Relaxation Process of Spin-Polarized Quasiparticles in a Superconducting Nb Wire
Relaxation Process of Spin-Polarized Quasiparticles in a Superconducting Nb Wire
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超导铌丝中自旋极化准粒子的弛豫过程
DOI：
10.1109/tmag.2021.3083059
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发表时间：
2022
影响因子：
2.1
通讯作者：
Kimura T.
中科院分区：
文献类型：
--
作者：
Iwahori T.;Mizokami K.;Matsuda R.;Ohnishi K.;Kimura T.
研制了一种具有自旋注入终端的介观多端超导铌带。研究了超导Nb中自旋极化对准粒子弛豫过程的影响。非局域电压的位置依赖性提供了准粒子弛豫长度。自旋极化准粒子的弛豫长度比未极化准粒子的弛豫长度增加了12.5%。这一演示为在超导器件中利用自旋电流开辟了一条新的途径。
A mesoscopic multi-terminal superconducting Nb strip with a spin injection terminal has been developed. We investigate the influence of spin polarization on the relaxation process of the quasiparticle in the superconducting Nb. The position dependence of the nonlocal voltage provides the quasiparticle relaxation length. The relaxation length for the spin-polarized quasiparticle is found to show a 12.5% increase from that for the un-polarized quasiparticle. This demonstration opens a new avenue for utilization of the spin current in a superconducting device.