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Theoretical Study of Anomalous Metallic Propertices of Strongly Coupled Electrons.

Research Project

Project/Area Number 12640343
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 固体物性Ⅱ(磁性・金属・低温)
Research InstitutionNagoya University

Principal Investigator

KURODA Yoshihiro  Nagoya Univ., Physics Dept., Professor, 大学院・理学研究科, 教授 (60013504)

Co-Investigator(Kenkyū-buntansha) KOBAYASHI Akito  Nagoya Univ., Physics Dept., Assistant Professor, 大学院・理学研究科, 助手 (80335009)
ONO Yoshiaki  Nagoya Univ., Physics Dept., Associate Professor, 大学院・理学研究科, 助教授 (40221832)
松浦 民房  名古屋大学, 大学院・理学研究科, 教授 (10022609)
Project Period (FY) 2000 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 2002: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2001: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2000: ¥1,100,000 (Direct Cost: ¥1,100,000)
KeywordsStrongly Coupled Electrons / Cuprate / High-T_c Superconductors / Aniiferromaenetic Fluctuations / Superconducting Fluctuations / Pseudo-Gap / Heavy Electrons / Non-Fermi Liquids
Research Abstract

The pseudpgap in the single particle spectrum induced by the superconducting fluctuation together with the antiferromagnetic spin fluctuation has been believed to play key roles to determine essential features of anomalous properties of Cu-oxide high-T_c superconducting materials observed at temperatures higher than the superconducting transition temperature T_c. The roles are described as follows : In metals near Mott insulators, doped holes create new states inside the charge transfer gap called as ingap states, which have band width proportional to the hole doping rate δ and interact with each other through the superexchange interaction J_s enhanced by the antiferromagnetic spin fluctuation. This effective interaction promotes superconducting fluctuation, which induces a pseudogap in the single particle spectra. On the other hand, the pseudogap suppresses the spin fluctuation. Thus, effects of both of the spin fluctuation and the superconducting fluctuation need to be treated in a consistent way. In an underdoped system, the spin fluctuation dominates at higher temperatures, while the superconducting fluctuation or the pseudogap effect dominates at lower temperatures above T_c. This competition determines the anomalous temperature dependence of systems.
We have demonstrated the senario to work explicitly by taking the d-p model with the help of the 1/N-expansion theory and calculating T_c, the NMR relaxation rate 1/T_1 and the single-particle spectra. We have treated the spin fluctuation in the renormalized random phase approximation and the superconducting fluctuation in the renormalized t-matrix approximation, where the effective pairing interactions are mediated by the renormalized spin fluctuation.

Report

(4 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • Research Products

    (54 results)

All Other

All Publications (54 results)

