Electron correlation effects on magnetic Compton profiles of nickel in the GW approximation Original Research Article

The magnetic Compton profiles (MCPs) of 3d transition metal nickel are calculated by the GW approximation with FLAPW basis sets on the LSDA. The 3d valence band width narrowing, which is ascribed to the dynamical screening effects, contributes to eliminate an anomalous peak at 0.7 a.u. in the 〈110〉 direction, and also to diminish the excessive estimation of the Umklapp effects, in the LSDA MCPs. These are in good agreement with experimental observation.