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Novel quantum phenomena in heavy fermion compounds studied by thermal expansion measurements

Research Project

Project/Area Number 18540349
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Condensed matter physics II
Research InstitutionOsaka University

Principal Investigator

TAKEUCHI Tetsuya  Osaka University, 低温センター, 助教 (90260629)

Project Period (FY) 2006 – 2008
Project Status Completed (Fiscal Year 2008)
Budget Amount *help
¥3,800,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥600,000)
Fiscal Year 2008: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2007: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2006: ¥1,200,000 (Direct Cost: ¥1,200,000)
Keywords結晶反転対称性 / 超伝導 / 比熱 / 熱膨張 / CePt_3Si / RRhIn_5 / Rcu_2Si_2 / RCu_2Si_2(R:希土類) / LaPt_3Si / CeIrSi_3 / LaIrSi_3 / 圧力誘起超伝導 / RRhIn_5(R:希土類元素)
Research Abstract

本申請研究によるCePt_3Siの超伝導の研究から, 超伝導状態における比熱の残留電子比熱係数γsが約34 mJ/K^2 molと多結晶試料(γs~200 mJ/K^2 mol)に比べ非常に小さくなっており, 試料の純良度の大幅な向上に成功した. 育成に成功した単結晶における比熱の反強磁性転移と超伝導転移によるピークは, これまでの結果と比較し非常にシャープであった.
平成20年度は超伝導状態における残留電子比熱係数sが真に有限なのか, あるいは試料の純良性をさらに向上させればゼロに近づくのか否かを, 微小単結晶試料(~10 mg)を用いた比熱測定により研究した. 電気抵抗測定による残留抵抗比から純良度を判断した. その結果, 試料の純良度をさらに向上させた場合, 超伝導転移や反強磁性転移による比熱のピークは若干鋭くなるものの, 残留電子比熱係数に関しては大きな変化は観測されなかった. このことはCePt_3Siの超伝導状態では本質的に残留状態密度が存在することが明らかとなった.

Report

(4 results)
  • 2008 Annual Research Report   Final Research Report ( PDF )
  • 2007 Annual Research Report
  • 2006 Annual Research Report
  • Research Products

    (40 results)

All 2009 2008 2007 2006

All Journal Article (26 results) (of which Peer Reviewed: 21 results) Presentation (14 results)

  • [Journal Article] Magnetic Properties of Single Crystalline RCu2Si2(R : Rare Earth)2009

    • Author(s)
      N. D. Dung, Y. Ota, K. Sugiyama, T. D. Matsuda, Y. Haga, K. Kindo, M. Hagiwara, T. Takeuchi, R. Settai, and Y. Onuki
    • Journal Title

      J. Phys. Soc. Jpn 78

      Pages: 24712-24712

    • NAID

      210000107679

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Multiband superconductivity in heavy fermion compound CePt_3Si without inversion symmetry: An NMR study on a highquality single crystal2009

    • Author(s)
      H. Mukuda, S. Nishide, A. Harada, K. Iwasaki, M. Yogi, M. Yashima, Y. Kitaoka, M. Tsujino, T. Takeuchi, R. Settai, Y. Onuki, E. Bauer, K. M. Itoh, E. E. Haller
    • Journal Title

      J. Phys. Soc. Jpn 78

      Pages: 14705-14705

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Multiband superconductivity in heavy fermion compound CePt_3Si with out inversion symmetry : An NMR study on a high-quality single crystal2009

    • Author(s)
      H. Mukuda, T. Takeuchi, 他
    • Journal Title

      J. Phys. Soc. Jpn. 78

      Pages: 14705-14705

    • NAID

      110007042086

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Superconducting properties of CePt_3Si and CeIrSi_3 without inversion symmetry in the crystal structure2008

    • Author(s)
      Y. Onuki, Y. Miyauchi, M. Tsujino, Y. Ida, R. Settai, T. Takeuchi, N. Tateiwa, T. D. Matsuda, Y. Haga, H. Harima
    • Journal Title

