Crystal-field states in NaCoO2 and in wet cobalt superconductors (NaxCoO2)

Details Crystal-field states in NaCoO2 and in wet cobalt superconductors (NaxCoO2) Crystal-field states in NaCoO2 and in wet cobalt superconductors (NaxCoO2)

2006-02-24

arxiv.org/abs/cond-mat/0602592v1

Acta Physica 5 (2007) 25

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 fig embeded

Scientific paper

We claim that for calculations of the electronic structure of 3d oxides very strong electron correlations have to be taken into account similarly to those assumed in many-electron crystal field approach. For Co3+ ions in NaxCoO2.yH2O there are 15 low lying many-electron states within 0.1 eV as can be obtained in the many-electron CEF approach with taking into account the spin-orbit coupling. We claim, that the used by us Hamiltonian for the trigonal distortion is correct.

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