Orbital Kondo Effect in $CrO_{2}$: A LSDA+DMFT Study

Details Orbital Kondo Effect in $CrO_{2}$: A LSDA+DMFT Study Orbital Kondo Effect in $CrO_{2}$: A LSDA+DMFT Study

2002-09-05

arxiv.org/abs/cond-mat/0209132v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures, submitted to PRL

Scientific paper

Motivated by a collection of experimental results indicating the strongly correlated nature of the ferromagnetic metallic state of $CrO_{2}$, we present results based on a combination of the actual bandstructure [3] with dynamical mean-field theory (DMFT) for the multi-orbital case. In striking contrast with LSDA(+U) [3] and model many-body approaches [14], much better semiquantitative agreement with (i) recent photoemission results, (ii) domain of applicability of the half-metal concept, and (iii) thermodynamic and dc transport data, is obtained within a single picture. Our approach has broad applications for the detailed first principles investigation of other transition metal oxide-based half-metallic ferromagnets.

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