--------------------
- Zeeman splittings of excitonic transitions at the Gamma point in wurtzite GaN: A magnetoreflectance investigation hal link

Auteur(s): Campo J., Julier M., Coquillat D., Lascaray Jean-paul, Scalbert D., Briot O.

(Article) Publié: Physical Review B, vol. 56 p.R7108-R7111 (1997)


Ref HAL: hal-00546200_v1
Exporter : BibTex | endNote
Résumé:

Wurtzite GaN on (0001) sapphire is studied by means of reflectance and magnetocircular dichroism up to 5.5 T at 2 K. This very powerful technique allows us to determine the Zeeman splittings to be about 0.05 meV/T for the X-A and X-C excitons and almost zero for the X-B exciton. Reflectance and dichroism are interpreted with a model of Gaussian dispersion of the excitonic energies and are in excellent agreement with previously proposed band-edge models.