The N acceptor in zincblende alloys was investigated by using optical and deep level transient spectroscopy. It was found that the incorporation of Mg led to the formation of an AX-centre. This consisted of a shallow quasi effective-mass state and a deeper strongly relaxed stable state.

Properties of the Nitrogen Acceptor in ZnMgSe Alloys with Varying Mg Concentration. C.Morhain, D.Seghier, B.Vögele, C.O’Donnell, K.A.Prior, B.C.Cavenett, H.P.Gislason: Journal of Crystal Growth, 2000, 214-215, 482-6