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Charge and Spin Coupling in 3d-Transition-Metal Oxides with Perovskite-Related Structures

Research Project

Project/Area Number 05452050
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 固体物性Ⅱ(磁性・金属・低温)
Research InstitutionThe University of Tokyo

Principal Investigator

UCHIDA Shinichi  The University of Tokyo, Faculty of Engineering, Department of Applied Physics, Professor, 工学部, 教授 (10114399)

Co-Investigator(Kenkyū-buntansha) EISAKI Hiroshi  The University of Tokyo, Faculty of Engineering, Department of Applied Physics,, 工学部, 助手 (20242018)
高木 英典  東京大学, 工学部, 講師 (40187935)
Project Period (FY) 1993 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥5,200,000 (Direct Cost: ¥5,200,000)
Fiscal Year 1994: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1993: ¥3,700,000 (Direct Cost: ¥3,700,000)
KeywordsTransition-Metal Oxides / Charge-Spin Coupling / Optical Conductivity / Mid-IR Band / Carrier Doping / Quantum Spin Fluid / Ni化合物 / 低次元磁性体 / 金属-絶縁体転移 / ホウ素-炭素系新超伝導体
Research Abstract

The present research aimed to elucidate the charge dynamics of doped holes in a series of 3d-transition-metal oxides with perovskite-related structures. These oxides are basically antiferromagnetic insulators. We demonstrate by the potical spectroscopy that as the spin system is diluted or the long-range spin order is frustrated by the doped holes, the spectral weight is transferred from high-energy to low-energy region. The low-energy excitations form a so-called mid-IR absorption band which is generic to all 3d-transition-metal oxides doped with holes. The intensity of the mid-IR band is connected with the local spin order. The close connection between the spin system and the charge dynamics is most vividly displayd in the high-T_c Cu oxides owing to strong spin fluctuations in two dimensions. The research has been extended to one-dimensional Ni and Cu oxides in which some quantum spin fluid is formed even in a parent insulator due to much stronger spin fluctuations in one dimension. The presence of quantum spin fluid has been confirmed by muSR experiment for Y_2BaNiO_5, and hole doping into this compound has been successfully done, though the compound remains to be insulating. The result and strategy developed in the present research will provide a basis for future study of the charge dynamics in doped quantum spin fluid.

Report

(3 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • Research Products

    (36 results)

All Other

All Publications (36 results)

  • [Publications] A.Keren: "μSR measurements in infinite-layer and-chain cuprates" Phys.Rev.B. 48. 926-935 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] S.Uchida: "Recent Progress in High-Tc Superconductor Research" Jpn.J.Apple.Phys.32. 3784-3798 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] S.Uchida: "Interplane charge Dynamics in High-Tc Copper Oxides" J.Low Temp.Phys.95. 109-121 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] K.Tamasaku: "Interplane Charge Dynamics in La_<2-x>Sr_xCuO_4" Phys.Rev.Lett. 72. 3088-3091 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Eisaki: "Competition between magnetism and Superanductivity" Phys.Rev.B.50. 647-650 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] K.Kojima: "μSR and magnetic susceptibility measurements in Haldane System" Phys.Rev.Lett. 74. (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] A.Keren: ""muSR measurements in infinite-layr and infinite-chain cuprate antiferromagnets"" Phys.Rev.B48. 926-935 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] S.Uchida: ""Recent Progress in High-T_c Superconductor Research"" Jpn.J.Appl.Phys.32. 3784-3798 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] S.Uchida: ""Interplane Charge Dynamics in High-T_c Superconductors"" J.Low Temp.Phys.95. 109-121 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] K.Tamasaku: ""Interplane Charge Dynamics in La_<2-x>Sr_xCuO_4"" Phys.Rev.Lett.72. 3088-3091 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] H.Eisaki: ""Competition between magnetism and superconductivity in rare-earth nickel boride carbides"" Phys.Phys.Rev.B50. 647-650 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] K.Kojima: ""muSR amd magnetic susceptibility measurements in Haldane system" Phys.Rev.Lett.(to appear).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] A.Keren: "μSR measurements in infinite-layer and-chain cuprates" Phys.Rev.B. 48. 926-935 (1993)

