Antilocalization in a 2D Electron Gas in a Random Magnetic Field

Abstract

We construct a supersymmetric field theory for the problem of a two-dimensional electron gas in a random, static magnetic field. We find a new term in the free energy, additional to those present in the conventional unitary sigma-model, whose presence relies on the long-range nature of the disorder correlations. Under a perturbative renormalization group analysis of the free energy, the new term contributes to the scaling function at one-loop order and leads to antilocalization.

4 pages, RevTeX

References in corpus (1)

• Effective Field Theory of the Random Flux Model

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