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Tunneling phenomena of heavy-fermion superconductor under pressure

Research Project

Project/Area Number 21540371
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Condensed matter physics II
Research InstitutionUniversity of Hyogo

Principal Investigator

SUMIYAMA Akihiko  兵庫県立大学, 大学院・物質理学研究科, 教授 (30226609)

Co-Investigator(Kenkyū-buntansha) MOTOYAMA Gaku  兵庫県立大学, 大学院・物質理学研究科, 助教 (20360050)
Project Period (FY) 2009 – 2011
Project Status Completed (Fiscal Year 2011)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2011: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2010: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2009: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Keywords超伝導材料・素子 / 強相関電子系 / 低温物性 / 物性実験 / 重い電子系超伝導体 / トンネル現象 / 点接合分光 / ジョセフソン効果 / 圧力依存性
Research Abstract

We have succeeded in measuring the Josephson effect of UP_<t3> in the superconducting C phase for the first time by applying pressure and making the C phase appear in low magnetic fields, and found no qualitative difference between the B and C phases. The point-contact spectroscopy of UR_<u2> S_<i2> under pressure suggests that the "hidden order" phase and antiferromagnetic phase has a similar electronic state near the Fermienergy.

Report

(4 results)
  • 2011 Annual Research Report   Final Research Report ( PDF )
  • 2010 Annual Research Report
  • 2009 Annual Research Report
  • Research Products

    (20 results)

All 2012 2011 2010 2009 Other

All Journal Article (5 results) (of which Peer Reviewed: 5 results) Presentation (15 results)

  • [Journal Article] Development of Point-Contact Spectroscopy of Heavy-Fermion Superconductors under Pressure2012

    • Author(s)
      酒井佳央
    • Journal Title

      Journal of the Physical Society of Japan Supplements

      Volume: 81(掲載予定)

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Comparison of Josephson effect of heavy-fermion superconductor CeTIn5(T=Co, Ir)2010

    • Author(s)
      A. Sumiyama, Y. Tsuji, N. Ikeda, Y. Oda, H. Shishido, R. Settai, Y. Onuki
    • Journal Title

      Physica C

      Volume: Vol.470 Pages: S577-S578

    • DOI

      10.1016/j.physc.2009.12.020

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Journal Article] Comparison of Josephson effect of heavy-fermion superconductor CeTIn_5(T=Co, Ir)2010

    • Author(s)
      住山昭彦
    • Journal Title

      Physica C

      Volume: 470

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Josephson effect between noncentrosymmetric LaPt_3Si and a conventional superconductor2010

    • Author(s)
      青木義弘
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 79

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Development of Point-Contact Spectroscopy of Heavy-Fermion Superconductors under Pressure

    • Author(s)
      Y. Sakai, G. Motoyama, A. Yamaguchi, A. Sumiyama, A. Yamamura, and I. Sato
    • Journal Title

      J. Phys. Soc. Jpn. Suppl.

      Volume: (掲載予定)

    • Related Report
      2011 Final Research Report
    • Peer Reviewed
  • [Presentation] URu2Si2のHO相とAFM相における点接合スペクトルの比較2012

    • Author(s)
      酒井佳央
    • Organizer
      日本物理学会第67回年次大会
    • Place of Presentation
      関西学院大学
    • Year and Date
      2012-03-24
    • Related Report
      2011 Final Research Report
  • [Presentation] URu_2Si_2のHO相とAFM相における点接合スペクトルの比較2012

    • Author(s)
      酒井佳央
    • Organizer
      日本物理学会第67回年次大会
    • Place of Presentation
      大阪大学豊中キャンパス(大阪府)
    • Year and Date
      2012-03-24
    • Related Report
      2011 Annual Research Report
  • [Presentation] Development of Point-Contact Spectroscopy of Heavy-Fermion Superconductors under Pressure2011

    • Author(s)
      酒井佳央
    • Organizer
      International Workshop on Heavy Fermions TOKIMEKI 2011
    • Place of Presentation
      大阪大学
    • Year and Date
      2011-11-24
    • Related Report
      2011 Final Research Report
  • [Presentation] Development of Point-Contact Spectroscopy of Heavy-Fermion Superconductors under Pressure2011

