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タイトル: Quasiparticle-mediated spin Hall effect in a superconductor
著者: Wakamura, T.
Akaike, H.
Omori, Y.
Niimi, Y.
Takahashi, S.
Fujimaki, A.
Maekawa, S.
Otani, Y.
発行日: 2015年5月18日
出版者: Nature Publishing Group
掲載誌情報: T. Wakamura, H. Akaike, Y. Omori, Y. Niimi, S. Takahashi, A. Fujimaki, S. Maekawa, and Y. Otani, "Quasiparticle-mediated spin Hall effect in a superconductor", Nature Materials Online Edition: 2015/5/19 (Japan time), doi:10.1038/nmat4276.
関連URI: 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
抄録: 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.
内容記述: 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
URI: http://hdl.handle.net/2261/58894
ISSN: 1476-4660 (online)
出現カテゴリ:014 自然科学
1383010 学術雑誌論文

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