“Small” Masses and Strong Coupling in High-Tc Superconductors and in Heavy-Fermion Compounds

  • G. M. Eliashberg
Conference paper
Part of the Springer Series in Solid-State Sciences book series (SSSOL, volume 113)


Competition between short-ranged correlations and the Luttinger sum rule lead to a peculiar duality of the electron spectrum: two different effective masses have to be attributed to the same Fermi excitation. One of them corresponds to the band width measured by photoemission spectroscopy, the other may be much smaller in the highly correlated system. The residual Coulomb repulsion between excitations is reduced, and this, probably, has a direct relation to the high-T c problem. A phenomenological description of these phenomena in the framework of Fermi-liquid theory is discussed in connection with high-T c superconductivity and heavy-fermion physics.


Fermi Surface Hubbard Model Charge Fluctuation Fermi Excitation Fermi Spectrum 
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Copyright information

© Springer-Verlag Berlin, Heidelberg 1993

Authors and Affiliations

  • G. M. Eliashberg
    • 1
  1. 1.L.D. Landau Institute for Theoretical PhysicsChernogolovka, Moscow RegionRussia

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