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Experimental estimation of spin polarisation in triplet supercurrent

Research Project

Project/Area Number 20K05304
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 29010:Applied physical properties-related
Research InstitutionKindai University (2023)
Kyushu University (2020-2022)

Principal Investigator

Ohnishi Kohei  近畿大学, 理工学部, 准教授 (30722293)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2023: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywordsスピン流 / 超伝導 / スピン偏極準粒子 / スピンバルブ測定 / 準粒子流 / トリプレットクーパー対 / 非局所測定 / 面内構造 / スピントロニクス / トリプレット / スピン偏極率
Outline of Research at the Start

超伝導体中におけるスピン偏極超伝導電流(超伝導スピン流)は、スピントロニクスの省エネルギー性と量子力学的特性を最大限に引き出すものである。本研究では、Fe/Cr層を用いてトリプレットクーパー対の生成を試みるとともに、スピン信号の測定技術を駆使することにより、超伝導電流におけるスピン偏極率を非局所スピンバルブ測定により決定する。さらに、トリプレット超伝導体に同技術を適用することで、そのクーパー対のスピン状態を検証可能とする。これらは、超伝導スピン流のモデル化を可能とし、将来の超伝導スピントロニクスを大きく発展させると期待される。

Outline of Final Research Achievements

Spin-polarized superconducting currents in superconductors maximize the energy-saving and quantum mechanical properties of spintronics. Although this superconducting spin current has recently been realized using triplet Cooper pairs generated at the interface between a ferromagnet and a superconductor with controlled magnetization, direct evidence of a spin-polarized state has not yet been found. In this study, we have clarified the relaxation process of the spin-polarized superconducting current in the superconductor, which enables us to quantitatively measure the spin polarization.

Academic Significance and Societal Importance of the Research Achievements

本研究の成果は、トリプレット超伝導電流を複合ナノ構造中において制御する手法を提案する。未だ微細加工技術が限られたトリプレット超伝導体に代わり、従来の超伝導体を用いてスピン偏極超伝導電流の制御を実現することは、超伝導スピン流のスピンデバイス応用への道を大きく切り拓くものである。また、超伝導電流中のスピン偏極率測定への足掛かりを形成するものであり、将来的な超伝導スピン流のモデル化を可能とし、超伝導スピントロニクスを大きく発展させると期待される。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (42 results)

All 2024 2023 2022 2021 2020 Other

All Int'l Joint Research (1 results) Journal Article (10 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 10 results,  Open Access: 2 results) Presentation (31 results) (of which Int'l Joint Research: 11 results,  Invited: 3 results)

  • [Int'l Joint Research] University of Cambridge(英国)

    • Related Report
      2020 Research-status Report
  • [Journal Article] The positive exchange bias property with hopping switching behavior in van der Waals magnet FeGeTe2022

    • Author(s)
      Hu Shaojie、Cui Xiaomin、Yue Zengji、Wang Pangpang、Guo Lei、Ohnishi Kohei、Wang Xiaolin、Kimura Takashi
    • Journal Title

      2D Materials

      Volume: 9 Issue: 1 Pages: 015037-015037

    • DOI

      10.1088/2053-1583/ac456f

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Experimental Evaluation of 3D Heat Flow Using Magneto‐Thermoelectric Effects in a Ferromagnetic Nanowire2022

    • Author(s)
      Kamruzzaman Md、Hu Shaojie、Ohnishi Kohei、Kimura Takashi
    • Journal Title

      physica status solidi (RRL) ? Rapid Research Letters

      Volume: - Issue: 5 Pages: 2100608-2100608

    • DOI

      10.1002/pssr.202100608

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Relaxation Process of Spin-Polarized Quasiparticles in a Superconducting Nb Wire2022

    • Author(s)
      Iwahori T.、Mizokami K.、Matsuda R.、Ohnishi K.、Kimura T.
    • Journal Title

      IEEE Transactions on Magnetics

      Volume: 58 Issue: 2 Pages: 1-4

    • DOI

      10.1109/tmag.2021.3083059

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Quantitative Evaluation of Heating Effect on Dynamical Spin Injection Using CoFeB/Pt/CoFeB Trilayered Film2022

