Origin of the electron disproportionation in the metallic sodium cobaltates

Y. V. Lysogorskiy, S. A. Krivenko, I. R. Mukhamedshin +3

Recently the unusual metallic state with a substantially non-uniform distribution of a charge and mag\-ne\-tic density in CoO${}_2$ planes was found experimentally in the Na${}_x$CoO$_…