P. Augustinsky, V. Krapek, J. Kunes
The hole and electron doped LaCoO$_3$ is studied using the dynamical mean-field theory. The one-particle spectra are analyzed and compared to the available experimental data, in particular the x-ray absorption spectra. Analyzing the temporal spin-spin correlation functions we find the atomic intermediate spin state is not important for the observed Curie-Weiss susceptibility. Contrary to commonly held view about the roles played by the $t_{2g}$ and $e_g$ electrons we find narrow quasi-particle bands of $t_{2g}$ character crossing the Fermi level accompanied by strongly damped $e_g$ excitations.
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http://arxiv.org/abs/1302.4925
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