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29 March 2024
 
  » arxiv » cond-mat/0606750

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Determining the underlying Fermi surface of strongly correlated superconductors
Claudius Gros ; Bernhard Edegger ; V.N. Muthukumar ; P.W. Anderson ; PostScript ; PDF ; Other formats ;
Date 29 Jun 2006
Subject Superconductivity; Strongly Correlated Electrons
AbstractThe notion of a Fermi surface (FS) is one of the most ingenious concepts developed by solid state physicists during the past century. It plays a central role in our understanding of interacting electron systems. Extraordinary efforts have been undertaken, both by experiment and by theory, to reveal the FS of the high temperature superconductors (HTSC), the most prominent strongly correlated superconductors. Here, we discuss some of the prevalent methods used to determine the FS and show that they lead generally to erroneous results close to half filling and at low temperatures, due to the large superconducting gap (pseudogap) below (above) the superconducting transition temperature. Our findings provide a perspective on the interplay between strong correlations and superconductivity and highlight the importance of strong coupling theories for the characterization as well as the determination of the underlying FS in ARPES experiments.
Source arXiv, cond-mat/0606750
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