Effect of Dynamical Coulomb Correlations on the Fermi Surface of Na_0.3CoO_2

Preprint

21 April 2005

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/0412654

Abstract

The t2g quasi-particle spectra of Na_0.3CoO_2 are calculated within the dynamical mean field theory. It is shown that as a result of dynamical Coulomb correlations charge is transfered from the nearly filled e_g' subbands to the a_1g band, thereby reducing orbital polarization among Co t2g states. Dynamical correlations therefore stabilize the small e_g' Fermi surface pockets, in contrast to angle-resolved photoemission data, which do not reveal these pockets.

Keywords

DYNAMICAL COULOMB CORRELATIONS
FERMI SURFACE
POLARIZATION
NA_0.3COO_2
STABILIZE
E_G
T2G

All Related Versions

Version 1, 2004-12-23, ArXiv
Version 2, 2005-04-21, ArXiv
Published version: Physical Review Letters, 94 (19), 196401.

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