Itinerant and high-energy localized single-particle spectra in large-U$_d$ high-Tc cuprates
O. S. Barišić,
S. Barišić
Abstract:A theory of the underlying metallic state of large-U d high-T c cuprates is presented starting from the covalent Cu-2O 3-band model associated with a sufficiently small copper occupancy. U d = ∞ is dealt by the slave fermion approach. Diagrammatic low order NCA theory in terms of the Cu-O hopping is supplemented with two independent slave particle chemical potentials which implement the U(1) local gauge invariance "at average", thus avoiding the mean-field approximations. The resulting hole spectra consist of … Show more
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