    • Author(s)
      Obinata S.、Iimori R.、Ohnishi K.、Kimura T.
    • Journal Title

      IEEE Transactions on Magnetics

      Volume: 58 Issue: 2 Pages: 1-4

    • DOI

      10.1109/tmag.2021.3087797

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Influence of heat flow control on dynamical spin injection in CoFeB/Pt/CoFeB trilayer2022

    • Author(s)
      Obinata Sora、Iimori Riku、Ohnishi Kohei、Kimura Takashi
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1 Pages: 3467-3470

    • DOI

      10.1038/s41598-022-06784-6

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Significant suppression of galvanomagnetic signal under dynamical spin injection in CoFeB/Pt bilayer2021

    • Author(s)
      Sora Obinata, Kohei Ohnishi and Takashi Kimura
    • Journal Title

      Applied Physics Letters

      Volume: 118 Issue: 15 Pages: 152401-152401

    • DOI

      10.1063/5.0046601

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Temperature profile of nanospintronic device analyzed by spin-dependent Seebeck effect2021

    • Author(s)
      Kamruzzaman Md、Hu Shaojie、Ohnishi Kohei、Kimura Takashi
    • Journal Title

      Applied Physics Express

      Volume: 14 Issue: 7 Pages: 073004-073004

    • DOI

      10.35848/1882-0786/ac0b05

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Pure Spin Currents Driven by Colossal Spin?Orbit Coupling on Two-Dimensional Surface Conducting SrTiO<sub>3</sub>2021

    • Author(s)
      Jin Mi-Jin、Um Doo-Seung、Ohnishi Kohei、Komori Sachio、Stelmashenko Nadia、Choe Daeseong、Yoo Jung-Woo、Robinson Jason W. A.
    • Journal Title

      Nano Letters

      Volume: 21 Issue: 15 Pages: 6511-6517

    • DOI

      10.1021/acs.nanolett.1c01607

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Effective modulation of spin accumulation using a ferromagnetic/nonmagnetic bilayer spin channel2021

    • Author(s)
      Ariki Taisei、Nomura Tatsuya、Ohnishi Kohei、Kimura Takashi
    • Journal Title

      Journal of Physics D: Applied Physics

      Volume: 55 Issue: 9 Pages: 095302-095302

    • DOI

      10.1088/1361-6463/ac34aa

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Spin-orbit coupling suppression and singlet-state blocking of spin-triplet Cooper pairs2021

    • Author(s)
      Komori Sachio、Devine-Stoneman James M.、Ohnishi Kohei、Yang Guang、Devizorova Zhanna、Mironov Sergey、Montiel Xavier、Olde Olthof Linde A. B.、Cohen Lesley F.、Kurebayashi Hidekazu、Blamire Mark G.、Buzdin Alexandre I.、Robinson Jason W. A.
    • Journal Title

      Science Advances

      Volume: 7 Issue: 3

    • DOI

      10.1126/sciadv.abe0128

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Spin Current Controlled by Superconductor/Normal Metal Interface2024

    • Author(s)
      Kohei Ohnishi
    • Organizer
      10th Annual World Congress of Advanced Materials (WCAM2024)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 超伝導/常伝導体界面によるスピン流制御2023

    • Author(s)
      大西紘平
    • Organizer
      岩手スピン若手研究会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Three-dimensional heat analysis using magneto-thermoelectric effects in a ferromagnetic nanowire2023

    • Author(s)
      Yamada Kazumasa, K. Inoue, Md Kamruzzaman, S. Hu, K. Ohnishi, and T. Kimura
    • Organizer
      24th International Colloquium on Magnetic Films and Surfaces (ICMFS-2022)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Influence of FMR Heating on Dynamical Spin Injection in CoFeB/Pt/CoFeB Trilayer2023

    • Author(s)
      Sora Obinata, Riku Iimori, Kohei Ohnishi, and Takashi Kimura
    • Organizer
      24th International Colloquium on Magnetic Films and Surfaces (ICMFS-2022)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Electric field influence of spin conductivity in CoFeB/Pt/PMN-PT multi-phase structure2023

    • Author(s)
      Hiroto Hitotsukabuto, Riku Iimori, Sora Obinata, Kohei Ohnishi, and Takashi Kimura
    • Organizer
      24th International Colloquium on Magnetic Films and Surfaces (ICMFS-2022)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] The positive exchange bias property with hopping switching behavior in van der Waals magnet FeGeTe2023

