Evolution of Co charge disproportionation with Na order in Na${}_x$CoO${}_2$

I. R. Mukhamedshin, A. V. Dooglav, S. A. Krivenko +1

${}^{59}$Co NMR experiments have been performed on single crystals of the layered cobaltate Na${}_x$CoO${}_2$ with x=0.77 which is an antiferromagnet with Néel temperature $T_N=22$…