Abstract
Exchange enhancements of the spin-polarized 2D electron gas are determined for the first time by inelastic light scattering from spin-flip inter-Landau-level and intersubband excitations. In the magnetic quantum limit ν=1 the splitting between long wavelength magnetoplasmons and spin-flip inter-Landau-level excitations is a direct spectroscopic measurement of the enhanced exchange energy. At ν=1 the enhancements in GaAs quantum wells are in agreement with the Hartree-Fock approximation.
- Received 13 February 1992
DOI:https://doi.org/10.1103/PhysRevLett.68.3623
©1992 American Physical Society