Doping and temperature evolution of pseudogap and spin-spin correlations in the two-dimensional Hubbard model

Valerii Kuz'min, Maxim Visotin, Sergey Nikolaev +1

Cluster perturbation theory is applied to the two-dimensional Hubbard $t-t^{\prime }-t^{\prime \prime }-U$ model to obtain doping and temperature dependent electronic spectral function with $4\times 4$ a…