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Quantum Critical Point of Heavy Fermion System with Anti-ferromagnetism and superconductivity

Research Project

Project/Area Number 24540366
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Condensed matter physics II
Research InstitutionYokohama National University

Principal Investigator

UMEHARA Izuru  横浜国立大学, 工学(系)研究科(研究院), 教授 (90251769)

Project Period (FY) 2012-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2012: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords重い電子系 / 超伝導 / 反強磁性 / 異方的ギャップ / 回転磁場中比熱測定 / 高圧下比熱測定 / 高圧力 / 圧力 / 磁場 / 比熱
Outline of Final Research Achievements

It has been investigated the properties of superconducting states of anti-ferromagnetic heavy fermion system under high pressure by heat capacity measurements. We shed light on the non-inversion symmetry compounds CeRhSi3 and CeIrSi3 and typical pressure induced superconductor CeRhIn5 and CeIn3. In all compounds, we found the increasing phenomena in heat capacity at Quantum Critical Points (QCP). These results suggest the states of the Non-Fermi-Liquid (NFL) and/or the Spin Fluctuation (SF) appeared universally. The increasing of the NFL and/or the SF at QCP plays important role creating the Cooper Pair in these compounds. Moreover, p or d symmetry superconducting states (the anisotropic superconducting gap) would be appeared in this system by the observation of heat capacity measurements in the rotation magnetic fields.

Report

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

    (18 results)

All 2014 2013 2012

All Journal Article (4 results) (of which Peer Reviewed: 4 results) Presentation (14 results)

  • [Journal Article] Pressure Effects of Nd3.5Sm0.5Ni3O8 and La3-xNdxNi2O62014

    • Author(s)
      Yoshiki Sakurai, Shunsuke Sakura, Guanghui Hu, Shunpeita Suzuki, Izuru Umehara, Yoshihide Kimishima, and Masatomo Uehara
    • Journal Title

      JPS Conf. Proc.

      Volume: 1

    • DOI

      10.7566/jpscp.1.012086

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Magnetic Properties of HoNi Single Crystal Under High Pressure2014

    • Author(s)
      Nobuyuki KINAMI, Guanghui HU and Izuru UMEHARA
    • Journal Title

      JPS Conf. Proc.

      Volume: 3

    • DOI

      10.7566/jpscp.3.017012

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Magnetic properties and magnetocaloric effect of GdCr2Si2 compound under hydrostatic pressure2013

    • Author(s)
      Li Lingwei, Hu Guanghui, I.Umehara,D.Huo,T.Namiki,K.Nishimura
    • Journal Title

      JOURNAL OF ALLOYS AND COMPOUNDS

      Volume: 575 Pages: 1-4

    • DOI

      10.1016/j.jallcom.2013.04.081

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Pressure Effects on Magnetic and Magnetocaloric Properties of GdCo_2B_22012

    • Author(s)
      Lingwei Li, G Hu, I. Umehara, D. Huo, T. Namiki, and K. Nishimura
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 81 Issue: 7 Pages: 73701-73703

    • DOI

      10.1143/jpsj.81.073701

    • Related Report
      2012 Research-status Report
    • Peer Reviewed
  • [Presentation] 圧力誘起超伝導体 CeTSi3 の超伝導ギャップ2014

    • Author(s)
      梅原 出・木村 憲昭・松林 和幸・上 床 美也
    • Organizer
      第55回高圧討論会
    • Place of Presentation
      徳島大学
    • Year and Date
      2014-11-22 – 2014-11-24
    • Related Report
      2014 Annual Research Report
  • [Presentation] CeRh2Si2の圧力下での交流熱容量測定2014

    • Author(s)
      亀井由樹,梅原出,上床美也,松林和幸
    • Organizer
      日本物理学会2014秋季大会
    • Place of Presentation
      中部大学
    • Year and Date
      2014-09-07 – 2014-09-10
    • Related Report
      2014 Annual Research Report
  • [Presentation] CeIn3の高圧力下での比熱測定2014

