Superconducting phase diagram of the paramagnetic one-band Hubbard model
  We study spin-fluctuation-mediated superconductivity in the one-band Hubbard model. Higher order effective interactions in $U$ give rise to a superconducting instability which is very sensitive to changes in the Fermi surface topology arising as a function of doping and changes in the band structure. We show the superconducting phase diagram as a function of doping and next-nearest neighbor hopping in the limit of very small Coulomb interaction strength and discuss peculiarities arising at the phase boundaries separating different superconducting domains. 
Andreas Kreisel and Astrid T. Roemer and Peter J. Hirschfeld and Brian   M. Andersen
cond-mat.supr-con