Abstract
We study the photoluminescence spectrum of a low density (ν < 1) two-dimensional electron gas at high magnetic fields and low temperatures. We find that the spectrum in the fractional quantum Hall regime can be understood in terms of singlet and triplet charged-excitons. We identify the dark triplet charged-exciton and show that it is visible in the spectrum at T < 2 K. We find that its binding energy scales like e2/l, where l is the magnetic length, and it crosses the singlet slightly above 15 T.
Original language | English |
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Pages (from-to) | 49-54 |
Number of pages | 6 |
Journal | Physica E: Low-Dimensional Systems and Nanostructures |
Volume | 12 |
Issue number | 1-4 |
DOIs | |
Publication status | Published - 2002 Jan |
Externally published | Yes |
Event | 14th International Conference on the - Prague, Czech Republic Duration: 2001 Jul 30 → 2001 Aug 3 |
Keywords
- Charged-exciton
- Fractional quantum Hall effect
- Photoluminescence
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Condensed Matter Physics