Suppressed Coherence due to Orbital Correlations in the Ferromagnetically Ordered Metallic Phase of Mn Compounds

Masatoshi Imada

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Small Drude weight D together with small specific heat coefficient γ observed in the ferromagnetic phase of R1-xAxMnO3 (R=La, Pr, Nd, Sm; A=Ca, Sr, Ba) are analyzed in terms of a proximity effect of the Mott insulator. The scaling theory for the metal-insulator transition with the critical enhancement of orbital correlations toward the staggered ordering of two eg orbitals such as 3x2 - r2 and 3y2 - r2 symmetries may lead to the critical exponents of D ∞ δu and γ ∞ δv with u = 3/2 and v = 0. The result agrees with the experimental indications.

Original languageEnglish
Pages (from-to)45-48
Number of pages4
Journaljournal of the physical society of japan
Issue number1
Publication statusPublished - 1998 Jan



  • Anisotropic hyperscaling
  • Colossal magnetoresistance
  • Incoherent metal
  • LaMnO
  • Metal-insulator transition
  • Mott transition
  • Orbital correlation
  • Orbital order
  • Quantum critical phenomena
  • Scaling theory
  • Specific heat
  • Transition metal oxides

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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