An organizing principle for two-dimensional strongly correlated superconductivity

作者：Fratino L; Semon P; Sordi G; Tremblay A M S

来源：Scientific Reports, 2016, 6(1): 22715.

DOI：10.1038/srep22715

Superconductivity in the cuprates exhibits many unusual features. We study the two-dimensional Hubbard model with plaquette dynamical mean-field theory to address these unusual features and relate them to other normal-state phenomena, such as the pseudogap. Previous studies with this method found that upon doping the Mott insulator at low temperature a pseudogap phase appears. The low-temperature transition between that phase and the correlated metal at higher doping is first-order. A series of crossovers emerge along the Widom line extension of that first-order transition in the supercritical region. Here we show that the highly asymmetric dome of the dynamical mean-field superconducting transition temperature T-c(d), the maximum of the condensation energy as a function of doping, the correlation between maximum T-c(D) and normal-state scattering rate, the change from potential-energy driven to kinetic-energy driven pairing mechanisms can all be understood as remnants of the normal state first-order transition and its associated crossovers that also act as an organizing principle for the superconducting state.

• 出版日期2016-3-11