    • Related Report
      1994 Annual Research Report
  • [Publications] S.Uchida: "Recent progress in High-Tc Superconductor Research" Jpn.J.Apple.Phys.32. 3784-3798 (1993)

    • Related Report
      1994 Annual Research Report
  • [Publications] S.Uchida: "Interplane charge Dynamics in High-Tc Copper Oxides" J.Low Temp.Phys. 95. 109-121 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] K.Tamasaku: "Interplane Charge Dynamics in La_<2-x>Sr_xCuO_4" Phys.Rev.Lett.72. 3088-3091 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] H.Eisaki: "Competition between magnetism and Superconductivity" Phys.Rev.B. 50. 647-650 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] K.Kojima: "μSR and magnetic susceptibility measurements in Haldane system" Phys.Rev.Lett.74. (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] R.J.Cava: "Superconductivity in the quarternary intermetallic compounds LnNi_2B_2C" Nature(London). 367. 252-253 (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] R.J.Cava: "Superconductivity at 23 K in yttrium palladium boride carbide" Nature(London). 367. 146-148 (1994)

    • Related Report
      1993 Annual Research Report
  • [Publications] T.Katsufuji: "Symmetry-dependent electronic Ramanscattering in La_<2-x>Sr_xCuO_4" Phys.Rev.B. 48. 131-134 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] A.Keren: "μSR measurements in infinite-layer and infinite-chain cuprates" Phys.Rev.B. 48. 926-935 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] J.D.Sullivan: "Electron-density Fourier maps of an untwinned YBa_2Cu_3O_<6.877>" Phys.Rev.B. 48. 10638-10641 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] S.Uchida: "Recent progress in High-Tc Superconductor research" Jpn.J.Appl.Phys.32. 3784-3798 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] H.Sato: "Superconducting and normal states of Ba_<1-x>K_xBiO_3" Phys.Rev.B. 48. 6617-6625 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] T.Arima: "Optical spectra of Pr_<2-x>Ce_xCuO_<4-δ> crystals" Phys.Rev.B. 48. 6597-6603 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] M.Abbate: "Electronic structure and spin-state transition of LaCoO_3" Phys.Rev.B. 47. 124-130 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] S.Tajima: "Optical study of(L_1,Ce)_2(Ba,L_2)_2Cu_3O_<8+x>" Phys.Rev.B. 47. 126-133 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] T.Ito: "Systematic deviation from T-linear behavior in the resistivity of YBa_2Cu_3O_<7-y>" Phys.Rev.Lett.70. 3995-3998 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] I.Hase: "Electronic structure and metal-insulator transitions in Ti and V oxides" Physica B. 186-188. 1074-1076 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] A.Fujimori: "Evolution of the spectral function in Mott-Hubbard systems" Physica B. 186-188. 981-985 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] S.Uchida: "Electron correlation and optical conductivity in high Tc cuprates" Physica B. 186-188. 975-980 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] M.Kasuya: "Optical spectra of Y_<1-x>Ca_xVO_3" Phys.Rev.B. 47. 6197-6202 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] Y.Nakamura: "Anisotropic transport properties of La_<2-x>Sr_xCuO_4" Phys.Rev.B. 47. 8369-8372 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] E.Pellegrin: "Orbital character of states at the Fermi level in La_<2-x>Sr_xCuO_4" Phys.Rev.B. 47. 3354-3367 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] K.Tatsuhara: "Magnetoresistance and upper critical fields of Ba_<1-x>K_xBiO_3" Physica C. 212. 459-464 (1993)

    • Related Report
      1993 Annual Research Report

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Published: 1993-04-01   Modified: 2020-05-15  

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