Two distinct maxima EW and EW′ are observed in the resonant Raman scattering profile for the zone-center longitudinal-optical phonon asymmetric linewidth broadening in GaP1−xNx. EW originates from the X-point conduction-band state perturbed by isolated nitrogen state NX and the nitrogen-nitrogen (NN) pair and cluster states, and EW′ from the effective band-edge states which are comprised of NN pairs and clusters. The study reveals that EW remains stationary with increased nitrogen doping whereas EW′ closely follows the absorption edge.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|State||Published - 27 Jun 2003|