Superlattices were doped with N, from a direct-current plasma source, during growth via molecular beam epitaxy. The samples were investigated by using photoluminescence, double-crystal X-ray diffraction, and secondary ion mass spectroscopic techniques. It was found that very marked intermixing across the quantum-well interfaces occurred and produced an homogeneous alloy. The mixing was attributed to cation diffusion which was assisted by lattice defects which were produced by the simultaneous presence of Mg and N atoms.

T.Baron, F.Kany, K.Saminadayar, N.Magnea, R.T.Cox: Applied Physics Letters, 1997, 70[22], 2963-5