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Control of spin current transport by using the interface

Research Project

Project/Area Number 17K14077
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Nanostructural physics
Research InstitutionInstitute of Physical and Chemical Research

Principal Investigator

Kondou Kouta  国立研究開発法人理化学研究所, 創発物性科学研究センター, 上級研究員 (60640670)

Project Period (FY) 2017-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Keywordsスピン流生成 / スピン流変換 / ラシュバ効果 / 界面スピン変換 / スピン緩和時間 / スピン流 / 界面ラシュバ効果 / スピン電流変換 / スピンエレクトロニクス
Outline of Final Research Achievements

Interface between oxide and metal materials has broken space inversion symmetry. We investigated the material development of efficient spin current conversion interface and understanding the expression mechanism. So far, we found the efficient spin current conversion at metal/ Bismuth-oxide interfaces. At first, we compared between experimental results and first principle calculation and found that the spin conversion at the interface is caused by Rashba effect. Interestingly the amplitude of Rashba effect strongly depend on shape of electric distribution at interfaces. Based on these findings, we succeeded in efficient spin conversion even at using light-element oxide and metal interfaces.

Academic Significance and Societal Importance of the Research Achievements

スピン流の生成および検出は、磁気メモリなどのスピントロニクス素子を駆動するために重要な現象である。従来までは、金, 白金 タンタルなどの貴金属や重元素を用いることで、その変換効率の向上がなされてきた。今回、物質界面における表面準位に着目することで、これまで注目されてこなかった材料を用いても、従来の変換効率を超えることができることを実験的に実証した。これらの研究成果は、金, 白金どの貴金属を用いないスピントロニクス素子の実現に役立つことが考えられる。

Report

(3 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • Research Products

    (17 results)

All 2018 2017

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (14 results) (of which Int'l Joint Research: 6 results,  Invited: 11 results)

  • [Journal Article] Spin Relaxation Enhanced by Decorating Cu Surfaces With Lead (II) Phthalocyanine Molecules2018

    • Author(s)
      Takizawa S.、Kondou K.、Isshiki H.、Shimose K.、Kawabe T.、Miwa S.、Otani Y.
    • Journal Title

      IEEE Transactions on Magnetics

      Volume: 54 Issue: 11 Pages: 1-4

    • DOI

      10.1109/tmag.2018.2846364

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Efficient spin current generation and suppression of magnetic damping due to fast spin ejection from nonmagnetic metal/indium-tin-oxide interfaces2018

    • Author(s)
      Kondou Kouta、Tsai Hanshen、Isshiki Hironari、Otani YoshiChika
    • Journal Title

      APL Materials

      Volume: 6 Issue: 10 Pages: 101105-101105

    • DOI

      10.1063/1.5050848

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Clear variation of spin splitting by changing electron distribution at non-magnetic metal/Bi2O3 interfaces2018

    • Author(s)
      Tsai Hanshen、Karube Shutaro、Kondou Kouta、Yamaguchi Naoya、Ishii Fumiyuki、Otani Yoshichika
    • Journal Title

      Scientific Reports

      Volume: 8 Issue: 1

    • DOI

      10.1038/s41598-018-23787-4

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Efficient charge-spin interconversion phenomena in various nonmagnetic metal/oxide interfaces2018

    • Author(s)
      K. Kondou, H. Tsai and Y. Otani,
    • Organizer
      5th International Conference of Asian Union of Magnetics Societies
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Efficient charge-spin conversion using surface state2018

    • Author(s)
      K. Kondou and Y. Otani,
    • Organizer
      XXVII International Materials Research Congress,
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Spin-charge conversion in metal/oxide interfaces and topological material2018

    • Author(s)
      K. Kondou
    • Organizer
      One-Day Symposium on Spintronic Properties of Graphene and Related 2D Materials
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Temperature dependence of spin-to-charge conversion and Rashba spin splitting at non-magnetic metal/Bi2O3 interfaces2018

    • Author(s)
      蔡 瀚陞, 近藤 浩太, 大谷 義近,
    • Organizer
      日本物理学会 2018年秋季大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 金属/酸化物界面を用いたスピン流生成および検出2018

    • Author(s)
      近藤 浩太
    • Organizer
      日本磁気学会 第80回ナノマグネティックス専門研究会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Spin to charge current interconversion at NM/Bi2O3 (NM = Cu, Ag, and Au) interfaces,2017

    • Author(s)
      H. Tsai, S. Karube, K. Kondou and Y. Otani,
    • Organizer
      INTERMAG 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Spin-charge conversion at surface state with spin splitting2017

    • Author(s)
      K. Kondou
    • Organizer
      Collaborative Conference on Spin Dynamics
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Charge-spin conversion in topological material and interfaces2017

    • Author(s)
      K. Kondou, S. Nakatsuji and Y. Otani,
    • Organizer
      Progress In Electromagnetic Research Symposium (PIERS) 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Charge-Spin current interconversion phenomena using material interfaces2017

    • Author(s)
      K. Kondou
    • Organizer
      IGER International Symposium on Science of Molecular Assembly and Biomolecular Systems 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 界面におけるスピン分裂を用いた電荷 - スピン変換2017

    • Author(s)
      近藤浩太
    • Organizer
      第78回 応用物理学会秋季学術講演会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 材料界面を用いたスピン流生成と磁化制御2017

    • Author(s)
      近藤 浩太
    • Organizer
      電子情報通信学会 磁気記録・情報ストレージ研究会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 透明電極界面を用いたスピン流生成2017

    • Author(s)
      近藤 浩太, 大谷 義近
    • Organizer
      日本物理学会2017年秋季大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 界面・表面の特異な電子状態を用いた電荷-スピン変換現象2017

    • Author(s)
      近藤 浩太
    • Organizer
      日本磁気学会 第76回ナノマグネティックス専門研究会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 表面・界面を利用したスピン流生成と検出2017

    • Author(s)
      近藤 浩太
    • Organizer
      第2回 ナノスケール磁性体年次大会
    • Related Report
      2017 Research-status Report
    • Invited

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Published: 2017-04-28   Modified: 2020-03-30  

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