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Evolution of physical properties by the transition from intermediate valence to heavy fermion state

Research Project

Project/Area Number 19740221
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Condensed matter physics II
Research InstitutionNational Institute for Materials Science

Principal Investigator

TSUJII Naihito  National Institute for Materials Science, 量子ビームセンター, 主任研究員 (90354365)

Project Period (FY) 2007 – 2008
Project Status Completed (Fiscal Year 2008)
Budget Amount *help
¥3,600,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥300,000)
Fiscal Year 2008: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2007: ¥2,300,000 (Direct Cost: ¥2,300,000)
Keywords強相関系 / 価数揺動 / 重い電子系 / 非フェルミ液体 / 価数揺動系 / f電子系 / 結晶場分裂 / 近藤温度 / 量子臨界点 / 磁性 / 超伝導
Research Abstract

価数揺動はf電子系の重要課題であるが、近藤温度が低い物質においては、この効果はほとんど無視されてきた。本研究では量子臨界点に近いYbCu3.5Al1.5や磁気秩序を示すYbCu3Al2においても価数揺動が起きていることを、試料作成と物性測定により明らかにした。また半導体FeGa3やFeSiは価数揺動によってバンドギャップが開いている可能性が議論されていたが、本研究により古典的バンド半導体であることが示された。

Report

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

    (19 results)

All 2008 2007 Other

All Journal Article (10 results) (of which Peer Reviewed: 6 results) Presentation (7 results) Remarks (2 results)

  • [Journal Article] Observation of Energy Gap in FeGa32008

    • Author(s)
      N. Tsujii, H. Yamaoka, M. Matsunami, R. Eguchi, Y. Ishida, Y. Senba, H. Ohashi, S. Shin, T. Furubayashi, H. Abe, H. Kitazawa
    • Journal Title

      Journal of the Physical Society of Japan vol.77

    • Related Report
      2008 Final Research Report
  • [Journal Article] The semiconductor to metal transition in FeSi1-xGex probed by high resolutionx-ray absorption spectroscopy2008

    • Author(s)
      N. Tsujii, H. Yamaoka, H. Oohashi, I. Jarrige, D. Nomoto, K. Takahiro, K. Ozaki, K. Kawatsura
    • Journal Title

      Physica B vol.40

      Pages: 922-924

    • Related Report
      2008 Final Research Report
  • [Journal Article] Bulk sensitive spectroscopy for the valence transition in YbInCu4-based compounds2008

    • Author(s)
      H. Yamaoka, N. Tsujii, K. Yamamoto, A. M. Vlaicu, H. Oohashi, H. Yoshikawa, T. Tochio, Y. Ito, A. Chainani, S. Shin
    • Journal Title

      Physical Review B 78

      Pages: 45127-45127

    • Related Report
      2008 Final Research Report
  • [Journal Article] Observation of Energy Gap in FeGa32008

    • Author(s)
      Naohito Tsujii
    • Journal Title

      Journal of the Physical Society of Japan 77

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The semiconductor to metal transition in FeSil-xGex probed by high resolution X-ray absorption spectroscopy2008

    • Author(s)
      N. Tsujii
    • Journal Title

      Physica B 403

      Pages: 922-924

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Bulk sensitive spectroscopy for the valence transition in YbInCu4-based compounds2008

    • Author(s)
      H. Yamaoka
    • Journal Title

      Physical Review B 78

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The semiconductor to metal transition in FeSi1-xGex probed by high resolution X-ray absorption spectroscopy2008

    • Author(s)
      N. Tsujii, 他
    • Journal Title

      Physica B 403

      Pages: 922-924

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Observation of Energy Gap in FeGa32008

    • Author(s)
      N. Tsujii, 他
    • Journal Title

      Journal of the Physical Society of Japan 77

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Intermediate-valence behavior of YbCu5-xAlx around quantum critical point measured by resonant inelasticx-ray scattering at Yb L3 absorption edge2007

    • Author(s)
      K. Yamamoto, H. Yamaoka, N. Tsujii, A. M. Vlaicu, H. Oohashi, S. Sakakura, T. Tochio, Y. Ito, A. Chainani, S. Shin
    • Journal Title

      Journal of the Physical Society of Japan vol.76

    • Related Report
      2008 Final Research Report
  • [Journal Article] Intermediate-Valence Behavior of YbCu5-xAlx around Quantum Critical Point Measured by Resonant Inelastic X-ray Scattering at Yb L3 Absorption Edge2007

    • Author(s)
      K. Yamamoto, 他
    • Journal Title

      Journal of the Physical Society of Japan 76

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Presentation] 超伝導体YbGaxSi2-xの組成依存性2008

    • Author(s)
      辻井直人 他
    • Organizer
      粉体粉末冶金協会
    • Place of Presentation
      早稲田大学
    • Year and Date
      2008-05-28
    • Related Report
      2008 Final Research Report
  • [Presentation] 超伝導体YbGaxSi2-xの組成依存性2008

    • Author(s)
      辻井直人
    • Organizer
      粉体粉末冶金協会平成20年度春季大会
    • Place of Presentation
      早稲田大学
    • Year and Date
      2008-05-28
    • Related Report
      2008 Annual Research Report
  • [Presentation] 超伝導体YbGaxSi2-xの作成と物性2008

    • Author(s)
      辻井直人 他
    • Organizer
      日本物理学会
    • Place of Presentation
      近畿大学
    • Year and Date
      2008-03-23
    • Related Report
      2008 Final Research Report
  • [Presentation] FeGa3におけるエネルギーギャップの観測2008

    • Author(s)
      辻井直人 他
    • Organizer
      日本物理学会
    • Place of Presentation
      近畿大学
    • Year and Date
      2008-03-23
    • Related Report
      2008 Final Research Report
  • [Presentation] 超伝導体YbGaxSi2-xの作成と物性2008

    • Author(s)
      辻井直人, 他
    • Organizer
      日本物理学会 第63回年次大会
    • Place of Presentation
      近畿大学
    • Year and Date
      2008-03-23
    • Related Report
      2007 Annual Research Report
  • [Presentation] FeGa3におけるエネルギーギャップの観測2008

    • Author(s)
      辻井直人, 他
    • Organizer
      日本物理学会 第63回 年次大会
    • Place of Presentation
      近畿大学
    • Year and Date
      2008-03-23
    • Related Report
      2007 Annual Research Report
  • [Presentation] Superconductivity in YbGaxSi2-x with the AlB2-type structure2008

    • Author(s)
      辻井直人 他
    • Organizer
      アメリカ物理学会
    • Place of Presentation
      ニューオーリンズコンベンションセンター
    • Year and Date
      2008-03-12
    • Related Report
      2008 Final Research Report 2007 Annual Research Report
  • [Remarks]

    • URL

      http://www.nims.go.jp/nsg/tsujii/index.html

    • Related Report
      2008 Annual Research Report
  • [Remarks]

    • URL

      http://www.nims.go.jp/nsg/tsujii/

    • Related Report
      2007 Annual Research Report

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Published: 2007-04-01   Modified: 2020-05-15  

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