Optics of charged excitons in quantum wells: Free versus donor-bound complexes
Mesoscale and Nanoscale Physics
2007-05-23 v1 Materials Science
Abstract
We theoretically study localization of quasi-two-dimensional negatively charged excitons X^- on isolated charged donors in magnetic fields. We consider donors located in a barrier at various distances L from the heteroboundary as well as donors in the quantum well. We establish how many different singlet X_s^- and triplet X_t^- bound states a donor ion D^+ can support in magnetic fields B > 6 T. We find several new bound states, some of which have surprisingly large oscillator strengths.
Keywords
Cite
@article{arxiv.cond-mat/0605071,
title = {Optics of charged excitons in quantum wells: Free versus donor-bound complexes},
author = {A. B. Dzyubenko and D. A. Cosma and T. D. Kelly and A. R. Todd and A. Yu. Sivachenko},
journal= {arXiv preprint arXiv:cond-mat/0605071},
year = {2007}
}
Comments
3 pages, 2 figures. To be presented at 14th Int. Symposium "Nanostructures: Physics and Technology", St. Petersburg, Russia, June 26-30, 2006