Effective-field theory for high-$T_c$ cuprates

A. S. Moskvin, Yu. D. Panov

Starting with a minimal model for the CuO${}_2$ planes with the on-site Hilbert space reduced to only three effective valence centers [CuO${}_4$]${}^{7-,6-,5-}$ (nominally Cu$^{1+,2+,3+}…