ZEEMAN SPLITTINGS OF EXCITONIC TRANSITIONS AT THE GAMMA-POINT IN WURTZITE GAN - A MAGNETOREFLECTANCE INVESTIGATION

Authors
CAMPO J JULIER M COQUILLAT D LASCARAY JP SCALBERT D BRIOT O
Citation
J. Campo et al., ZEEMAN SPLITTINGS OF EXCITONIC TRANSITIONS AT THE GAMMA-POINT IN WURTZITE GAN - A MAGNETOREFLECTANCE INVESTIGATION, Physical review. B, Condensed matter, 56(12), 1997, pp. 7108-7111
Citations number
17
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
56
Issue
12
Year of publication
1997
Pages
7108 - 7111
Database
ISI
SICI code
0163-1829(1997)56:12<7108:ZSOETA>2.0.ZU;2-T
Abstract
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 tech nique allows us to determine the Zeeman splittings to be about 0.05 me V/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 dis persion of the excitonic energies and are in excellent agreement with previously proposed band-edge models.