Near band-edge optical properties of cubic GaN with and without carbon doping. - J. R. L. Fernandez; Fernando Cerdeira; Eliermes Arraes Meneses; Júlio Antônio Nieri de Toledo Soares; Odille Cue Noriega; José Roberto Leite; Donat Josef As; U. Köhler; D. G. P. Salazar; D. Schikora (Microelectron. J., 2004)