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Dynamics of Josephson vortex induced in mesoscopic high-Tc superconductors and the artificial control

Research Project

Project/Area Number 19K05256
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 InstitutionNational Institute for Materials Science

Principal Investigator

OOI Shuuichi  国立研究開発法人物質・材料研究機構, 国際ナノアーキテクトニクス研究拠点, 主任研究員 (10354292)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2019: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywords固有ジョセフソン接合 / ジョセフソン磁束 / パンケーキ磁束 / 磁気量子振動 / 磁気光学イメージング / 磁束量子 / Bi2212 / vortex / Josephson junction / SQUID / 銅酸化物高温超伝導体
Outline of Research at the Start

層状高温超伝導体Bi2212単結晶では、幅数ミクロン以下まで微小化すると磁気抵抗測定により磁場が一本一本量子化されて侵入する様子を検知できる。さらに最近、単一孔導入により綺麗な磁気量子振動が現れることが分かってきた。様相は従来の超伝導量子干渉計(SQUID)と似ているが、メカニズムが異なり興味深い。
本研究では、両面微細加工により3次元的に試料形状を工夫すること、およびモードロック共鳴やノイズ測定等の動的測定により、この磁気抵抗振動と、誘起されたジョセフソン磁束やパンケーキ磁束の状態やダイナミクスの関係を理解し、新規な超伝導磁束量子デバイスへとつなげる。

Outline of Final Research Achievements

The copper oxide high-Tc superconductor Bi2212 single crystal incorporates an atomic layer Josephson junction (intrinsic Josephson junction). Since junction resistance is considered to be related to the dynamics of Josephson vortex induced by pancake vortex penetration, we measured the in-plane magnetoresistance of micro Bi2212 single crystals fabricated in various shapes to obtain static and dynamic information on the vortex arrangement and respective penetration processes. We also studied the magnetic quantum oscillation phenomenon that appears when a single hole is introduced. Furthermore, along with the study of sample fabrication methods, we also worked on visualization and control of vortex states by magneto-optical imaging and obtained certain results, such as showing the possibility of vortex control in Bi2212 by vortices in different superconductors.

Academic Significance and Societal Importance of the Research Achievements

狭い領域に閉じ込められた相互作用する粒子系の普遍的性質を調べる上で、微小Bi2212におけるパンケーキ磁束およびジョセフソン磁束系は、固有ジョセフソン接合の電気特性を通してその状態を知ることができる独特な研究対象の一つである。様々な形状に加工されたBi2212単結晶の固有ジョセフソン接合特性を通して、2種類の磁束量子によって生み出される静的・動的な磁束の振る舞いについて理解を深めることができた。さらに、直接磁束状態を可視化する試みにより、磁束量子制御につながる成果を得ることができた。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (12 results)

All 2022 2021 2020 2019 Other

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (8 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results) Remarks (2 results)

  • [Journal Article] Observation of intermediate mixed state in high-purity cavity-grade Nb by magneto-optical imaging2021

    • Author(s)
      Ooi S.、Tachiki M.、Konomi T.、Kubo T.、Kikuchi A.、Arisawa S.、Ito H.、Umemori K.
    • Journal Title

      Physical Review B

      Volume: 104 Issue: 6 Pages: 064504-064504

    • DOI

      10.1103/physrevb.104.064504

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Geometrical matching and its influence on the melting transition of confined vortices in a mesoscopic triangle of Bi2Sr2CaCu2O8+y superconductor2019

    • Author(s)
      Ooi S.、Tachiki M.、Mochiku T.、Komori K.、Hirata K.、Arisawa S.
    • Journal Title

      Physical Review B

      Volume: 100 Issue: 14 Pages: 144509-144509

    • DOI

      10.1103/physrevb.100.144509

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] 固有ジョセフソン接合で探るBi2212の磁束状態2022

    • Author(s)
      大井修一
    • Organizer
      電子情報通信学会2022年総合大会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 希塩酸処理によるBi2212超薄膜化2022

    • Author(s)
      大井 修一, 立木 実, 茂筑 高士, 有沢 俊一
    • Organizer
      日本物理学会 第77回年次大会(2022年)
    • Related Report
      2021 Annual Research Report
  • [Presentation] Observation of intermediate mixed state in high-purity cavity grade Nb by MO imaging and its implication to flux trapping mechanism2022

    • Author(s)
      OOI, Shuuichi, TACHIKI, Minoru, KIKUCHI, Akihiro, ARISAWA, Shunichi, T. Konomi, T. Kubo, H. Ito, E. Kako, H. Sakai, K. Umemori
    • Organizer
      TTC 2022, TESLA Technology Collaboration
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Magneto-optical imaging of vortex bundles in high purity Nb2021

    • Author(s)
      OOI, Shuuichi, TACHIKI, Minoru, KIKUCHI, Akihiro, ARISAWA, Shunichi, T. Konomi, T. Kubo, H. Ito, E. Kako, H. Sakai, K. Umemori
    • Organizer
      34th International Symposium on Superconductivity (ISS2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 磁気光学イメージング法による超高純度ニオブの磁束状態観測2021

    • Author(s)
      大井 修一, 立木 実, 菊池 章弘, 有沢 俊一, 許斐太郎, 井藤隼人, 久保毅幸, 加古永治, 阪井寛志, 梅森健成
    • Organizer
      日本物理学会 2021年秋季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 高純度ニオブにおける vortex bundle の磁気光学観察2021

    • Author(s)
      大井修一、立木実、菊池章弘、有沢俊一、許斐太郎、井藤隼人、加古永治、阪井 寛志、梅森健成
    • Organizer
      日本物理学会 第76回年次大会
    • Related Report
      2020 Research-status Report
  • [Presentation] Observation of Vortex Bundles in Type-II/1 Superconductor Niobium by Magneto-optical Imaging2020

    • Author(s)
      Shuuichi Ooi, Minoru Tachiki, Akihiro Kikuchi, Shunichi Arisawa, Taro Konomi, Hayato Ito, Eiji Kako, Hiroshi Sakai, Kensei Umemori
    • Organizer
      The 33rd International Symposium on Superconductivity
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 正六角形Bi2212中に閉じ込められた渦糸の周期律2019

    • Author(s)
      大井 修一, 立木 実, 茂筑 高士, 小森 和範, 平田 和人, 有沢 俊一
    • Organizer
      日本物理学会 2019年秋季大会
    • Related Report
      2019 Research-status Report
  • [Remarks] Profile - OOI, Shuuichi

    • URL

      https://samurai.nims.go.jp/profiles/ooi_shuuichi

    • Related Report
      2021 Annual Research Report
  • [Remarks] 物質・材料研究機構 研究者総覧

    • URL

      https://samurai.nims.go.jp/profiles/ooi_shuuichi?locale=ja

    • Related Report
      2019 Research-status Report

URL: 

Published: 2019-04-18   Modified: 2023-01-30  

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