Abstract
We report on a spectroscopic study of the lowest-energy electron-hole transitions of the two-dimensional electron gas (2DEG), with a density varied by photoexcitation in GaAs/(Formula presented)(Formula presented)As quantum wells and under a perpendicularly applied magnetic field B. The transition into the phase consisting of a charged exciton singlet ((Formula presented)) ground state and neutral exciton (X) excited state occurs at a filling factor ν=1. The relative intensities of the (Formula presented) and X transitions measured by photoluminescence excitation at T=2 K, as a function of ν≤1 and of B, are shown to depend on the relative area occupied by the magnetic-field-localized 2DEG and on the reduced orbit of the additional electron bound to (Formula presented).
Original language | English (US) |
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Pages (from-to) | 10320-10323 |
Number of pages | 4 |
Journal | Physical Review B - Condensed Matter and Materials Physics |
Volume | 54 |
Issue number | 15 |
DOIs | |
State | Published - 1996 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics