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Study of nonlocal correlation of Cooper-pair tunnelings in systems of small Josephson junctions

Research Project

Project/Area Number 24340067
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypePartial Multi-year Fund
Section一般
Research Field Condensed matter physics I
Research InstitutionThe University of Electro-Communications

Principal Investigator

SHIMADA Hiroshi  電気通信大学, 情報理工学(系)研究科, 准教授 (60216067)

Co-Investigator(Renkei-kenkyūsha) MIZUGAKI Yoshinao  電気通信大学, 情報理工学研究科, 教授 (30280887)
Project Period (FY) 2012-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000)
Fiscal Year 2014: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2013: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2012: ¥8,840,000 (Direct Cost: ¥6,800,000、Indirect Cost: ¥2,040,000)
Keywords微小ジョセフソン接合 / 電流ドラッグ / 電流ミラー / 非局所相関 / ブロッホ振動 / JQPサイクル / 接合列 / 帯電効果 / 電流誘引 / 電流プラトー / 交流ジョセフソン効果 / Bloch振動
Outline of Final Research Achievements

We have experimentally shown that application of high-frequency radiation in a range 100 kHz-170 GHz to an array of small Josephson junctions weaken its Coulomb blockade of Cooper-pair tunneling and induce conductance in the array. There exists a correlation between currents in two arrays of small Josephson junctions separated by a distance of the order of 10 um. We have demonstrated that this can be understood quantitatively if we assume that a current in one array induces an ac voltage in the other array the magnitude of which is proportional to the square root of the current in the first. We have also investigated I-V characteristics of an array of small junctions connected to SQUID arrays which serve as its environmental impedance. We showed a clear Bloch oscillation when the environmental impedance was large as well as current plateaus superposed. The latter has turned out due to a kind of nonlocal interaction of the tunnelings in the SQUID arrays and those in the junction array.

Report

(4 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Annual Research Report
  • 2012 Annual Research Report
  • Research Products

    (20 results)

All 2015 2014 2013 2012

All Journal Article (4 results) (of which Peer Reviewed: 2 results,  Acknowledgement Compliant: 2 results) Presentation (16 results) (of which Invited: 1 results)

  • [Journal Article] 量子電流ミラー効果に基づく高精度な電流整数倍器の実現に向けた研究2015

    • Author(s)
      武田晃一, 宮脇健至, ガンドロシュラ・スリニワス, 石田千尋, 萩原彩乃, 水柿義直, 島田宏
    • Journal Title

      IEICE Technical Report

      Volume: SCE2014-49 Pages: 1-6

    • Related Report
      2014 Annual Research Report
    • Acknowledgement Compliant
  • [Journal Article] Characterization of Superconducting Single-Electron Transistors with Small Al/AlOx/V Josephson Junctions2014

    • Author(s)
      H. Shimada, K. Miyawaki, A. Hagiwara, K. Takeda, and Y. Mizugaki
    • Journal Title

      Superconductor Science and Technology

      Volume: 27 Issue: 11 Pages: 115015-115015

    • DOI

      10.1088/0953-2048/27/11/115015

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Precision improvement of the current multiplier based on the quantum current-mirror effect2014

    • Author(s)
      K. Takeda, C. Ishida, S. Gandrothula, Y. Mizugaki, and H. Shimada
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 53 Issue: 2 Pages: 023101-023101

    • DOI

      10.7567/jjap.53.023101

    • NAID

      210000143324

    • Related Report
      2013 Annual Research Report
  • [Journal Article] Drag Current Reversal in Capacitively Coupled Arrays of Small Josephson Junctions2012

    • Author(s)
      Hiroshi Shimada, Chihiro Ishida, and Yoshinao Mizugaki
    • Journal Title

      Physical Review Letters

      Volume: 109 Issue: 19

    • DOI

      10.1103/physrevlett.109.196801

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Presentation] 微小Josephson接合列におけるBloch振動と電流プラトーの観測2015

    • Author(s)
      島田宏、鹿取俊介、出口智明、水柿義直
    • Organizer
      日本物理学会
    • Place of Presentation
      早稲田大学、東京
    • Year and Date
      2015-03-21 – 2015-03-24
    • Related Report
      2014 Annual Research Report
  • [Presentation] 二重微小Josephson接合における接合間のトンネル過程の相互作用2015

    • Author(s)
      松原明志、水柿義直、島田宏
    • Organizer
      日本物理学会
    • Place of Presentation
      早稲田大学、東京
    • Year and Date
      2015-03-21 – 2015-03-24
    • Related Report
      2014 Annual Research Report
  • [Presentation] 量子電流ミラー効果に基づく高精度な電流整数倍器の実現に向けた研究2015

    • Author(s)
      武田晃一、宮脇健至、ガンドロシュラ・スリニワス、石田千尋、萩原彩乃、水柿義直、島田宏
    • Organizer
      電子情報通信学会超伝導エレクトロニクス研究会
    • Place of Presentation
      機械振興会館、東京
    • Year and Date
      2015-01-22
    • Related Report
      2014 Annual Research Report
  • [Presentation] 微小なAl/AlOx/V接合を用いた超伝導単一電子トランジスタ2014

