Renormalization group analysis of electrons near a Van Hove singularity.
J. Gonzalez, F. Guinea, M. A. H. Vozmediano
Abstract
A model of interacting two dimensional electrons near a Van Hove singularity is studied, using renormalization group techniques. In hole doped systems, the chemical potential is found to be pinned near the singularity, when the electron-electron interactions are repulsive. The RG treatment of the leading divergences appearing in perturbation theory give rise to marginal behavior and anisotropic superconductivity.
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