Role of electronic correlations in the Fermi surface formation of NaxCoO2

A. Shorikov, M. M. Korshunov, V. I. Anisimov

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Band structure of metallic sodium cobaltate NaxCoO2 (x = 0.33, 0.8, 0.61, 0.72) has been investigated by local density approximation + Hubbard U (LDA+U) method and within Gutzwiller approximation for the Co-t2g manifold. Correlation effects being taken into account results in suppression of the e′g hole pockets at the Fermi surface in agreement with recent angle-resolved photoemission spectroscopy (ARPES) experiments. In the Gutzwiller approximation the bilayer splitting is significantly reduced due to the correlation effects. The formation of high spin (HS) state in Co d-shell was shown to be very improbable.

Original languageEnglish
Pages (from-to)80-85
Number of pages6
JournalJETP Letters
Volume93
Issue number2
DOIs
Publication statusPublished - Mar 2011
Externally publishedYes

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