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Research of Quantum tunneling phenomena in mesoscopic Josephson superlattice

Research Project

Project/Area Number 16360147
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Electronic materials/Electric materials
Research InstitutionUtsunomiya University

Principal Investigator

IRIE Akinobu  Utsunomiya Univ., Engineering, Associate professor, 工学部, 助教授 (90241843)

Co-Investigator(Kenkyū-buntansha) OYA Gin-ichiro  Utsunomiya Univ., Engineering, Professor, 工学部, 教授 (00006280)
KITAMURA Michihide  Utsunomiya Univ., Engineering, Associate professor, 工学部, 助教授 (90161497)
ISHII Kiyoshi  Utsunomiya Univ., Engineering, Professor, 工学部, 教授 (30134258)
Project Period (FY) 2004 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥15,100,000 (Direct Cost: ¥15,100,000)
Fiscal Year 2006: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 2005: ¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 2004: ¥11,300,000 (Direct Cost: ¥11,300,000)
Keywordshigh Te superconductor / intrinsic Josephson junctions / mesoscopic phenomena / vortex flow / SQUID / magnet / superconductor structure / spin injection / Bi_2Sr_2CaCu_2O_y / vortex flow / 超伝導ギャップ / 超伝導体接合 / サブミクロン / 帯電効果 / 熱活性モデル
Research Abstract

We studied quantum tunneling phenomena in intrinsic Josephson superlattice of (Bil-xPbx)_2Sr_2CaCu_2O_y single crystals. In this study, we obtained the following results.
1. We developed the new fabricated process to make a stack of small intrinsic Josephson junctions. By using this process, samples with lateral dimensions ranging from sub-μm^2 to several tens μm^2 were successfully fabricated.
2. The current-voltage characteristics of BPSCCO intrinsic Josephson junctions showed clear multiple branches with high hysteresis and a well-defined gap structure without negative resistance. The quasiparticle I-V characteristics were in agreement with the feature of a weighted, momentum-averaged d-wave model.
3. At intermediate temperature the switching mechanism from zero voltage state to a finite voltage state is due to thermal activation process. At lower temperature switching current distribution became wider due to the influence of multiple switching modes.
4. To analyze the vortex dynamics, the inductive coupling model taking into account thermal fluctuations was proposed. The model reproduced the previous experimental results and suggests that the out-of-phase flow of vortices is stable rather than the in-phase flow, and the oscillations of the vortex flow resistance are not directly related to the structure of the vortex lattice.
5. The dc SQUIDs with in-plane loop geometry and two stacks of intrinsic Josephson junctions were successfully fabricated using the developed process. The fabricated SQUID showed clear periodic and symmetric flux-voltage characteristics due to the quantum interference between the stacks.
6. The hybrid Fe/BSCCO structure was fabricated. After an application of a magnetic field, the suppression of the critical current of intrinsic Josephson junctions due to the spin injection was observed.

Report

(4 results)
  • 2006 Annual Research Report   Final Research Report Summary
  • 2005 Annual Research Report
  • 2004 Annual Research Report
  • Research Products

    (39 results)

All 2007 2006 2005 2004 Other

All Journal Article (39 results)

  • [Journal Article] Microwave response of intrinsic Josephson junctions in Bi_2Sr_2CaCu_2O_y single crystals at elevated temperatures2007

    • Author(s)
      G.Oya, T.Hashimoto, A.Irie
    • Journal Title

      Supercond. Sci. and Technol. 19

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Effect of thermal fluctuations on Josephson vortex dynamics in intrinsic Josephson junction2007

    • Author(s)
      A.Irie, G.Oya
    • Journal Title

      Supercond. Sci. and Technol. 20

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] Multijunction SQUID based on intrinsic Josephson junctions2007

    • Author(s)
      A.Irie, S.Okano, G.Oya
    • Journal Title

      IEEE Trans. Appl. Supercond. (印刷中)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Microwave response of intrinsic Josephson junctions in Bi_2Sr_2CaCu_20_y single crystals at elevated temperatures2007

    • Author(s)
      G.Oya, T.Hashimoto, A.Irie
    • Journal Title

      Supercond.Sci. and Technol. 19

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Effect of thermal fluctuations on Josephson vortex dynamics in intrinsic Josephson junction2007

    • Author(s)
      A.Irie, G.Oya
    • Journal Title

      Supercond.Sci. and Technol. 20

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Multijunction SQUID based on intrinsic Josephson junctions2007

    • Author(s)
      A.Irie, S.Okano, G.Oya
    • Journal Title

      IEEE Trans.Appl.Supercond. (in print)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Multijunction SQUID based on intrinsic Josephson junctions2007

    • Author(s)
      A.Irie, S.Okano, G.Oya
    • Journal Title

      IEEE Trans.Appl. Supercond. (印刷中)

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Observation of multiple vortex-flow branches in intrinsic Bi_2Sr_2CaCu_2O_y Josephson junctions2006

