Fermi-surface properties of the perovskite superconductors Claudius Gros

Details Fermi-surface properties of the perovskite superconductors Claudius Gros Fermi-surface properties of the perovskite superconductors Claudius Gros

1993-12-06

arxiv.org/abs/cond-mat/9312025v2

Physics

Condensed Matter

9 pages REVTEX

Scientific paper

We calculate Fermi-surface properties of the Cuprate superconductors within the three-band Hubbard model using a cluster expansion for the proper self-energy. The Fermi-surface topology is in agreement with angular-resolved photoemission data for dopings $\sim 20\%$. 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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