      J. Phys. Soc. Jpn. 77(Issue SUPPL. A)

      Pages: 37-42

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] LnRhIn_5(Ln : ランタノイド元素)おける磁性と結晶場効果2008

    • Author(s)
      竹内徹也, Nguyen Van Hieu, 摂待力生, 杉山清寛, 松田達磨, 芳賀芳範, 大貫惇睦
    • Journal Title

      固体物理 43

      Pages: 431-441

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Calorimetric study in single crystalline RCu_2Si_2(R : rare earth)2008

    • Author(s)
      Y. Takeda, N.D. Dung, Y. Nakano, T. Ishikura, S. Ikeda, T.D. Matsuda, E. Yamamoto, Y. Haga, T. Takeuchi, R. Settai, Y. Onuki
    • Journal Title

      J. Phys. Soc. Jpn 77

      Pages: 104710-104710

    • NAID

      110006969306

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Specific-heat study on the noncentrosymmetric heavy-fermion superconductor CePt_3Si2008

    • Author(s)
      T. Takeuchi, 他
    • Journal Title

      Journal of the Korean Physical Society 53

      Pages: 1041-1045

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] LnRhln_5(Ln : ランタノイド元素)の磁性と結晶場効果2008

    • Author(s)
      竹内徹也, 他
    • Journal Title

      固体物理 43

      Pages: 331-342

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Electrical and magnetic properties of R_3Al_<11> (R =La, Ce, Pr, and Nd)2008

    • Author(s)
      C. S. Garde, T. Takeuchi, 他
    • Journal Title

      J. Phys. Soc. Jpn. 77

      Pages: 124704-124704

    • NAID

      110007021679

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Synthesis and characterization of core-shell FePt@Ti-containing silica spherical nanocomposite as a catalyst earner for liquid-phase reactions2008

    • Author(s)
      K. Mori, T. Takeuchi, 他
    • Journal Title

      Journal of Physical Chemistry C 122

      Pages: 16478-16483

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Calorimetric study in single crystalline RCu_2Si_2 (R : rare earth)2008

    • Author(s)
      Y. Takeda, T. Takeuchi, 他
    • Journal Title

      J. Phys. Soc. Jpn. 77

      Pages: 104710-104710

    • NAID

      110006969306

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Superconducting properties of CePt_3Si and CeIrSi_3 without inversion symmetry inthe crystal structure2008

    • Author(s)
      Y. Onuki, T. Takeuchi, 他
    • Journal Title

      J. Phys. Soc. Jpn. Supp. A 77

      Pages: 37-42

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Huge upper critical field and electronic instability in pressure-induced superconductor CeIrSi_3 without inversion symmetry in the crystal structure2008

    • Author(s)
      R. Settai, T. Takeuchi, 他
    • Journal Title

      J. Phys. Soc. Jpn. 77

      Pages: 73705-73705

    • NAID

      110006821286

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Magnetic and superconducting properties of CeTX_3 (T : Transition metal and X : Siand Ge)with non-centrosymmetric crystal structure2008

    • Author(s)
      T. Kawai, T. Takeuchi, 他
    • Journal Title

      J. Phys. Soc. Jpn. 77

      Pages: 64716-64716

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Pressure-induced superconductivity in antiferromagnet CePd_5Al_22008

    • Author(s)
      F. Honda, T. Takeuchi, 他
    • Journal Title

      J. Phys. Soc. Jpn. 77

      Pages: 43701-43701

    • NAID

      110006649401

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Magnetic Properties and Crystalline Electric Field Scheme in RRhIn5(R : Rare Earth)2007

    • Author(s)
      N.V. Hieu, T. Takeuchi, H. Shishido, C. Tonohiro, T. Yamada, H. Nakashima, K. Sugiyama, R. Settai, T.D. Matsuda, Y. Haga, M. Hagiwara, K. Kindo, S. Araki, Y. Nozue and Y. Onuki
    • Journal Title

      J. Phys. Soc. Jpn 76

      Pages: 64702-64702

    • NAID

      210000106737

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] 空間反転対称性が破れた重い電子系CePt_3Siの超伝導2007