    • Author(s)
      宮脇健至、水柿義直、島田宏
    • Organizer
      応用物理学会
    • Place of Presentation
      北海道大学、札幌
    • Year and Date
      2014-09-17 – 2014-09-20
    • Related Report
      2014 Annual Research Report
  • [Presentation] 量子電流ミラー効果における電流誘引過程の非局所性2014

    • Author(s)
      武田晃一、水柿義直、島田宏
    • Organizer
      日本物理学会
    • Place of Presentation
      中部大学、春日井
    • Year and Date
      2014-09-07 – 2014-09-10
    • Related Report
      2014 Annual Research Report
  • [Presentation] 微小Josephson接合列を用いた電流整数倍器の高精度化2013

    • Author(s)
      武田晃一、Srinivas Gandrothula、水柿義直、島田宏
    • Organizer
      神奈川工科大学
    • Place of Presentation
      神奈川工科大学
    • Year and Date
      2013-03-28
    • Related Report
      2012 Annual Research Report
  • [Presentation] Al/AlO_x/V Josephson接合を用いた単一Cooper対素子2013

    • Author(s)
      宮脇健至、萩原彩乃、小谷祥生、水柿義直、島田宏
    • Organizer
      電子情報通信学会
    • Place of Presentation
      岐阜大学
    • Year and Date
      2013-03-22
    • Related Report
      2012 Annual Research Report
  • [Presentation] Current -Induction Phenomena in Capacitively Coupled Linear Arrays of Small Josephson Junctions2013

    • Author(s)
      H. Shimada
    • Organizer
      Low Dimensional Science 2013 Conference
    • Place of Presentation
      Huisun Forest, Nantou Taiwan
    • Related Report
      2013 Annual Research Report
    • Invited
  • [Presentation] Current Induction Phenomena in Capacitively Coupled Linear Arrays of Mesoscopic Josephson Junctions2013

    • Author(s)
      H. Shimada
    • Organizer
      The first international workshop MIPT-UEC
    • Place of Presentation
      Lebedev Institute, Moscow
    • Related Report
      2013 Annual Research Report
  • [Presentation] Towards precise current multiplication by use of linear arrays of small Josephson junctions2013

    • Author(s)
      K. Takeda
    • Organizer
      The first international workshop MIPT-UEC
    • Place of Presentation
      Lebedev Institute, Moscow
    • Related Report
      2013 Annual Research Report
  • [Presentation] Towards precise current multiplication by use of linear arrays of small Josephson junctions2013

    • Author(s)
      K. Takeda, S. Gandrothula, Y. Mizugaki, and H. Shimada
    • Organizer
      International Symposium on Nanoscale Transport and Technology
    • Place of Presentation
      Atsugi, Kanagawa
    • Related Report
      2013 Annual Research Report
  • [Presentation] Observation of Bloch oscillation and current plateaus in an array of small Josephson junctions embedded in dc-SQUIDs network2013

    • Author(s)
      S. Gandrothula, S. Katori, T. Deguchi, Y. Mizugaki, and H. Shimada
    • Organizer
      International Symposium on Nanoscale Transport and Technology
    • Place of Presentation
      Atsugi, Kanagawa
    • Related Report
      2013 Annual Research Report
  • [Presentation] Observation of Bloch oscillation and current plateaus in an array of small Josephson junctions embedded in dc-SQUIDs network2013

    • Author(s)
      S. Gandrothula, S. Katori, T. Deguchi, Y. Mizugaki, and H. Shimada
    • Organizer
      3rd International Conference on Nanotek and Expo
    • Place of Presentation
      Las Vegas, USA
    • Related Report
      2013 Annual Research Report
  • [Presentation] 微小Josephson 接合列における Bloch 振動と電流プラトー2013

    • Author(s)
      出口智明, 鹿取俊介, Srinivas Gandrothula, 水柿義直, 島田宏
    • Organizer
      第74回応用物理学会秋季学術講演会
    • Place of Presentation
      同志社大学京田辺キャンパス, 京都
    • Related Report
      2013 Annual Research Report
  • [Presentation] 微小ジョセフソン接合列間の量子電流ミラー効果に見られる二面性2013

    • Author(s)
      島田宏, 武田晃一, 水柿義直
    • Organizer
      電子情報通信学会 2013ソサエティ大会
    • Place of Presentation
      福岡工業大学, 福岡
    • Related Report
      2013 Annual Research Report
  • [Presentation] 量子電流ミラー効果に基づく微小電流の整数倍器2013

    • Author(s)
      武田晃一, 水柿義直, 島田宏
    • Organizer
      電子情報通信学会 2013ソサエティ大会
    • Place of Presentation
      福岡工業大学, 福岡
    • Related Report
      2013 Annual Research Report

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Published: 2012-04-24   Modified: 2020-05-15  

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