  • [Publications] A.Kobayashi: "Pseudgap induced by superconducting fluctuation and anomalous metallic phase in the high-Tc superconducting materials"Physica B. 284&288part1. 661-662 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] H.Sato: "Critical study on 2D superconducting fluctuation -in a weak crapling case -"J. Phys. Soc. Japan. 69.7. 2221-2228 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A.Tsuruta: "Fermi liquid and non -Fermi liquid in Anderson lattice"J. Phys. Soc. Japan. 69.10. 3342-3355 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A.Kobayashi: "Pseudgap induced by superconducting fluctuation and anomalous metals in high-Tc superconducting materials"J. Phys. Chem. Solids. 62. 69-74 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A.Kobayashi: "Pseudgap and Superconducting gap in the d-p model"J. Phys. Chem. Solids. 62. 199-202 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Y.Kosuge: "Theory of quasi-2D superconducting fluctuation"J. Phys. Chem. Solids. 62. 243-247 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Y.Ono: "Mott transition and super-conducting in the two-band Hubbard model in infinite dimensions"J. Phys. Chem. of Solids. 62. 285-288 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A.Tsuruta: "Origin of the tiny antiferromagnetic moment in U Ra_2-Si_2"J. Phys. Chem. of Solids. 62. 297-300 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A.Tsuruta: "Effect of pressure on the tiny antiferromagnetic moment in Uru_2Si_2"J. Phys. Chem. of Solids. 62. 301-304 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M.Watanabe: "Nesting effect for the magnetic transition to the SDW phase in Ce(Ru_1-r Rhr)_2Si_2"J. Phys. Chem. of Solids. 62. 305-308 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Y.Ono: "Phase diagram of the Mott transition in a two band Hubbard model in infinite dimentions"European Physical Journal. B19. 375-385 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A.Kobayashi: "Pseadgap phenomena and phase diagram in the 2-band Hubbard model"J. Phys. Soc. Japan. 70.5. 1214-1217 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A.Kobayashi: "Phase Diagram of the Electron-Doped Cuprate Superconducters"J. Phys. Soc. Japan. 71.7. 1640-1643 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Y.Ohashi: "Critical Behavior near the Mott Transition in a Two-band Hubbard model"J. Phys. Soc. Japan (Supplement). 71,suppl. 217-219 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] K.Sano: "Effective Interactions of the One-Dimensional d-p Model based on the Luttinger Liquid Theory"J. Phys. Soc. Japan (Supplement). 71,suppl. 353-355 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Y.Ono: "Magnetisum and Superconductivity in a Two-band Hubbard Model in Infinite"J. Phys. Soc. Japan (Supplement). 71,suppl. 356-358 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A.Arimoto: "Superconductor-Insulator Transition in the d-p Model"J. Phys. Soc. Japan. 72.4. (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Y.Kosuge: "Comments on Superdonducting Fluctuation and Transport Phenomena in a Quasi-2D Electronic System"J. Phys. Soc. Japan. 72.5. (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A.Kobayashi: "Pseudgap Induced by superconducting fluctuation and anomalous metallic phase in the high-Tc superconducting materials"Physica B. 284&288 part1. 661-662 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] H.Sato: "Critical study on 2D superconducting fluctuation-in a weak crapling case-"J.Phys.Soc.Japan. 69-7. 2221-2228 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A.Tsuruta: "Fermi liquid and non-Fermi liquid in Anderson lattice"J.Phys.Soc.Japan. 69-10. 3342-3355 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A.Kobayashi: "Pseudgap induced by superconducting fluctuation and anomalous metals in high-Tc superconducting materials"J.Phys.Chem.Solids. 62. 69-74 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A.Kobayashi: "Pseudgap and Superconducting gap in the d-p model"J.Phys.Chem.Solids. 62. 199-202 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Y.Kosuge: "Theory of quasi-2D superconducting fluctuation"J.Phys.Chera.Solids. 62. 243-247 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Y.Ono: "Mott transition and super-conducting in the two-band Hubbard model in infinite dimensions"J.Phys.Chera.Solids. 62. 285-288 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A.Tsuruta: "Origin of the tiny antiferromagnetic moment in U Ra_2-Si_2"J.Phys.Chem.Solids. 62. 297-300 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A.Tsuruta: "Effect of pressure on the tiny antiferromagnetic moment in Uru_2 Si_2"J.Phys.Chem.Solids. 62. 301-304 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M.Watanabe: "Nesting effect for the magnetic transition to the SDW phase in Ce (Ru_1-r Rhr)_2 si_2"J.Phys.Chem.Solids. 62. 