Excitons and Trions in Modulation Doped Structures in High Magnetic Fields |
| V. Kochereshko, D. Andronikov, A. Platonov
A.F. Ioffe Physico-Technical Institute RAS, 194021 St. Petersburg, Russia S. Crooker, T. Barrick National High Magnetic Field Laboratory, Los Alamos, New Mexico 87545, USA G. Karczewski Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland and P. Tronc Laboratoire d'Optique, Ecole Supérieure de Physique et Chimie Industrielles, 10 rue Vauquelin, 75005 Paris, France |
| Full Text PDF |
| Received: 10 06 2004 |
| Photoluminescence spectra of modulation-doped CdTe/CdMgTe quantum well structures containing two-dimensional electron gases of low, moderate and high electron concentrations were studied in high magnetic fields up to 45 T. The recombination line of triplet trion state was found in the spectra. A model calculation of photoluminescence spectra in magnetic fields, which takes into account singlet and triplet trion states, was carried out. It was shown that the dark triplet becomes observable in photoluminescence spectra because it becomes the only recombination channel when the formation of the singlet trion state is suppressed by magnetic fields. |
| DOI: 10.12693/APhysPolA.106.319 PACS numbers: 78.55.Et, 71.35.-y, 78.20.Ls, 78.40.Fy |