    • Author(s)
      竹内徹也, 摂待力生, 大貫惇睦, 播磨尚朝
    • Journal Title

      固体物理 Vol.42

      Pages: 431-441

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] 空間反転対称性が破れた重い電子系CePt_3Siの超伝導2007

    • Author(s)
      竹内徹也
    • Journal Title

      固体物理 42

      Pages: 431-441

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Specific Heat and de Haas-van Alphen Experiments on the Heavy-Fermion Superconductor CePt_3Si2007

    • Author(s)
      竹内徹也
    • Journal Title

      Journal of Physical Society of Japan 76

      Pages: 14702-14702

    • NAID

      110006151552

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] High-Quality Single Crystal Growth and Unique Electronic States in Cerium and Uranium Compounds2007

    • Author(s)
      大貫惇睦
    • Journal Title

      J. Phys.: Condens. Matter 19

      Pages: 125203-125203

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Recent Advances in Ce-Based Heavy-Fermion Superconductivity and Fermi Surface Properties2007

    • Author(s)
      摂待力生
    • Journal Title

      Journal of Physical Society of Japan 76

      Pages: 51003-51003

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Specific Heat and de Haas-van Alphen Experiments on the Heavy-Fermion Superconductor CePt_3Si2007

    • Author(s)
      T.Takeuchi, T.Yasuda, M.Tsujino, H.Shishido, R.Settai, H.Harima, Y.Onuki
    • Journal Title

      Journal of Physical Society of Japan 76

      Pages: 14702-14702

    • NAID

      110006151552

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Magnetic and Electrical Properties in CePtSi_3 without Inversion Symmetry in the Crystal Structure2007

    • Author(s)
      T.Kawai, Y.Okuda, H.Shishido, A.Thamizhavel, T.D.Matsuda, Y.Haga, M.Nakashima, T.Takeuchi, M.Hedo, Y.Uwatoko, R.Settai, Y.Onuki
    • Journal Title

      Journal of Physical Society of Japan 76

      Pages: 14710-14710

    • NAID

      110006151560

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Crystal growth and magnetic property of a new compound CeAu_4Si_22006

    • Author(s)
      H.Nakashima, A.Thamizhavel, T.D.Matsuda, Y.Haga, T.Takeuchi, K.Sugiyama, R.Settai, Y.Onuki
    • Journal Title

      J. OF ALLOYS AND COMPOUNDS 424

      Pages: 7-12

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Unique magnetic properties of NdRhIn_5, TbRhIn_5, DyRhIn_5, and HoRhIn_52006

    • Author(s)
      N.Van Hieu, H.Shishido, T.Takeuchi, A.Thamizhavel, H.Nakashima, K.Sugiyama, R.Settai, T.D.Matsuda, Y.Haga, M.Hagiwara, K.Kindo, Y.Onuki
    • Journal Title

      Journal of Physical Society of Japan 75

      Pages: 74708-74708

    • NAID

      10018799469

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Pressure-induced heavy-fermion superconductivity in antiferromagnet CeIrSi_3 without inversion symmetry2006

    • Author(s)
      I.Sugitani, Y.Okuda, H.Shishido, T.Yamada, A.Thamhavel, E.Yamamoto, T.D.Matsuda, Y.Haga, T.Takeuchi, R.Settai, Y.Onuki
    • Journal Title

      Journal of Physical Society of Japan 75

      Pages: 43703-43703

    • NAID

      110004729246

    • Related Report
      2006 Annual Research Report
  • [Presentation] The effect of crystalline electric field on magnetic properties in RCu_2Si_2(R : rare earth)2009

    • Author(s)
      N.D. Dung
    • Organizer
      日本物理学会
    • Place of Presentation
      岩手大学
    • Year and Date
      2009-09-21
    • Related Report
      2008 Final Research Report
  • [Presentation] 結晶の空間反転対称性が破れたCaPtSi_3の単結晶育成と超伝導2009

