin-resolved Andreev bound states. Our results indicate that these bound states capture the essential physics of condensate-facilitated spin flow. For finite thicknesses of the superconducting layer, comparable to the coherence length, resonant Andreev bound states render highly transmitting subgap spin transport channels. We point out that the resonant enhancement of the subgap transport channels establishes a prototype Fabry-Pérot resonator for spin pumping.
