Compton profiles of NiO and TiO2 obtained from first principles GWA spectral function
Khidzir S M†, , Halid M F M, Wan Abdullah W A T
       

GWA momentum densities (in units of e/a.u.) along the given directions and the locations of the Fermi break (vertical lines) as given in Table 1. NiO (b) momentum density shows significantly more broadening than TiO2 (a) above and below the Fermi break on the x axis (in units of a.u.).