Electron correlations and single-particle physics in the integer quantum Hall effect |
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Authors: | Struck Alexander Kramer Bernhard |
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Institution: | I. Institut für Theoretische Physik, Universit?t Hamburg, Jungiusstrasse 9, 20355 Hamburg, Germany. |
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Abstract: | The compressibility of a two-dimensional electron system with spin in a spatially correlated random potential and a quantizing magnetic field is investigated. Electron-electron interaction is treated with the Hartree-Fock method. Numerical results for the influences of interaction and disorder on the compressibility as a function of the particle density and the strength of the magnetic field are presented. Localization-delocalization transitions associated with a highly compressible region in the energy spectrum are found at half-integer filling factors. Coulomb blockade effects are found near integer fillings in the regions of low compressibility. Results are compared with recent experiments. |
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