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2008 Fiscal Year Final Research Report

Interrelation between charge- and spin-density modulation in high-Tc superconductors

Research Project

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Project/Area Number 19540358
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

HIRAKA Haruhiro  Tohoku University, 金属材料研究所, 助教 (90323097)

Co-Investigator(Kenkyū-buntansha) MATSUMURA Daiju  日本原子力研究開発機構, 関西光科学研究所, 研究員 (30425566)
Research Collaborator WAKIMOTO Syuichi  日本原子力研究開発機, 量子ビーム部門, 副研究主 (40399415)
KUDO Kazutaka  東北大学, 金属材料研究所, 助教 (40361175)
SATO Takafumi  東北大学, 大学院・理学研究科, 助教 (10361065)
KADONO Ryosuke  高エネルギー加速器研究機構, 物質構造科学研究所, 教授 (10194870)
YAMADA Kazuyoshi  東北大学, 原子分子材料科学高等研究機構, 教授 (70133923)
Project Period (FY) 2007 – 2008
Keywords高温超伝導 / 電荷・スピン密度変調 / 中性子散乱 / XAFS / 不純物効果
Research Abstract

銅酸化物高温超伝導体におけるスピン密度変調(SDM)と電荷密度変調(CDM)を、不純物効果の側面から、中性子散乱とX線吸収微細構造分光の組み合わせにより調査した。La2-xSrxCuO4(LSCO)とBi2Sr2CuO6(Bi2201)を用い、ホールとSDMの強い関連、及び、銅酸化物におけるSDMの共通性を示す結果を得た。また、LSCOとBi2201で系による個性はあるものの、動的なCDMが銅酸化物に存在する可能性を示した。

  • Research Products

    (19 results)

All 2009 2008 2007

All Journal Article (10 results) (of which Peer Reviewed: 10 results) Presentation (9 results)

  • [Journal Article] Dual Nature of a Ni Dopant in the Hole-Type La_<2-x>Sr_xCuO_4 Cuprate Superconductor2009

    • Author(s)
      H. Hiraka, D. Matsumura, Y. Nishihata, J. Mizuki, K. Yamada
    • Journal Title

      Phys. Rev. Lett 102

      Pages: 037002

    • Peer Reviewed
  • [Journal Article] Charge and spin ordering in La_<2-x>Sr_xCoO_4(0.4<x<0.6)2009

    • Author(s)
      K. Horigane, T. Uchida, H. Hiraka,K. Yamada, J. Akimitsu
    • Journal Title

      Nucul. Inst. Meth. Phys. Res. A 600

      Pages: 243

    • Peer Reviewed
  • [Journal Article] Neutron Diffraction Study of Martensitic Transformation of Off-Stoichiometric Single-Crystal Ni_2MnGa2009

    • Author(s)
      K. Inoue, Y. Yamaguchi, H. Hiraka, T. Shishido, H. Maeda, Y. Tsunoda
    • Journal Title

      J. Phys. Soc. Jpn 78

      Pages: 034602

    • Peer Reviewed
  • [Journal Article] Search of Long-Range Magnetic Ordering in Superconducting Five-Layered Cuprate2008

    • Author(s)
      C.-H. Lee, A. Iyo, K. Kihou, H. Kito,H. Hiraka, K. Ohoyama, K. Yamada
    • Journal Title

      J. Phys. Soc. Jpn 77

      Pages: 073706

    • Peer Reviewed
  • [Journal Article] Resonance-Like Magnetic Excitations in Spinel Ferrimagnets FeCr_2O_4 and NiCr_2O_4 Observed by Neutron Scattering2008

    • Author(s)
      K. Tomiyasu, H. Hiraka, K. Ohoyama, K. Yamada
    • Journal Title

      J. Phys. Soc. Jpn 77

      Pages: 124703

    • Peer Reviewed
  • [Journal Article] Ni-impurity effect in high-T_c cuprates studied by neutron scattering and XAFS spectroscopy2008

    • Author(s)
      H. Hiraka, S. Wakimoto, M. Matsuda, D. Matsumura, Y. Nishihata, J. Mizuki, K. Yamada
    • Journal Title

      J. Phys. Chem. Solids 69

      Pages: 3136

    • Peer Reviewed
  • [Journal Article] Impurity effect on spin correlations in lightly doped La_<2-x>Sr_xCuO_42008

    • Author(s)
      M. Matsuda, H. Hiraka, M. Fujita, S. Ohta, S. Wakimoto, K. Yamada
    • Journal Title

      J. Phys. Chem. Solids 69

      Pages: 3181

    • Peer Reviewed
  • [Journal Article] Competition of Magnetic and Quadrupolar Order Parameters in HoB_42008

