Abstract
The electron effective mass, , has been determined by magnetophotoluminescence in as-grown and hydrogenated samples for a wide range of nitrogen concentrations (from to ). A modified model, which takes into account hybridization effects between N cluster states and the conduction band edge, reproduces quantitatively the experimental values up to . Experimental and theoretical evidence is provided for the N complexes responsible for the nonmonotonic and initially puzzling compositional dependence of the electron mass.
- Received 12 May 2005
DOI:https://doi.org/10.1103/PhysRevB.73.073201
©2006 American Physical Society