A self‐consistent cluster study of the Emery model
作者:
Claudius Gros,
Roser Valentí,
期刊:
Annalen der Physik
(WILEY Available online 1994)
卷期:
Volume 506,
issue 6
页码: 460-466
ISSN:0003-3804
年代: 1994
DOI:10.1002/andp.19945060604
出版商: WILEY‐VCH Verlag
关键词: Emery model;Fermi surface;Cluster expansion;Self energy
数据来源: WILEY
摘要:
AbstractWe 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 recen
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