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The European Physical Journal B

, Volume 61, Issue 4, pp 405–411 | Cite as

Coulomb correlations do not fill the e g hole pockets in Na0.3CoO2

  • A. Liebsch
  • H. Ishida
Solids and Liquids

Abstract.

There exists presently considerable debate over the question whether local Coulomb interactions can explain the absence of the small e g Fermi surface hole pockets in photoemission studies of Na0.3CoO2. By comparing dynamical mean field results for different single particle Hamiltonians and exact diagonalization as well as quantum Monte Carlo treatments, we show that, for realistic values of the Coulomb energy U and Hund exchange J, the e g pockets can be slightly enhanced or reduced compared to band structure predictions, but they do not disappear.

PACS.

71.18.+y Fermi surface: calculations and measurements; effective mass, g factor 71.27.+a Strongly correlated electron systems; heavy fermions 74.70.-b Superconducting materials 

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Copyright information

© EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2008

Authors and Affiliations

  • A. Liebsch
    • 1
  • H. Ishida
    • 2
  1. 1.Institut für FestkörperforschungJülichGermany
  2. 2.College of Humanities and Sciences, Nihon UniversityTokyoJapan

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