Relaxation Process of Spin-Polarized Quasiparticles in a Superconducting Nb Wire

T. Iwahori; K. Mizokami; R. Matsuda; K. Ohnishi; T. Kimura

doi:10.1109/TMAG.2021.3083059

Relaxation Process of Spin-Polarized Quasiparticles in a Superconducting Nb Wire

T. Iwahori, K. Mizokami, R. Matsuda, K. Ohnishi, T. Kimura

Condensed Matter Physics

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Journal	IEEE Transactions on Magnetics
Volume	58
Issue number	2
DOIs	https://doi.org/10.1109/TMAG.2021.3083059
Publication status	Published - Feb 1 2022

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

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10.1109/TMAG.2021.3083059

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abstract = "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.",

author = "T. Iwahori and K. Mizokami and R. Matsuda and K. Ohnishi and T. Kimura",

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AU - Iwahori, T.

AU - Mizokami, K.

AU - Matsuda, R.

AU - Ohnishi, K.

AU - Kimura, T.

PY - 2022/2/1

Y1 - 2022/2/1

N2 - 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.

AB - 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.

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Relaxation Process of Spin-Polarized Quasiparticles in a Superconducting Nb Wire

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