    • Author(s)
      H.Kaneoya, A.Irie, G.Oya
    • Journal Title

      J. Korean Phys. Soc. 48

      Pages: 1066-1069

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] Dc SQUIDs Made of Intrinsic Josephson Junctions2006

    • Author(s)
      S.Okano, A.Irie, G.Oya
    • Journal Title

      J. Korean Phys. Soc. 48

      Pages: 1080-1083

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] Observation of multiple vortex-flow branches in intrinsic Bi_2Sr_2CaCu_20_y Josephson junctions2006

    • Author(s)
      H.Kaneoya, A.Irie, G.Oya
    • Journal Title

      J.Korean phys.Soc 48

      Pages: 1066-1069

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Dc SQUIDs Made of Intrinsic Josephson Junctions2006

    • Author(s)
      S.Okano, A.Irie, G.Oya
    • Journal Title

      J.Korean Phys.Soc 48

      Pages: 1080-1083

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Dc SQUIDs Made of Intrinsic Josephson Junctions2006

    • Author(s)
      S.Okano, A.Irie, G.Oya
    • Journal Title

      J.Korean Phys.Soc. (印刷中)

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Observation of multiple vortex-flow branches in intrinsic Bi_2Sr_2CaCu_2O_y Josephson junctions2006

    • Author(s)
      H.Kaneoya, A.Irie, G.Oya
    • Journal Title

      J.Korean Phys.Soc. (印刷中)

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Fabrication of dc SQUIDs based on Bi_2Sr_2CaCu_2O_y intrinsic Josephson Junctions2005

    • Author(s)
      A.Irie, G.Oya
    • Journal Title

      IEEE Trans. Appl. Supercond. 15

      Pages: 813-816

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Magnetic field dependence of vortex flow in stacked intrinsic Josephson Junctions in Bi_2Sr_2CaCu_2O_y single-crystal mesas2005

    • Author(s)
      G.Oya, T.Hayashi, H.Kaneoya, K.Kanda, A.Irie, N.J.Ali
    • Journal Title

      IEEE Trans. Appl. Supercond. 15

      Pages: 201-204

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Shapiro step response of the surface intrinsic Josephson junctions in Bi_2Sr_2CaCu_2O_y single crystals at elevated temperatures2005

    • Author(s)
      G.Oya, A.Terada, N.Takahashi, A.Irie, T.Hashimoto
    • Journal Title

      Jpn. J. Appl. Phys. 44

    • NAID

      10015726059

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Phenomenological approach to the superconducting gap of Bi_2Sr_2CaCu_2O_y2005

    • Author(s)
      M.Kitamura, A.Irie, G.Oya
    • Journal Title

      Physica C 423

      Pages: 190-198

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary 2005 Annual Research Report
  • [Journal Article] Fabrication of dc SQUIDs based on Bi_2Sr_2CaCu_20_y intrinsic Josephson Junctions2005

    • Author(s)
      A.Irie, G.Oya
    • Journal Title

      IEEE Trans.Appl.Supercond. 15

      Pages: 813-816

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Magnetic field dependence of vortex flow in stacked intrinsic Josephson Junctions in Bi_2Sr_2CaCu_2O_y single-crystal mesas2005

    • Author(s)
      G.Oya, T.Hayashi, H.Kaneoya, K.Kanda, A.Irie, N.J.Ali
    • Journal Title

      IEEE Trans.Appl.Supercond. 15

      Pages: 201-204

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary 2005 Annual Research Report
  • [Journal Article] Shapiro step response of the surface intrinsic Josephson junctions in Bi_2Sr_2CaCu_20_Y single crystals at elevated temperatures2005

    • Author(s)
      G.Oya, A.Terada, N.Takahashi, A.Irie, T.Hashimoto
    • Journal Title

      Jpn.J.Appl.Phys. 44

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Phenomenological approach to the superconducting gap of Bi_2Sr_2CaCu_20_y2005

    • Author(s)
      M.Kitamura, A.Irie, G.Oya
    • Journal Title

      Physica C 423

      Pages: 190-198

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Fabrication of dc SQUIDs based on Bi_2Sr_2CaCu_2O_y intrinsic Josephson Junctions2005

    • Author(s)
      A.Irie, G.Oya
    • Journal Title

      IEEE Trans.Appl Supercond. 15

      Pages: 813-816

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Shapiro step response of the surface intrinsic Josephson junctions in Bi_2Sr_2CaCu_2O_y single crystals at elevated temperatures2005

    • Author(s)
      G.Oya, A.Terada, N.Takahashi, A.Irie, T.Hashimoto
    • Journal Title

      Jpn.J.Appl.Phys. 44

    • NAID

      10015726059

    • Related Report
      2005 Annual Research Report
  • [Journal Article] In-phase motion of vortices in intrinsic Josephson junctions in mesas of Bi_2Sr_2CaCu_2O_y single crystals2004

    • Author(s)
      N.J.Ali, Y.Imai, H.Kaneoya, A.Irie, G.Oya
    • Journal Title

      Trans. MRS-J 29

      Pages: 1335-1338

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Interaction between optical phonons and ac Josephson oscillations in intrinsic Josephson junctions of (Bi_<1-x>Pb_x)_2Sr_2CaCu_2O_y2004

