Current carrying states in the lowest Landau level
- 2 March 1992
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 68 (9), 1375-1378
- https://doi.org/10.1103/physrevlett.68.1375
Abstract
We have performed numerical calculations for noninteracting electrons in two dimensions in the high-magnetic-field (lowest-Landau-level) limit in the presence of a random potential. By identifying the first Chern character of each eigenstate, we show directly from the data for sizes varying from scrN=8 flux quanta to scrN=128 that the lowest Landau level has extended eigenstates only at a single energy (the center of the band). The localization length ξ is found to diverage as (E- , with ν=2.4±0.1, in agreement with previous calculations.
Keywords
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