Fermi-surface properties of the perovskite superconductors Claudius Gros

1993/12/06 by Roser Valentí, Valenti, Roser
Materials Science · Physics and Astronomy · #Condensed Matter (cond-mat) #Electronic and Structural Properties of Oxides #FOS: Physical sciences #Magnetic and transport properties of perovskites and related materials #Physics of Superconductivity and Magnetism

paper · pdf · doi:10.48550/arxiv.cond-mat/9312025

openalex publication_date 1993/12/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

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 ∼ 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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