Delocalization for Random Landau Hamiltonians with Unbounded Random Variables

Details Delocalization for Random Landau Hamiltonians with Unbounded Random Variables Delocalization for Random Landau Hamiltonians with Unbounded Random Variables

2009-02-25

arxiv.org/abs/0902.4300v1

Physics

Mathematical Physics

Scientific paper

In this note we prove the existence of a localization/delocalization transition for Landau Hamiltonians randomly perturbed by an electric potential with unbounded amplitude. In particular, with probability one, no Landau gaps survive as the random potential is turned on, the gaps close, filling up partly with localized states. A minimal rate of transport is exhibited in the region of delocalization. To do so, we exploit the a priori quantization of the Hall conductance and extend recent Wegner estimates to the case of unbounded random variables.

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