Correlation effects on the L3VV Auger line shape of Cd1-xMnxTe

The L3VV Auger spectrum of Mn in Cd1-xMnxTe has been measured with the use of soft-x-ray excitation. The partial Mn 3d density of filled states is obtained from the x-ray photoemission spectra of the binary CdTe and its alloy with manganese. Comparison with theoretical density-of-states calculations shows evidence of crystal-field-split multiplets in the final states of the d4 configuration. The quasiatomic analysis of the Auger process indicates that the electrostatic interactions are largely screened in the alloy and that the two holes on Mn are uncorrelated. Consequently the shape of the Auger spectrum is simply given by the self-fold of the one-particle projected density of states. The extra-atomic contribution to the relaxation energy is also considered. The spin-spin exchange splitting of the d electrons is found to be 5.2 eV. © 1987 The American Physical Society.