2024-03-29T09:34:44Z
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2022-12-19T03:41:43Z
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Quasiparticle-mediated spin Hall effect in a superconductor
Wakamura, T.
2651
Akaike, H.
2652
Omori, Y.
2653
Niimi, Y.
2654
Takahashi, S.
2655
Fujimaki, A.
2656
Maekawa, S.
2657
Otani, Y.
2658
In some materials the competition between superconductivity and magnetism brings about a variety of unique phenomena such as the coexistence of superconductivity and magnetism in heavy-fermion superconductors or spin-triplet supercurrent in ferromagnetic Josephson junctions. Recent observations of spin–charge separation in a lateral spin valve with a superconductor evidence that these remarkable properties are applicable to spintronics, although there are still few works exploring this possibility. Here, we report the experimental observation of the quasiparticle-mediated spin Hall effect in a superconductor, NbN. This compound exhibits the inverse spin Hall (ISH) effect even below the superconducting transition temperature. Surprisingly, the ISH signal increases by more than 2,000 times compared with that in the normal state with a decrease of the injected spin current. The effect disappears when the distance between the voltage probes becomes larger than the charge imbalance length, corroborating that the huge ISH signals measured are mediated by quasiparticles.
UTokyo Research掲載「超伝導体中で磁気の流れを効率良く電流に変換することに成功」 URI: http://www.u-tokyo.ac.jp/ja/utokyo-research/research-news/efficient-conversion-from-spin-currents-to-charge-currents-in-a-superconductor.html
UTokyo Research "Efficient conversion from spin currents to charge currents in a superconductor" URI: http://www.u-tokyo.ac.jp/en/utokyo-research/research-news/efficient-conversion-from-spin-currents-to-charge-currents-in-a-superconductor.html
journal article
Nature Publishing Group
2015-05-18
application/pdf
Nature Materials Online Edition
14764660
https://repository.dl.itc.u-tokyo.ac.jp/record/711/files/nmat4276.pdf
eng
info:doi/10.1038/nmat4276
http://www.u-tokyo.ac.jp/ja/utokyo-research/research-news/efficient-conversion-from-spin-currents-to-charge-currents-in-a-superconductor.html
http://www.u-tokyo.ac.jp/en/utokyo-research/research-news/efficient-conversion-from-spin-currents-to-charge-currents-in-a-superconductor.html
http://www.nature.com/nmat/journal/vaop/ncurrent/abs/nmat4276.html
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