^{59}Co NMR evidence for charge ordering below T_{CO}\sim 51 K in Na_{0.5}CoO_2

F. L. Ning, S. M. Golin, K. Ahilan +3

The CoO${}_2$ layers in sodium-cobaltates Na${}_x$CoO${}_2$ may be viewed as a spin $S=1/2$ triangular-lattice doped with charge carriers. The underlying physics of the cobaltates…