Publication at Faculty of Mathematics and Physics |
2010
Abstract
Polarization-resolved magnetoluminescence, together with simultaneous magnetotransport measurements, have been performed on a two-dimensional electron gas (2DEG) confined in CdTe quantum well in order to determine the spin splitting of fully occupied electronic Landau levels, as a function of the magnetic field (arbitrary Landau-level filling factors) and temperature. The spin splitting, extracted from the energy separation of the $\sigma^+$ and $\sigma^−$ transitions, is composed of the ordinary Zeeman term and a many-body contribution which is shown to be driven by the spin polarization of the 2DEG.
It is argued that both these contributions result in a simple, rigid shift of Landau-level ladders with opposite spins.