A self-consistent cluster study of the Emery model

Authors


  • * email: UPH301 and UPH084 at DDOHRZ11.

Abstract

We calculate Fermi-surface properties of the Cuprate superconductors within the three band Hubbard model (also called the Emery model) using a cluster expansion for the proper selfenergy. The Fermi-surface topology is in agreement with angular-resolved photoemission data for dopings ∼ 20%. We discuss possible violations of the Luttinger sum-rule for smaller dopings and the role of van-Hove singularities in the density of states of the Zhang-Rice singlets. We calculate the shift in the chemical potential upon doping and find quantitative agreement with recent experiments.

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