Large exchange interactions in the electron gas of GaAs quantum wells
- 9 October 1989
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 63 (15) , 1633-1636
- https://doi.org/10.1103/physrevlett.63.1633
Abstract
Inelastic-light-scattering measurements show that exchange Coulomb interactions in the two-dimensional electron gas of GaAs microstructures are more important than previously anticipated. Small-wave-vector spectra from modulation-doped quantum wells exhibit unexpected single-particle intersubband transitions in addition to collective spin-density and charge-density modes. From the measured spectral energies the direct and exchange intersubband Coulomb interactions are determined and found to be of comparable strengths.Keywords
This publication has 22 references indexed in Scilit:
- Optical Anomalies of the Two-Dimensional Electron Gas in the Extreme Magnetic Quantum LimitPhysical Review Letters, 1988
- Intersubband resonance in quasi one-dimensional inversion channelsPhysical Review Letters, 1987
- Inelastic light scattering by collective charge-density excitations in GaAs-As superlatticesPhysical Review B, 1987
- Inelastic light scattering by electronic excitations in semiconductor heterostructuresIEEE Journal of Quantum Electronics, 1986
- The fractional quantum hall effectIEEE Journal of Quantum Electronics, 1986
- Light Scattering by Electronic Excitations inn-Type GaAs-AlxGa1-xAs SuperlatticesJournal of the Physics Society Japan, 1985
- Theory of collective excitations in semiconductor superlattice structuresPhysical Review B, 1984
- Self-Consistent Results for a GaAs/AlxGa1-xAs Heterojunction. I. Subband Structure and Light-Scattering SpectraJournal of the Physics Society Japan, 1982
- Electronic properties of two-dimensional systemsReviews of Modern Physics, 1982
- Inelastic light scattering by charge carrier excitations in two-dimensional plasmas: Theoretical considerationsSurface Science, 1980