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Investigation of Alkaline metal vibration effect on the electric states in β-pyrochlore oxides

Research Project

Project/Area Number 21740257
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Condensed matter physics II
Research InstitutionHiroshima University

Principal Investigator

HASEGAWA Takumi  Hiroshima University, 大学院・総合科学研究科, 助教 (20508171)

Project Period (FY) 2009 – 2010
Project Status Completed (Fiscal Year 2010)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2009: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywords強相関電子系 / ラットリング / パイロクロア酸化物 / ラマン分光 / 非調和相互作用 / 格子振動
Research Abstract

Alkaline atoms in the β-pyrochlore oxides vibrate with unusually large amplitude. The large amplitude vibrations are expected to take an important role in the superconducting state of the -pyrochlore oxides. In this investigation, anharmonicity of the vibrations, which characterizes the anomaly of the large amplitude vibrations, is successfully estimated, and it is revealed that K vibrations in KOs_2O_6 possess anomalously large anharmonicity. From a series of anharmonicity investigations, an important factor to affect anharmonicity has been determined, and a principle to realize large anharmonicity has been revealed.

Report

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

    (24 results)

All 2010 2009

All Journal Article (9 results) (of which Peer Reviewed: 9 results) Presentation (15 results)

  • [Journal Article] Lattice dynamical study of alkaline atom vibrations with anharmonic interactions in b-pyrochlore oxides2010

    • Author(s)
      T.Hasegawa, N.Ogita, Y.Nagao, J.Yamaura, Z.Hiroi, M.Udagawa
    • Journal Title

      Physica C: superconductivity and its application vol.470

      Pages: 695-696

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Takabatake, Off-center rattling modes and glasslike thermal conductivity in the type-I clathrate Ba8Ga16Sn302010

    • Author(s)
      K.Suekuni, Y.Takasu, T.Hasegawa, N.Ogita, M.Udagawa, M.A.Avila, T.
    • Journal Title

      Physical Review B vol.81

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Takabatake, Off-center rattling and cage vibrations of the carrier-tuned type-I clathrate Ba8Ga16Ge30 studied by Raman scattering2010

    • Author(s)
      Y.Takasu, T.Hasegawa, N.Ogita, M.Udagawa, M.A.Avila, K.Suekuni, T.
    • Journal Title

      Physical Review B vol.82

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Raman scattering study in iridium pyrochlore oxides2010

    • Author(s)
      T.Hasegawa, N.Ogita, K.Matsuhira, S.Takagi, M.Wakeshima, Y.Hinatsu, M.Udagawa
    • Journal Title

      Journal of Physics: Conference Series vol.200

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Lattice dynamical study of alkaline atom vibrations with anharmonic interactions in β-pyrochlore oxides2010

    • Author(s)
      Takumi Hasegawa
    • Journal Title

      Physica C : Superconductivity and its Application

      Volume: 470

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Off-center rattling modes and glasslike thermal conductivity in the type-I clathrate Ba_8Ga_<16>Sn_<30>2010

    • Author(s)
      Koichiro Suekuni
    • Journal Title

      Physical Review B

      Volume: 81

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Off-center rattling and cage vibration of the carrier-tuned type-I clathrate Ba_8Ga_<16>Ge_<30> studied by Raman scattering2010

    • Author(s)
      Yuichi Takasu
    • Journal Title

      Physical Review B

      Volume: 82

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Raman scattering study in iridium pyrochlore oxides2010

    • Author(s)
      Takumi Hasegawa
    • Journal Title

      Journal of Physics : Conference Series 200

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Lattice dynamical study of alkaline atom vibrations with anharmonic in teractions in β-pyrochlore oxides2010

    • Author(s)
      Takumi Hasegawa
    • Journal Title

      Physica C : Superconductivity and its applications (掲載決定)

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Presentation] スクッテルダイト化合物の格子振動と構造安定性2010

    • Author(s)
      長谷川巧
    • Organizer
      室蘭工業大学中期目標重点研究プロジェクト研究会
    • Place of Presentation
      室蘭市
    • Year and Date
      2010-11-27
    • Related Report
      2010 Final Research Report
  • [Presentation] スクッテルダイト化合物の格子振動と構造安定性2010

    • Author(s)
      長谷川巧
    • Organizer
      室蘭工業大学中期目標重点研究プロジェクト研究会
    • Place of Presentation
      室蘭市(招待講演)
    • Year and Date
      2010-11-27
    • Related Report
      2010 Annual Research Report
  • [Presentation] パイロクロア酸化物Cd2Os2O7のラマン散乱2010

