Hot Spots and Pseudogaps for Hole- and Electron-Doped High-Temperature Superconductors

Abstract

Using cluster perturbation theory, it is shown that the spectral weight and pseudogap observed at the Fermi energy in recent Angle Resolved Photoemission Spectroscopy (ARPES) of both electron and hole-doped high-temperature superconductors find their natural explanation within the t-t'-t''-U Hubbard model in two dimensions. The value of the interaction U needed to explain the experiments for electron-doped systems at optimal doping is in the weak to intermediate coupling regime where the t-J model is inappropriate. At strong coupling, short-range correlations suffice to create a pseudogap but at weak coupling long correlation lengths associated with the antiferromagnetic wave vector are necessary.

RevTeX 4, 4 pages, 5 figures (2 in color)

References in corpus (2)

• Cellular Dynamical Mean Field Theory for the 1D Extended Hubbard Model
• Single-Particle Spectrum in the Electron-Doped Cuprates

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