Optics of charged excitons in quantum wells: Free versus donor-bound complexes

Details Optics of charged excitons in quantum wells: Free versus donor-bound complexes Optics of charged excitons in quantum wells: Free versus donor-bound complexes

2006-05-02

arxiv.org/abs/cond-mat/0605071v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

3 pages, 2 figures. To be presented at 14th Int. Symposium "Nanostructures: Physics and Technology", St. Petersburg, Russia, J

Scientific paper

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.

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