ANISOTROPIC FERMI SURFACES AND KOHN–LUTTINGER SUPERCONDUCTIVITY IN TWO DIMENSIONS

@article{Gonzlez1999ANISOTROPICFS,
  title={ANISOTROPIC FERMI SURFACES AND KOHN–LUTTINGER SUPERCONDUCTIVITY IN TWO DIMENSIONS},
  author={J W Gonz{\'a}lez and Francisco Guinea and Mar'ia A. H. Vozmediano},
  journal={International Journal of Modern Physics B},
  year={1999},
  volume={13},
  pages={2545-2572}
}
The instabilities induced on a two-dimensional system of correlated electrons by the anisotropies of its Fermi line are analyzed on general grounds. Simple scaling arguments allow to predict the opening of a superconducting gap with a well-defined symmetry prescribed by the geometry of the Fermi line. The same arguments predict a critical dimension of 3/2 for the transition of the two-dimensional system to non-Fermi liquid behavior. The methods are applied to the t–t′ Hubbard model in a wide… Expand
1 Citations
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