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Small-number vortex state in mesoscopic high-Tc superconductors

Research Project

Project/Area Number 16H04022
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Condensed matter physics II
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, 機能性材料研究拠点, 主任研究員 (10354292)

Research Collaborator Mochiku Takashi  
Tachiki Minoru  
Arisawa Shunichi  
Wang Hua-bing  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2017: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
Fiscal Year 2016: ¥8,580,000 (Direct Cost: ¥6,600,000、Indirect Cost: ¥1,980,000)
Keywords高温超伝導 / 渦糸 / メゾスコピック / 正多角形 / 超伝導材料・素子 / 低温物性 / 渦糸状態
Outline of Final Research Achievements

High-Tc superconductors exhibit unique vortex states, e.g., vortex solid to liquid phase transition and vortex glass transition, because of their large thermal fluctuation and highly-anisotropic layered structure. To investigate how the vortex states are modified by reducing the lateral size of crystals, we have performed c-axis transport measurements in a wide range of temperature and magnetic field using various shapes (equilateral triangle, square, pentagon, hexagon, etc.) and dimensions (from sub to 10 micron) of samples fabricated by a focused ion beam. As a result, we succeeded to explore the vortex state down to 5K and to reveal vortex states even in a sub-micron sample. Furthermore, in comparison with numerical simulations of the configuration of vortices in various shapes, we could understand the reason of the oscillating behavior of the melting transition temperature, which is specific in mesoscopic samples.

Academic Significance and Societal Importance of the Research Achievements

互いに相互作用する多粒子から成る系の自己組織化とそのエネルギー的な安定性は、解析的な解が得難いがゆえに、様々な物理系において観測がなされている他、数値計算による解明が進んでいる。超伝導渦糸系でも渦糸殻構造などに注目した同様の研究が行われた。今回、メゾスコピックサイズの高温超伝導体を用いることで、自己組織化した渦糸結晶状態の融解転移を観測でき、その転移温度からエネルギー的な安定性を調べることが可能であることを示した。また、サブミクロンサイズまでの微小化を進める上で得られた微細加工の技術的知見や微小試料中の渦糸物性の理解は、未来の高温超伝導単結晶デバイス応用につながることが期待される。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (21 results)

All 2018 2017 2016 Other

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 3 results,  Acknowledgement Compliant: 1 results) Presentation (15 results) (of which Int'l Joint Research: 8 results,  Invited: 1 results) Remarks (3 results)

  • [Journal Article] Vortex states in a submicron Bi2212 crystal probed by intrinsic Josephson junctions2018

    • Author(s)
      S. Ooi, M. Tachiki, T. Mochiku, H.B. Wang, K. Komori, K. Hirata, S. Arisawa
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 969 Pages: 0120341-5

    • DOI

      10.1088/1742-6596/969/1/012034

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Vortex states in micron-sized Bi2Sr2CaCu2O8+y crystals2017

    • Author(s)
      Ooi Shuuichi、Mochiku Takashi、Tachiki Minoru、Hirata Kazuto
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 871 Pages: 012019-012019

    • DOI

      10.1088/1742-6596/871/1/012019

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Vortex states in micron-sized Bi2Sr2CaCu2O8+y crystals2017

    • Author(s)
      Shuuichi Ooi, Takashi Mochiku, Minoru Tachiki, Kazuto Hirata
    • Journal Title

      Physics Procedia

      Volume: 印刷中

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Presentation] Geometrical matching of vortex clusters in micron-sized superconducting regular polygons2018

    • Author(s)
      S. Ooi, M. Tachiki, T. Mochiku, K. Hirata, K. Komori, S. Arisawa
    • Organizer
      The 31st International Symposium on Superconductivity.
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Hybrid of Single and Double-Component Superconductors2018

    • Author(s)
      Y. Tanaka, H. Yamamori, T. Yanagisawa, T. Nishio, S. Ooi, T. Minoru, S. Arisawa
    • Organizer
      The 31st International Symposium on Superconductivity.
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Nucleation of Fractional Vortices in a Superconducting Bilayer2018

