2005/02/28 by Alexander Struck, Bernhard Kramer, Bernhard Krämer
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Quantum and electron transport phenomena #Quantum, superfluid, helium dynamics #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.97.106801
published as Phys. Rev. Lett. 97, 106801 (2006) · 4 pages, 2 figures, replaced with revised version
openalex publication_date 2006/09/05 · arxiv created 2006/09/06 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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.