    • Author(s)
      D. Okuyama, T. Matsumura, T. Mouri, N. Ishikawa, K. Ohoyama, H. Hiraka, H. Nakao, K. Iwasa, and Y. Murakami
    • Journal Title

      J. Phys. Soc. Jpn 77

      Pages: 074703

    • Peer Reviewed
  • [Journal Article] Ni-Impurity Effects on Incommensurate Spin Correlations in the Superconducting Phase of La_<2-x>Sr_xCuO_4 near the Spin-Glass Phase Boundary2007

    • Author(s)
      H. Hiraka, S. Ohta, S. Wakimoto, M. Matsuda, K. Yamada
    • Journal Title

      J. Phys. Soc. Jpn 76

      Pages: 074703

    • Peer Reviewed
  • [Journal Article] Spin and Charge Orders and Their Hole-Doping Dependence in Single Layered Cobaltate La_<2-x>Ca_xCoO_4(0.3≦x≦0.8)2007

    • Author(s)
      K. Horigane, H. Hiraka, T. Uchida, K. Yamada, J. Akimitsu
    • Journal Title

      J. Phys. Soc. Jpn 76

      Pages: 114715

    • Peer Reviewed
  • [Presentation] Recent Activities of IMR Neutron Group for Neutron-Monochromator Renovation in JRR-32009

    • Author(s)
      H. Hiraka, Y. Miyake, Y. Yamaguchi, K. Ohoyama, K. Yamada
    • Organizer
      2009 WPI-AIMR Annual Workshop
    • Place of Presentation
      蔵王ロイヤルホテル(宮城県)
    • Year and Date
      20090302-06
  • [Presentation] 中性子散乱用Ge単結晶モノクロメータの高度化2009

    • Author(s)
      三宅悠子、平賀晴弘、山口泰男、大山研司、山田和芳
    • Organizer
      日本物理学会年会
    • Place of Presentation
      立教大学
    • Year and Date
      2009-03-27
  • [Presentation] FeSe_<1-x>Te_xの超伝導と結晶構造依存性2009

    • Author(s)
      堀金和正、平賀晴弘、大山研司
    • Organizer
      日本物理学会年会
    • Place of Presentation
      立教大学
    • Year and Date
      2009-03-27
  • [Presentation] JRR-3装置群でのモノクロメータ高度化への金研の取り組み2008

    • Author(s)
      平賀晴弘、山口泰男、三宅悠子、大山研司、山田和芳、宍戸統悦、戸澤慎一郎、松浦直人、佐藤卓、廣田和馬、目時直人、松田雅昌
    • Organizer
      日本中性子科学会
    • Place of Presentation
      名古屋大学
    • Year and Date
      20081201-02
  • [Presentation] Emergence of magnetic modulations in the overdoped phase of Bi2201 by Fe dopoing2008

    • Author(s)
      H. Hiraka, S. Wakimoto, M. Takeda, K. Kakurai, K. Yamada
    • Organizer
      The 7th International Workshop on Polarized Neutrons in Condensed Matter Investigations
    • Place of Presentation
      茨城県東海村
    • Year and Date
      2008-09-01
  • [Presentation] μSRによるCuサイト置換Bi2201における磁気秩序の探査2008

    • Author(s)
      平賀晴弘, 山田和芳, 足立匡, 福永泰, 小池洋二, 山田幾也, 宮崎正範, 平石雅俊, 佐藤宏樹, 竹下聡史, 幸田章宏, 門野良典
    • Organizer
      日本物理学会年会
    • Place of Presentation
      近畿大学(大阪府)
    • Year and Date
      2008-03-24
  • [Presentation] XAFSで観る高温超伝導体におけるホール局在2008

    • Author(s)
      平賀晴弘、松村大樹、西畑保雄、水木純一郎、山田和芳
    • Organizer
      第3回JAEA放射光科学研究シンポジウム
    • Place of Presentation
      SPring-8(兵庫県佐用郡)
    • Year and Date
      2008-02-29
  • [Presentation] Cuサイト置換によるBi2201における磁気相関の探査2007

    • Author(s)
      平賀晴弘、林陽一郎、山田和芳
    • Organizer
      日本物理学会秋の分科会
    • Place of Presentation
      北海道大学
    • Year and Date
      2007-09-22
  • [Presentation] Ni impurity effect in high-T_c cuprates studied by Neutron Scattering and XAFS spectroscopy2007

    • Author(s)
      H. Hiraka, S. Wakimoto, M. Matsuda, D. Matsumura, Y. Nishihata, J. Mizuki, K. Yamada
    • Organizer
      cuprates studied by Neutron Scattering and XAFS spectroscopy
    • Place of Presentation
      仙台国際センター(仙台市)
    • Year and Date
      2007-08-21

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Published: 2010-06-10   Modified: 2014-06-19  

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