    • Author(s)
      酒井佳央
    • Organizer
      International Workshop on Heavy Fermions, TOKIMEKI 2011
    • Place of Presentation
      大阪大学豊中キャンパス(大阪府)
    • Year and Date
      2011-11-24
    • Related Report
      2011 Annual Research Report
  • [Presentation] URu2Si2における圧力下点接合分光測定2011

    • Author(s)
      酒井佳央
    • Organizer
      日本物理学会2011年秋季大会
    • Place of Presentation
      富山大学
    • Year and Date
      2011-09-23
    • Related Report
      2011 Final Research Report
  • [Presentation] 重い電子系超伝導体UPt3の圧力下ジョセフソン効果2011

    • Author(s)
      郷地順
    • Organizer
      日本物理学会2011年秋季大会
    • Place of Presentation
      富山大学
    • Year and Date
      2011-09-23
    • Related Report
      2011 Final Research Report
  • [Presentation] 重い電子系超伝導体UPt_3の圧力下ジョセフソン効果2011

    • Author(s)
      郷地順
    • Organizer
      日本物理学会2011年秋季大会
    • Place of Presentation
      大阪大学豊中キャンパス(大阪府)
    • Year and Date
      2011-09-23
    • Related Report
      2011 Annual Research Report
  • [Presentation] URu_2Si_2における圧力下点接合分光測定2011

    • Author(s)
      酒井佳央
    • Organizer
      日本物理学会2011年秋季大会
    • Place of Presentation
      大阪大学豊中キャンパス(大阪府)
    • Year and Date
      2011-09-23
    • Related Report
      2011 Annual Research Report
  • [Presentation] 重い電子系超伝導体UPt3のジョセフソン効果2011

    • Author(s)
      住山昭彦
    • Organizer
      日本物理学会第66回年次大会
    • Place of Presentation
      新潟大学
    • Year and Date
      2011-03-27
    • Related Report
      2011 Final Research Report
  • [Presentation] URu2Si2における圧力下点接合分光測定2011

    • Author(s)
      酒井佳央
    • Organizer
      日本物理学会第66回年次大会
    • Place of Presentation
      新潟大学
    • Year and Date
      2011-03-27
    • Related Report
      2011 Final Research Report
  • [Presentation] 重い電子系超伝導体UPt_3のジョセブソン効果2011

    • Author(s)
      住山昭彦
    • Organizer
      日本物理学会 第66回年次大会
    • Place of Presentation
      新潟大学
    • Year and Date
      2011-03-27
    • Related Report
      2010 Annual Research Report
  • [Presentation] URu_2Si_2における圧力下点接合分光測定2011

    • Author(s)
      酒井佳央
    • Organizer
      日本物理学会 第66回年次大会
    • Place of Presentation
      新潟大学
    • Year and Date
      2011-03-27
    • Related Report
      2010 Annual Research Report
  • [Presentation] Anisotropy of magnetic susceptibility of URu_2Si_2 under pressure2010

    • Author(s)
      本山岳
    • Organizer
      International Conference on Strongly Correlated Electron Systems
    • Place of Presentation
      Santa Fe Convention Center
    • Year and Date
      2010-07-01
    • Related Report
      2010 Annual Research Report
  • [Presentation] URu_2Si_2の秩序相における電気抵抗率及び磁化率から求めた励起エネルギーの比較II2010

    • Author(s)
      境秀樹
    • Organizer
      日本物理学会 第65回年次大会
    • Place of Presentation
      岡山大学
    • Year and Date
      2010-03-21
    • Related Report
      2009 Annual Research Report
  • [Presentation] URu_2Si_2の秩序相における電気抵抗率及び磁化率から求めた励起エネルギーの比較2009

    • Author(s)
      境秀樹
    • Organizer
      日本物理学会 2009年秋季大会
    • Place of Presentation
      熊本大学
    • Year and Date
      2009-09-25
    • Related Report
      2009 Annual Research Report

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Published: 2009-04-01   Modified: 2020-05-15  

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