Journal Article

PreJuSER-2332

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Coulomb correlations do not fill the e'_g hole pockets in Na_{0.3}CoO_2

Liebsch, A.FZJ* ; Ishida, H.

2008
Springer Berlin

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Please use a persistent id in citations: doi:10.1140/epjb/e2008-00108-y

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.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Quanten-Theorie der Materialien (IFF-1)

Research Program(s):

1. Kondensierte Materie (P54)

Appears in the scientific report 2008

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