Electronic structure and x-ray spectroscopy of Cu2MnAl1–<italic>x</italic>Ga<italic>x</italic>.

We explore the electronic and related properties of Cu₂MnAl_{1–<italic>x</italic>}Ga_{<italic>x</italic>} with a first-principles, relativistic multiscattering Green function approach. We discuss our results in relation to existing experimental data and show that the electron-core hole interaction is essential for the description of the optical spectra especially in describing the X-ray absorption and magnetic circular dichroism spectra at the L_2,3 edges of Cu and Mn. [ABSTRACT FROM AUTHOR]