An organizing principle for two-dimensional strongly correlated superconductivity.

Sordi G., Fratino L., S'emon P., Charlebois M., Tremblay A.-M.S.
  Venerdì 15/09   09:00 - 12:00   Aula A224   II - Fisica della materia
The emergence of superconductivity in a doped interaction-driven insulator is one of the most intriguing phenomena in nature. Cuprates offer a prime example. I present results obtained from plaquette cellular dynamical mean-field theory for the two-dimensional Hubbard model and the Emery model. The normal state which is unstable to the superconducting state shows a first-order transition between a pseudogap and a correlated metallic phase. That transition is the finite-doping extension of the metal-insulator transition obtained in the undoped model. This transition serves as an organizing principle for the normal and superconducting states. This mechanism may be a much more general organising principle for strongly coupled matter.