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arXiv 2305.18525cond-mat.mes-hallcond-mat.supr-con
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自旋分裂超导体中的逆自旋霍尔效应与自旋交换

Inverse spin-Hall effect and spin-swapping in spin-split superconductors

Lina Johnsen Kamra, Jacob Linder

AI总结:

本文研究了自旋劈裂超导体中由自旋轨道散射产生的逆自旋霍尔与自旋交换效应,发现该体系能产生比普通信号强数个数量级且可由劈裂场取向控制的长程信号,大幅提升了自旋探测灵敏度并可用于设计新型自旋器件。

摘要:

当自旋劈裂场被引入薄膜超导体时,沿该场极化的自旋电流与能量电流耦合,后者只能通过非弹性散射来衰减。我们研究了向这种超导体注入自旋和能量的过程,其中自旋轨道杂质散射会产生逆自旋霍尔和自旋交换电流。我们证明,自旋劈裂场、超导性和非弹性散射的共同存在,不仅强烈增强了普通的逆自旋霍尔效应,还产生了比普通逆自旋霍尔信号强数个数量级的独特逆自旋霍尔和自旋交换信号。这些信号可以完全由自旋劈裂场的取向来控制,从而产生长程的电荷和自旋积累,其可探测距离比正常态下距离注入器更远。虽然增强的逆自旋霍尔信号大幅提升了自旋探测的灵敏度,但独特的自旋交换信号可用于设计在整个几何结构中同时控制和改变自旋与电流方向的器件。

英文摘要:

When a spin-splitting field is introduced to a thin film superconductor, the spin currents polarized along the field couples to energy currents that can only decay via inelastic scattering. We study spin and energy injection into such a superconductor where spin-orbit impurity scattering yields inverse spin-Hall and spin-swapping currents. We show that the combined presence of a spin-splitting field, superconductivity, and inelastic scattering gives rise to a strong enhancement of the ordinary inverse spin-Hall effect, as well as unique inverse spin-Hall and spin-swapping signals orders of magnitude stronger than the ordinary inverse spin-Hall signal. These can be completely controlled by the orientation of the spin-splitting field, resulting in a long-range charge and spin accumulations detectable much further from the injector than in the normal-state. While the enhanced inverse spin-Hall signals offer a major improvement in spin detection sensitivity, the unique spin-swap signals can be utilized for designing devices where both the spin and current directions are controlled and altered throughout the geometry.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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