    • Author(s)
      T. Nishio, S. Arisawa, S. Ooi, M. Tachiki, H. Yamamori, T. Yanagisawa, Y. Tanaka
    • Organizer
      The 31st International Symposium on Superconductivity.
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Anomalous Enhancement of Critical Current Density due to Novel Planar Defects in CaKFe4As42018

    • Author(s)
      T. Tamegai, A. Takahashi, S. Pyon, N. Ito, S. Ishida, A. Iyo, H. Eisaki, M. Imai, H. Abe, T. Terashima, S. Ooi, A. Ichinose
    • Organizer
      M2S-2018 conference
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 様々な形状の微小Bi2212における渦糸微結晶融解転移2018

    • 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 第73回年次大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 微小Bi2212 単結晶の渦糸相図2018

    • 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
      新規超伝導体・ナノ構造超伝導体における渦糸物理
    • Related Report
      2017 Annual Research Report
  • [Presentation] 微小Bi2212 単結晶中の渦糸状態2018

    • 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
      つくば-柏-本郷 超伝導かけはしプロジェクト ワークショップ
    • Related Report
      2017 Annual Research Report
  • [Presentation] サブミクロン固有ジョセフソン接合中の渦糸2017

    • Author(s)
      大井修一, 立木実, 茂筑高士, 王華兵, 平田和人, 有沢俊一
    • Organizer
      日本物理学会 第72回年次大会(2017年)
    • Place of Presentation
      大阪大学
    • Year and Date
      2017-03-17
    • Related Report
      2016 Annual Research Report
  • [Presentation] Control of a single vortex in a stack of intrinsic Josephson junctions2017

    • 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
      30th International Symposium on Superconductivity (ISS2017)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Vortex penetration into a sub-micron stack of intrinsic Josephson junctions of Bi2Sr2CaCu2O8+y2017

    • Author(s)
      大井修一、立木実、茂筑高士、王華兵 、平田和人、小森和範、有沢俊一
    • Organizer
      28th international conference on low temperature physics (LT28)
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 単一孔をもつ微小Bi2212単結晶中の渦糸2017

    • 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 2017年秋季大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Vortex states in micron-sized crystals2016

    • Author(s)
      *Shuuichi Ooi, Takashi Mochiku, Minoru Tachiki, Kazuto Hirata
    • Organizer
      International symposium on superconductivity
    • Place of Presentation
      東京国際フォーラム
    • Year and Date
      2016-12-13
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Vortex states confined in triangle-shaped Bi2Sr2CaCu2O8+y2016

    • Author(s)
      S. Ooi, T. Mochiku, M. Tachiki, K. Hirata
    • Organizer
      Plasma+ 2016
    • Place of Presentation
      南京大学
    • Year and Date
      2016-10-09
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 微小Bi2212単結晶における低温渦糸固体相2016

    • Author(s)
      大井修一, 立木実, 茂筑高士, 平田和人
    • Organizer
      日本物理学会 2016年秋季大会
    • Place of Presentation
      金沢大学
    • Year and Date
      2016-09-13
    • Related Report
      2016 Annual Research Report
  • [Presentation] 超伝導磁束量子研究のための数値シミュレーション2016

    • Author(s)
      立木実, 大井修一, 平田和人, 有沢俊一
    • Organizer
      COMSOL Conference Tokyo 2016
    • Place of Presentation
      秋葉原UDXギャラリー/ネクスト
    • Related Report
      2016 Annual Research Report
  • [Remarks] NIMS 研究者総覧

    • URL

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

    • Related Report
      2018 Annual Research Report
  • [Remarks] ナノ構造による高温超伝導体の機能化

    • URL

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

    • Related Report
      2017 Annual Research Report
  • [Remarks] ナノ構造による高温超伝導体の機能化

    • URL

      http://samurai.nims.go.jp/pdf/OOI_Shuuichi-j.pdf

    • Related Report
      2016 Annual Research Report

URL: 

Published: 2016-04-21   Modified: 2020-03-30  

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