Fig. 3

NIXS spectra at the Co \({M}_{1}\) edge. An array of spectra were recorded by rotating the sample in 7.5° increments such that \({\bf{q}}\) remained in the [110] to [001] crystallographic plane. The integrated intensity of the peaks is directly proportional to the hole density of the Co \(d\)-electrons in the direction of the momentum transfer \({\bf{q}}\). The color coding is such that the darkest blue curves are spectra taken with \({\bf{q}}\) parallel to high symmetry directions of the single crystal Ca\({}_{3}\)Co\({}_{2}\)O\({}_{6}\).