    • Author(s)
      長谷川巧
    • Organizer
      日本物理学会2010年秋季大会
    • Place of Presentation
      堺市
    • Year and Date
      2010-09-25
    • Related Report
      2010 Final Research Report
  • [Presentation] パイロクロア酸化物Cd_2Os_2O_7のラマン散乱2010

    • Author(s)
      長谷川巧
    • Organizer
      日本物理学会2010年秋季大会
    • Place of Presentation
      堺市
    • Year and Date
      2010-09-25
    • Related Report
      2010 Annual Research Report
  • [Presentation] カゴ状物質の格子振動2009

    • Author(s)
      長谷川巧
    • Organizer
      重い電子系若手秋の学校
    • Place of Presentation
      京都市
    • Year and Date
      2009-11-24
    • Related Report
      2010 Final Research Report 2009 Annual Research Report
  • [Presentation] Guest modes in β-pyrochlore osmium oxides2009

    • Author(s)
      T.Hasegawa
    • Organizer
      4th Hiroshima Workshop on Sustainable Materials Science
    • Place of Presentation
      Higashi-Hiroshima
    • Year and Date
      2009-11-13
    • Related Report
      2010 Final Research Report
  • [Presentation] Guest modes in β-pyrochlore osmium oxide2009

    • Author(s)
      Takumi Hasegawa
    • Organizer
      The 4th Hiroshima Workshop on Sustainable Materials Science
    • Place of Presentation
      東広島市
    • Year and Date
      2009-11-13
    • Related Report
      2009 Annual Research Report
  • [Presentation] β-パイロクロア酸化物における非調和振動モデル2009

    • Author(s)
      長谷川巧
    • Organizer
      日本物理学会2009年秋季大会
    • Place of Presentation
      熊本市
    • Year and Date
      2009-09-27
    • Related Report
      2010 Final Research Report 2009 Annual Research Report
  • [Presentation] Lattice dynamical study of alkaline atom vibrations with anharmonic interactions in b-pyrochlore oxides2009

    • Author(s)
      T.Hasegawa
    • Organizer
      9th International Conference on Materials and Mechanisms of Superconductivity
    • Place of Presentation
      Shinjuku
    • Year and Date
      2009-09-09
    • Related Report
      2010 Final Research Report
  • [Presentation] Lattice dynamical study of alkaline atom vibrations with anharmonic in teractions in β-pyrochlore oxides2009

    • Author(s)
      Takumi Hasegawa
    • Organizer
      9th International Conference on Materials and Mechanisms of Superconductivity
    • Place of Presentation
      新宿区
    • Year and Date
      2009-09-09
    • Related Report
      2009 Annual Research Report
  • [Presentation] Rattling vibrations and electron-lattice interactions2009

    • Author(s)
      長谷川巧
    • Organizer
      新学術領域「重い電子の秩序化」第二回研究会
    • Place of Presentation
      東広島市
    • Year and Date
      2009-08-18
    • Related Report
      2010 Final Research Report 2009 Annual Research Report
  • [Presentation] Raman scattering study in indium pyrochlore oxides2009

    • Author(s)
      T.Hasegawa
    • Organizer
      International Conference on Magnetism 2009
    • Place of Presentation
      Karlsruhe Germany
    • Year and Date
      2009-07-27
    • Related Report
      2010 Final Research Report
  • [Presentation] Raman scattering study in iridium pyrochlore oxides2009

    • Author(s)
      Takumi Hasegawa
    • Organizer
      International Conference on Magnetism 2009
    • Place of Presentation
      Karlsruhe, Germany
    • Year and Date
      2009-07-27
    • Related Report
      2009 Annual Research Report
  • [Presentation] Estimation of Inter-atomic Interactions with Large-amplitude Vibration for b-pyrochlore Compounds2009

    • Author(s)
      T.Hasegawa
    • Organizer
      15th International Symposium on Intercalation Compounds
    • Place of Presentation
      Beijing China
    • Year and Date
      2009-05-14
    • Related Report
      2010 Final Research Report
  • [Presentation] Estimation of Inter-atomic Interactions with Large-amplitude Vibration for β-pyrochlore Compounds2009

    • Author(s)
      Takumi Hasegawa
    • Organizer
      15th International Symposium on Intercalation Compounds
    • Place of Presentation
      Beijing, China
    • Year and Date
      2009-05-14
    • Related Report
      2009 Annual Research Report

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

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