Hartree-Fock interactions in the integer quantum Hall effect
Autor: | Christoph Sohrmann, Rudolf A. Römer |
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Rok vydání: | 2008 |
Předmět: |
Physics
Local density of states Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics Hartree–Fock method FOS: Physical sciences Disordered Systems and Neural Networks (cond-mat.dis-nn) Condensed Matter - Disordered Systems and Neural Networks Conductivity Quantum Hall effect Condensed Matter Physics Electronic Optical and Magnetic Materials Magnetic field Kubo formula Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Compressibility Integer (computer science) |
Zdroj: | physica status solidi (b). 245:336-343 |
ISSN: | 1521-3951 0370-1972 |
Popis: | We report on numerical studies into the interplay of disorder and electron-electron interactions within the integer quantum Hall regime, where the presence of a strong magnetic field and two-dimensional confinement of the electronic system profoundly affects thermodynamic and transport properties. We emphasise the behaviour of the electronic compressibility, the local density of states, and the Kubo conductivity. Our treatment of the electron-electron interactions relies on the Hartree-Fock approximation so as to achieve system sizes comparable to experimental situations. Our results clearly exhibit manifestations of various interaction-mediated features, such as non-linear screening, local charging, and g-factor enhancement, implying the inadequacy of independent-particle models for comparison with experimental results. Comment: 13 Wiley-VCH LaTeX pages with 8 figures, style files included |
Databáze: | OpenAIRE |
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