    • Author(s)
      Shaojie Hu, Xiaomin Cui, Zengji Yue, Pangpang Wang, Lei Guo, Kohei Ohnishi, Xiaolin Wang, and Takashi Kimura
    • Organizer
      24th International Colloquium on Magnetic Films and Surfaces (ICMFS-2022)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Current-induced domain wall motion in ferrimagnetic Gd-Fe wire2023

    • Author(s)
      Yuichiro Kurokawa, Masakazu Wakae, Masayuki Memita, Uraku Kamihoki, Masahiro Fujimoto, Satoshi Sumi, Hiroyuki Awano, Kohei Ohnishi, and Hiromi Yuasa
    • Organizer
      24th International Colloquium on Magnetic Films and Surfaces (ICMFS-2022)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Spincurrent transports in bilayer spin channels2023

    • Author(s)
      Kohei Mizokami, Kazumasa Yamada, Taisei Ariki, Daiki Ito, Kohei Ohnishi, and Takashi Kimura
    • Organizer
      24th International Colloquium on Magnetic Films and Surfaces (ICMFS-2022)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Strong spin orbit coupling driven pure spin current at defect dominant 2-dimensional conducting SrTiO3 surface2023

    • Author(s)
      Mi-Jin Jin, Doo-Seung Um, Kohei Ohnishi, Sachio Komori, Nadia Stelmashenko, Daeseong Choe, Jung-Woo Yoo, and Jason W.A. Robinson
    • Organizer
      24th International Colloquium on Magnetic Films and Surfaces (ICMFS-2022)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 強磁性共鳴発熱効果により誘引される動的熱スピン注入の定量的評価2023

    • Author(s)
      大日方初良,飯森陸,大西紘平,木村崇
    • Organizer
      日本磁気学会 第46回学術講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] PMN-PT基板を用いたPt/CoFeB二層膜系スピンダイナミクスの電界制御2023

    • Author(s)
      一兜博人,飯森陸,大日方初良,大西紘平,山田和正,木村崇
    • Organizer
      日本磁気学会 第46回学術講演会
    • Related Report
      2022 Research-status Report
  • [Presentation] Nb/Cuオーミック接合における超伝導準粒子吸収効果2023

    • Author(s)
      岩堀拓真,入倉大輔,神本晋作,溝上航平,大西紘平,木村崇
    • Organizer
      日本物理学会 2022年秋季大会
    • Related Report
      2022 Research-status Report
  • [Presentation] 低温で水素吸蔵したPdHx薄膜の電気抵抗測定2023

    • Author(s)
      加藤遼馬,古賀陸生,志賀雅亘,大日方初良,飯盛陸,大西紘平,木村崇,河江達也
    • Organizer
      日本物理学会 2022年秋季大会
    • Related Report
      2022 Research-status Report
  • [Presentation] スピンダイナミクスを基軸にした界面マルチフェロイク構造の評価2023

    • Author(s)
      大西紘平
    • Organizer
      CREST「革新材料開発」 領域会議
    • Related Report
      2022 Research-status Report
  • [Presentation] Ag/Bi 界面におけるラシュバ・エデルシュタイン効果の電気的測定の試み2023

    • Author(s)
      神本晋作,飯森陸,大日方初良,大西紘平,木村崇
    • Organizer
      日本物理学会 第128回九州支部例会
    • Related Report
      2022 Research-status Report
  • [Presentation] マルチフェロイク構造と磁気熱電効果を用いた強誘電体基板の熱伝導率の測定2023

    • Author(s)
      小谷悠太,井上建吾,一兜博人,胡少杰,大西紘平,山田和正,木村崇
    • Organizer
      日本物理学会 第128回九州支部例会
    • Related Report
      2022 Research-status Report
  • [Presentation] 低温水素吸蔵を利用したPd薄膜の電気抵抗測定2023

    • Author(s)
      吉田展一朗,加藤遼馬,古賀陸生,飯森陸,大日方初良,大西紘平,木村崇,河江達也
    • Organizer
      日本物理学会 第128回九州支部例会
    • Related Report
      2022 Research-status Report
  • [Presentation] 低温水素吸蔵を用いたPdHxの超伝導転移の研究2023

