2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/156258Puzzling disagreement between photoemission and optical findings in magnetically doped GaN and ZnO is explained within a generalized alloy theory. The obtained results show that the strong coupling between valence-band holes and localized spins gives rise to a mid-gap Zhang-Rice-like state, to a sign reversal of the apparent p-d exchange integral, and to an increase of the band-gap with the magnetic ion concentration.5 pages, 3 figuresOther Condensed MatterDisordered Systems and Neural NetworksMaterials Sciencetext