305-308 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Y.Ono: "Phase diagram of the Mott transition in a two band Hubbad model in infinite dimentions"European Physical Journal. B19. 375-385 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A.Kobayashi: "Pseadgap phenomena and phase diagram in the 2-band Hubbad model"J.Phys.Soc.Japan. 70-5. 1214-1217 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A.Kobayashi, A.Tsuruta, T.Matsuura and Y.Kuroda: "Phase Diagram of the Electron-Doped Cuprate Superconducters"J.Phys.Soc.Japan. 71-7. 1640-1643 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Y.Ohashi and Y.Ono: "Critical Behavior near the Mott Transition in a Two-band Hubbard model"J.Phys.Soc.Japan(Supplement). 71, suppl. 217-219 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] K.Sano and Y.Ono: "Effectie Interactions of the One-Dimensional d-p Model based on the Luttinger Liquid Theory"J.Phys.Soc.Japan(Supplement). 71, suppl. 353-355 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Y.Ono and K.Sano: "Magnetism and Superconductivity in a Two-band Hubbard Model in Infinite"J.Phys.Soc.Japan(Supplement). 71, suppl. 356-358 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T.Arimoto, T.Ohara, A.Tsuruta, A.Kobayashi and Y Kuroda: "Superconductor-Insulator Transition in the d-p Model"J.Phys.Soc.Japan. 72-4. (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Y.Kosuge, A.Kobayashi, T.Matsuura and Y.Kuroda: "Comments on Superconducting Fluctuation and Transport Phenomena in a Quasi-2D Electronic System"J.Phys.Soc.Japan. 72-5. (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] A.Kobayashi: "Phase Diagram of the Electron-Dopecd Cupratc Superconciucters"J.Phys.Soc. Japan. 71,7. 1640-1643 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Y.Ohashi: "Critical Behaviour near the Mott Transition in a Two-band Hubbard Model"J.Phys.Soc. Japan (Supplement). 71,(Suppl). 217-219 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] K.Sano: "Effetive interactions of the One-Dimensional d-p Model based on the Luttinger Liquid Theory"J.Phys.Soc. Japan (Supplement). 71,(Suppl). 353-355 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Y.Ono: "Magnetisum and Superconductivity in a Two-band Hubberd Model in Infinite Dimensions"J.Phys.Soc. Japan (Supplement). 71,(Suppl). 356-358 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] A.Arimoto: "Superconductor-Insulator Transition in the d-p Model"J.Phys.Soc. Japan. 71,4(印刷中). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Y.Kosuge: "Comments on Superconducting Fluctuation and Transport Phenomena in a Quasi-2D Electronic System"J.Phys.Soc. Japan. 72,5(印刷中). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Y. O^^-no: "Mott transition and super-conductinity in the two-band Hubbard model in infinite dimensions"J. Phys. Chem. of Solids. 62. 285-288 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] A. Tsuruta: "Origin of the tiny antiferro magnetic moment in U Ru_2 Si_2"J. Phys. Chem. of Solids. 62. 297-300 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] A. Tsuruta: "Effect of pressure on the tiny antiferro magnetic moment in U Ru_2 Si_2"J. Phys. Chem. of Solids. 62. 301-304 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] M. Watanabe: "Nesting effect for the magnetic transition to the SDW phase in Ce(Ru_<1-x> Rh_x)_2 Si_2"J. Phys. Chem. of Solids. 62. 305-308 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Y. O^^-no: "Phase diagram of the Mott transition in a two band Hubbard model in infinite dimentions"European Physical Journal. B19. 375-385 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] A. Kobayashi: "Pseudogap phenomena and phase diagram in the 2-band Hubbard model"J. Phys. Soc. Japan. 70・5. 1214-1217 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] A.Kobayashi: "Pseudogap induced by superconducting fluctuation and anomalous metallic phase in the high-Tc superconducting materials"Physica B. 284&288. 661 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] H.Sato: "Critical study on 2D superconducting fluctuation-in a weak coapling case-"J.Phys.Soc.Japan. 69・7. 2221 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] A.Tsuruta: "Fermi liquid and non-Fermi liquid in Anderson lattice"J.Phys.Soc.Japan. 69・10. 3342 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] A.Kobayashi: "Pseudogap induced by superconducting fluctuation and anomalous metals in high-Tc superconducting material"J.Phys.Chem.Solids. 62. 69 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] A.Kobayashi: "Pseudogap and superconducting gap in d-p model"J.Phys.Chem.Solids. 62. 199 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] Y.Kosuge: "Theory of quasi-2D superconducting fluctuation"J.Phys.Chem.Solids. 62. 243 (2001)

    • Related Report
      2000 Annual Research Report

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Published: 2000-04-01   Modified: 2020-05-15  

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