Itinerant in-plane magnetic fluctuations and many-body correlations in Na${}_x$CoO${}_2$

M. M. Korshunov, I. Eremin, A. Shorikov +3

Based on the {\it ab-initio} band structure for Na${}_x$CoO${}_2$ we derive the single-electron energies and the effective tight-binding description for the $t_{2g}$ bands using projec…