Strong-Field Density of States in Weakly Disordered Two-Dimensional Electron Systems
- 8 August 1988
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 61 (6) , 738-741
- https://doi.org/10.1103/physrevlett.61.738
Abstract
The density of states of a two-dimensional electron gas is calculated in the weak-disorder limit by taking into account self-consistent screening and Landau-level coupling effects. The resultant density of states is broad with considerable overlap between Landau levels, being strikingly different from the well-separated sharp levels of the standard short-range impurity-scattering model. In qualitative agreement with a number of recent experimental findings, calculated level broadenings are much larger than that implied by the zero-field mobility.Keywords
This publication has 22 references indexed in Scilit:
- Landau-level broadening and scattering time in modulation doped GaAs/AlGaAs heterostructuresSurface Science, 1988
- Optical measurements of Landau level density of states and coulomb gaps under FQHE in Si MOSFETSurface Science, 1988
- Cyclotron resonance of high-mobility two-dimensional electrons at extremely low densitiesPhysical Review B, 1988
- Dynamical Conductivity of the GaAs Two-Dimensional Electron Gas at Low Temperature and Carrier DensityPhysical Review Letters, 1987
- Density of states in Landau level tails of GaAsAlxGa1−xAs heterostructuresSurface Science, 1986
- Quantum and classical mobility determination of the dominant scattering mechanism in the two-dimensional electron gas of an AlGaAs/GaAs heterojunctionPhysical Review B, 1985
- Density of States and de Haas—van Alphen Effect in Two-Dimensional Electron SystemsPhysical Review Letters, 1985
- Direct measurement of the density of states of a two-dimensional electron gasPhysical Review B, 1985
- Specific Heat of Two-Dimensional Electrons in GaAs-GaAlAs MultilayersPhysical Review Letters, 1985
- Parabolic Magnetoresistance from the Interaction Effect in a Two-Dimensional Electron GasPhysical Review Letters, 1983