    • Author(s)
      加藤遼馬,古賀陸生,吉田展一朗,飯森陸,大日方初良,大西紘平,木村崇,河江達也
    • Organizer
      日本物理学会 第128回九州支部例会
    • Related Report
      2022 Research-status Report
  • [Presentation] PMN-PT 基板を用いた超伝導 Nb 細線における準粒子緩和過程の電界制御2023

    • Author(s)
      入倉大輔,岩堀拓真,大西紘平,木村崇
    • Organizer
      日本物理学会 第128回九州支部例会
    • Related Report
      2022 Research-status Report
  • [Presentation] 超伝導/常伝導体界面によるスピン流制御2023

    • Author(s)
      大西紘平
    • Organizer
      第70回 応用物理学会 春季学術講演会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 低温水素吸蔵で作製したPdHx超伝導体の電気抵抗・磁化測定2023

    • Author(s)
      加藤遼馬,古賀陸生,吉田展一朗,志賀雅亘,飯森陸,大日方初良,大西紘平,木村崇,河江達也
    • Organizer
      日本物理学会 2023年春季大会
    • Related Report
      2022 Research-status Report
  • [Presentation] 電流磁気効果の抑制による動的スピン注入の詳細機構の解明2022

    • Author(s)
      大日方初良,飯森陸,公田悠樹,桝本浩克,大西紘平,木村崇
    • Organizer
      日本物理学会 第77回年次大会
    • Related Report
      2021 Research-status Report
  • [Presentation] ピエゾ効果を用いたスピンホール角の電界変調の試み2022

    • Author(s)
      一兜博人,飯森陸,大日方初良,大西紘平,木村崇
    • Organizer
      日本物理学会 第77回年次大会
    • Related Report
      2021 Research-status Report
  • [Presentation] Relaxation Process of Spin-Polarized Quasiparticles in a Superconducting Nb Wire2021

    • Author(s)
      T. Iwahori, K. Mizokami, R. Matsuda, K. Ohnishi, and T. KimuraT. Iwahori, K. Mizokami, R. Matsuda, K. Ohnishi, and T. Kimura
    • Organizer
      IEEE International Magnetics 2021 (Intermag21)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 超伝導体/常伝導体二層膜におけるスピン流2021

    • Author(s)
      大西紘平
    • Organizer
      第1回「超伝導真空」領域推進研究会
    • Related Report
      2021 Research-status Report
  • [Presentation] Non-local spin transport in superconductor / ferromagnet hybrid lateral structures2021

    • Author(s)
      K. Ohnishi, and T. Kimura
    • Organizer
      7th International Conference on Superconductivity and Magnetism (ICSM2021)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 超伝導体/常伝導体構造におけるスピン流2021

    • Author(s)
      大西紘平
    • Organizer
      CSRNスピン若手交流会 第1回セミナー
    • Related Report
      2021 Research-status Report
  • [Presentation] Nb/Cu二層構造におけるスピン流の輸送特性2021

    • Author(s)
      溝上航平,岩堀拓真,胡少杰,大西紘平,木村崇
    • Organizer
      日本物理学会 第127回九州支部例会
    • Related Report
      2021 Research-status Report
  • [Presentation] 遷移磁性金属細線における横ゼーベック効果の検出2021

    • Author(s)
      井上建吾,溝上航平,胡少杰,山田和正,大西紘平,木村崇
    • Organizer
      日本物理学会 第127回九州支部例会
    • Related Report
      2021 Research-status Report
  • [Presentation] Electric-field control of magnetization process in Co2FeSi/BaTiO3 multiferroic hybrid2021

    • Author(s)
      Shaojie Hu, Shinya Yamada, Po-Chun Chang, Kohei Ohnishi, Kohei Hamaya, Wen-Chin Lin, and Takashi Kimura
    • Organizer
      Materials Research Meeting (MRM) 2021
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Nb系超電導細線における電荷およびスピン不均衡状態の観測2020

    • Author(s)
      大西紘平,岩堀拓真,木村崇
    • Organizer
      Spin-RNJ若手オンライン研究発表会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2025-01-30  

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