Antilocalization in a 2D electron gas in a random magnetic field |
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Authors: | Taras-Semchuk Efetov |
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Affiliation: | Theoretische Physik III, Ruhr-Universitat Bochum, Universitatsstrasse 150, 44780 Bochum, Germany. |
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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 in addition 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. |
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