Temperature dependent electronic correlation effects in GdN

We investigate temperature dependent electronic correlation effects in the conduction bands of gadolinium nitride (GdN) based on the combination of many-body analysis of the multi-band Kondo lattice model and the first principles TB-LMTO band- structure calculations. The physical properties like the quasi-particle density of states (Q-DOS), spectral density (SD) and quasi-particle band structure (Q-BS) are calculated and discussed. The results can be compared with spin and angle resolved inverse photoemission spectroscopy (ARIPS) of the conduction bands of GdN. A redshift of 0.34 eV of the lower band edge (T = T-c -> T = 0) is obtained and found to be in close agreement with earlier theoretical prediction and experimental values reported in the literature.