    • Author(s)
      竹内徹也
    • Organizer
      日本物理学会
    • Place of Presentation
      立教大学
    • Year and Date
      2009-03-30
    • Related Report
      2008 Final Research Report
  • [Presentation] YbCu_2Si_2とYbCu_2Ge_2の電子状態2008

    • Author(s)
      石倉達朗, 竹内徹也, 他
    • Organizer
      日本物理学会
    • Place of Presentation
      岩手大学
    • Year and Date
      2008-09-21
    • Related Report
      2008 Annual Research Report
  • [Presentation] 空間反転対称性をRPt_3SiとRIrSi_3における超伝導の研究2008

    • Author(s)
      竹内徹也
    • Organizer
      日本物理学会
    • Place of Presentation
      近畿大学
    • Year and Date
      2008-03-24
    • Related Report
      2008 Final Research Report
  • [Presentation] Effect of magnetic field and pressure on the heavy-fermion superconductor CePt_3Si2007

    • Author(s)
      竹内徹也
    • Organizer
      Magnetic and Superconducting Materials Conference 2007
    • Place of Presentation
      Khorezm Mamun Academy (Uzbekistan)
    • Year and Date
      2007-09-28
    • Related Report
      2007 Annual Research Report
  • [Presentation] CePt_3Siの圧力下における超伝導2007

    • Author(s)
      辻野真彦
    • Organizer
      日本物理学会
    • Place of Presentation
      北海道大学
    • Year and Date
      2007-09-22
    • Related Report
      2008 Final Research Report
  • [Presentation] Specific heat study on the heavy-fermion superconductor CePt_3Si2007

    • Author(s)
      竹内徹也
    • Organizer
      The 10th Asia Pacific Physics Conference
    • Place of Presentation
      韓国(ポーハン工科大学)
    • Year and Date
      2007-08-21
    • Related Report
      2007 Annual Research Report
  • [Presentation] Magnetism and Crystalline Electric Field in RRhIn_5 (R: rare earth)2007

    • Author(s)
      竹内徹也
    • Organizer
      Strongly Correlated Electron Systems 2007
    • Place of Presentation
      ヒューストン(米国)
    • Year and Date
      2007-05-18
    • Related Report
      2007 Annual Research Report
  • [Presentation] CePt_3Siの純良単結晶育成と超伝導2007

    • Author(s)
      辻野真彦
    • Organizer
      日本物理学会
    • Place of Presentation
      鹿児島大学
    • Year and Date
      2007-03-18
    • Related Report
      2008 Final Research Report
  • [Presentation] CePt_3Siの電子状態と超伝導2006

    • Author(s)
      竹内徹也
    • Organizer
      日本物理学会
    • Place of Presentation
      千葉大学
    • Year and Date
      2006-09-24
    • Related Report
      2008 Final Research Report
  • [Presentation] CePt_3Siにおける磁性と超伝導の比熱による研究II2006

    • Author(s)
      竹内徹也
    • Organizer
      日本物理学会
    • Place of Presentation
      千葉大学
    • Year and Date
      2006-09-23
    • Related Report
      2008 Final Research Report
  • [Presentation] CePt_3Siにおける磁性と超伝導の比熱による研究2006

    • Author(s)
      竹内徹也
    • Organizer
      日本物理学会
    • Place of Presentation
      愛媛大学・松山大学
    • Year and Date
      2006-03-27
    • Related Report
      2008 Final Research Report
  • [Presentation] CeTX_3(T : 遷移金属, X ; Si, Ge)の磁性2006

    • Author(s)
      下田哲哉
    • Organizer
      日本物理学会
    • Place of Presentation
      愛媛大学・松山大学
    • Year and Date
      2006-03-27
    • Related Report
      2008 Final Research Report
  • [Presentation] Metamagnetic transition in RRhIn5 compounds(R : Nd, Tb, Dy and Ho)2006

    • Author(s)
      N. V. Hieu
    • Organizer
      日本物理学会
    • Place of Presentation
      愛媛大学・松山大学
    • Year and Date
      2006-03-27
    • Related Report
      2008 Final Research Report

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Published: 2006-04-01   Modified: 2020-05-15  

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