    • Author(s)
      H.Kaneoya, A.Irie, G.Oya
    • Journal Title

      Trans. MRS-J 29

      Pages: 1345-1348

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Temperature dependence of Shapiro steps in surface intrinsic Josephson junctions of Bi_2Sr_2CaCu_2O_y single crystals2004

    • Author(s)
      A.Irie, G.Oya
    • Journal Title

      Trans. MRS-J 29

      Pages: 1349-1352

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Temperature dependece of crytical currents of small-sized intrinsic Josephson iunctions in Bi_2Sr_2CaCu_2O_y2004

    • Author(s)
      M.Kitamura, A.Irie, G.Oya
    • Journal Title

      Trans. MRS-J 29

      Pages: 1353-1356

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Measurements of low-frequency noise spectral densities for a small-sized stack of intrinsic Josephson junctions of Bi_2Sr_2CaCu_2O_y single crystals2004

    • Author(s)
      A.Saito, H.Ishida, K.Hamasaki, A.Irie, G.Oya
    • Journal Title

      Appl. Phys. Lett. 85

      Pages: 1196-1198

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] In-phase motion of vortices in intrinsic Josephson junctions in mesas of Bi_2CaCu_2O_y single crystals2004

    • Author(s)
      N.J.Ali, Y.Imai, H.Kaneoya, A.Irie, G.Oya
    • Journal Title

      Trans.MRS-J 29

      Pages: 1335-1338

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Interaction between optical phonons and ac Josephson oscillations in intrinsic Josephson junctions of (Bi_<1-x_Pb_x)_2Sr_2CaCu_20_y2004

    • Author(s)
      H.Kaneoya, A.Irie, G.Oya
    • Journal Title

      Trans.MRS-J 29

      Pages: 1345-1348

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Temperature dependence of Shapiro steps in surface intrinsic Josephson junctions of Bi_2Sr_2CaCu_20_Y single crystals2004

    • Author(s)
      A.Irie, G.Oya
    • Journal Title

      Trans.MRS-J 29

      Pages: 1349-1352

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Temperature dependece of crytical currents of small-sized intrinsic Josephson junctions in Bi_2Sr_2CaCu_20_Y2004

    • Author(s)
      M.Kitamura, A.Irie, G.Oya
    • Journal Title

      Trans.MRS-J 29

      Pages: 1353-1356

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Measurements of low-frequency noise spectral densities for a small-sized stack of intrinsic Josephson junctions of Bi_2Sr_2CaCu_20_y single crystals2004

    • Author(s)
      A.Saito, H.Ishida, K.Hamasaki, A.Irie, G.Oya
    • Journal Title

      Appl.Phys.Lett.. 85

      Pages: 1196-1198

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Temperature Dependence of Shapiro Steps in Surface Intrinsic Josephson Junctions of Bi_2Sr_2CaCu_2O_y Single Crystals2004

    • Author(s)
      A.Irie, G.Oya
    • Journal Title

      Transactions of Materials Research Society of Japan 29

      Pages: 1349-1352

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Interaction between optical phonons and ac Josephson oscillations in intrinsic Josephson junctions of (Bi_<1-x>Pb_x)_2Sr_2CaCu_2O_y2004

    • Author(s)
      H.Kaneoya, A.Irie, G.Oya
    • Journal Title

      Transactions of Materials Research Society of Japan 29

      Pages: 1345-1346

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Temperature dependence of critical currents of small-sized intrinsic Josephson junctions in Bi_2Sr_2CaCu_2O_y2004

    • Author(s)
      M.Kitamura, A.Irie, G.Oya
    • Journal Title

      Transactions of Materials Research Society of Japan 29

      Pages: 1353-1356

    • Related Report
      2004 Annual Research Report
  • [Journal Article] In-Phase Motion of Vortices in Intrinsic Josephson Junctions in Mesas of Bi_2Sr_2CaCu_2O_y Single Crystals2004

    • Author(s)
      N.J.Ali, Y.Imai, H.Kaneoya, A.Irie, G.Oya
    • Journal Title

      Transactions of Materials Research Society of Japan 29

      Pages: 1335-1338

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Fabrication of Dc SQUIDs Based on Bi_2Sr_2CaCu_2O_y Intrinsic Josephson Junctions

    • Author(s)
      A.Irie, G.Oya
    • Journal Title

      IEEE Trans.Appl.Supercond. (印刷中)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Magnetic Field Dependence of Vortex Flow in Stacked Intrinsic Josephson Junctions in Bi_2Sr_2CaCu_2O_y Single-Crystal Mesas

    • Author(s)
      G.Oya, T.Hayashi, H.Kaneoya, K.Kanda, A.Irie, N.J.Ali
    • Journal Title

      IEEE Trans.Appl.Supercond. (印刷中)

    • Related Report
      2004 Annual Research Report

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Published: 2004-04-01   Modified: 2016-04-21  

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