Physics – Condensed Matter
Scientific paper
2001-01-05
Physics
Condensed Matter
Scientific paper
10.1103/PhysRevB.63.245319
A re-ordered valence band in GaN/AlGaN quantum wells with respect to GaN epilayers has been found as a result of the observation of an enhanced g-factor in magneto-luminescence spectra in fields up to 55 T. This has been caused by a reversal of the states in the strained AlGaN barriers thus giving different barrier heights for the different quantum well hole states. From k.p calculations in the quasi-cubic approximation, a change in the valence-band ordering will account for the observed values for the g-factors. We have also observed the well-width dependence of the in-plane extent of the excitonic wavefunction from which we infer an increase in the exciton binding energy with the reduction of the well width in general agreement with theoretical calculations of Bigenwald et al (phys. stat. sol. (b) 216, 371 (1999)) that uses a variational approach in the envelope function formalism that includes the effect of the electric field in the wells.
Grandjean N.
Massies J.
Nicholas Jack R.
Shields P. A.
No associations
LandOfFree
Magneto-photoluminescence of GaN/AlGaN quantum wells: valence band reordering and excitonic binding energies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Magneto-photoluminescence of GaN/AlGaN quantum wells: valence band reordering and excitonic binding energies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magneto-photoluminescence of GaN/AlGaN quantum wells: valence band reordering and excitonic binding energies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-120036