    • Author(s)
      加藤貫,梅原出,上床美也,松林和幸
    • Organizer
      日本物理学会2014秋季大会
    • Place of Presentation
      中部大学
    • Year and Date
      2014-09-07 – 2014-09-10
    • Related Report
      2014 Annual Research Report
  • [Presentation] CeRhIn5の圧力下での比熱測定2014

    • Author(s)
      國見遼一,梅原出,上床美也,松林和幸
    • Organizer
      日本物理学会2014秋季大会
    • Place of Presentation
      中部大学
    • Year and Date
      2014-09-07
    • Related Report
      2014 Annual Research Report
  • [Presentation] CeRhIn5の高圧下での比熱測定2013

    • Author(s)
      國見遼一、朝日啓太、梅原出、上床美也 、松林和幸
    • Organizer
      高圧討論会
    • Place of Presentation
      朱鷺メッセ 新潟コンベンションセンター
    • Related Report
      2013 Research-status Report
  • [Presentation] CeIn3の高圧下での比熱測定2013

    • Author(s)
      加藤貫、梅原出、上床美也 、松林和幸
    • Organizer
      高圧討論会
    • Place of Presentation
      朱鷺メッセ 新潟コンベンションセンター
    • Related Report
      2013 Research-status Report
  • [Presentation] Magnetic Transitions under Pressure in GdCo2B22012

    • Author(s)
      Guanghui Hu, Izuru Umehara
    • Organizer
      ICM2012
    • Place of Presentation
      Seoul, Korea
    • Related Report
      2012 Research-status Report
  • [Presentation] CeRhSi3の高圧力下磁場中熱容量測定2012

    • Author(s)
      篠塚真仲,福村啓介,朝日啓太,梅原出,木村憲彰A,上床美也,松林和幸,辺土正人
    • Organizer
      日本物理学会
    • Place of Presentation
      横浜国立大学
    • Related Report
      2012 Research-status Report
  • [Presentation] CeIrSi3の高圧力下磁場中交流法比熱測定2012

    • Author(s)
      朝日啓太,篠塚真仲,福村啓介,梅原出,摂待力生,上床美也,松林和幸,辺土正人
    • Organizer
      日本物理学会
    • Place of Presentation
      横浜国立大学
    • Related Report
      2012 Research-status Report
  • [Presentation] EuCo2P2とYbMn2Ge2の高圧下交流法熱容量測定2012

    • Author(s)
      鈴木俊平太,梅原出,藤原哲也
    • Organizer
      日本物理学会
    • Place of Presentation
      横浜国立大学
    • Related Report
      2012 Research-status Report
  • [Presentation] FeSe系の圧力下超伝導特性2012

    • Author(s)
      小松誠治,梅原出,水口佳一,高野義彦,Shixun Cao
    • Organizer
      日本物理学会
    • Place of Presentation
      横浜国立大学
    • Related Report
      2012 Research-status Report
  • [Presentation] Gd2Te5の高圧力下物性2012

    • Author(s)
      加田野隼矢,梅原出,綿貫竜太,鈴木和也,杉山大樹
    • Organizer
      日本物理学会
    • Place of Presentation
      横浜国立大学
    • Related Report
      2012 Research-status Report
  • [Presentation] 希土類金属のTe化合物の基礎物性2012

    • Author(s)
      杉山大樹,梅原出,綿貫竜太,鈴木和也,加田野隼矢
    • Organizer
      日本物理学会
    • Place of Presentation
      横浜国立大学
    • Related Report
      2012 Research-status Report
  • [Presentation] CeRhSi3の圧力下磁場中熱容量測定2012

    • Author(s)
      梅原出・福村啓介・篠塚真仲・木村憲明
    • Organizer
      高圧討論会
    • Place of Presentation
      大阪大学
    • Related Report
      2012 Research-status Report

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Published: 2013-05-31   Modified: 2020-05-15  

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