We apply a quantum-mechanical approach to study critical current suppression in a superconductor (SC) due to injection of spin-polarized carriers from a ferromagnet (FM) through a FM/SC tunnel junction. It is found that for a given bias voltage, the superconductivity suppression depends strongly on the polarization of the injection current, on the spin-diffusion length in the SC, and on the insulating barrier strength at the FM/SC interface.

中文翻译：

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在铁磁体/超导体隧道结中注入自旋极化载流子

我们应用量子力学方法来研究由于从铁磁体 (FM) 通过 FM/SC 隧道结注入自旋极化载流子而导致的超导体 (SC) 中的临界电流抑制。研究发现，对于给定的偏置电压，超导抑制很大程度上取决于注入电流的极化、SC 中的自旋扩散长度以及 FM/SC 界面的绝缘势垒强度。