Electron correlations and single-particle physics in the Integer Quantum Hall Effect

Details Electron correlations and single-particle physics in the Integer Quantum Hall Effect Electron correlations and single-particle physics in the Integer Quantum Hall Effect

2005-02-03

arxiv.org/abs/cond-mat/0502095v2

Phys. Rev. Lett. 97, 106801 (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures, replaced with revised version

Scientific paper

10.1103/PhysRevLett.97.106801

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 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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