The Γ5 and Γ6 free excitons have been identified in GaN from emission measurements. Another emission peak is also observed which we believe to be the longitudinal free exciton. These measurements along with electrical measurements, which show the sample to have very high peak mobility, attest to the high quality of the sample.
Reynolds, D. C.,
Look, D. C.,
Saxler, A. W.,
Park, S. S.,
& Hahn, J. Y.
(2000). Identification of the Gamma(5) and Gamma(6) Free Excitons in GaN. Applied Physics Letters, 77 (18), 2879-2881.
Copyright © 2000, American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Applied Physics Letters 77.18, and may be found at http://apl.aip.org/resource/1/applab/v77/i18/p2879_s1