Abstract
The diffusion constant and the diagonal conductivity for non-interacting electrons in a two-dimensional, disordered system are studied. A homogeneous magnetic field perpendicular to the electron system is assumed. For weak short-range random potentials and high fields the Landau quantum numbern can be used as expansion parameter. In the limit of high Landau levels the system shows metallic behaviour. Corrections for finiten decrease the conductivity and indicate localized states in the whole energy band. A breakdown of the expansion and stronger localization are observed only for the lowest Landau levels if the typical experimental length scale of the quantized Hall effect is used.
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Salomon, R. Localization and the integer-quantized Hall effect: Diffusion constant for high Landau levels and white noise potential. Z. Physik B - Condensed Matter 73, 519–527 (1989). https://doi.org/10.1007/BF01319381
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DOI: https://doi.org/10.1007/BF01319381