Localization and interaction in two dimensions: The disordered Tomonaga model


  • Ulrich Fastenrath

    1. Institut für Theoretische Physik, Universität zu Köln, Zülpicher Straße 77, W-5000 Köln 41, Germany
    Current affiliation:
    1. Technische Universität München, Physik Department T 30, James-Franck-Straße, W-8046 Garching, Germany
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The effect of electron-electron interactions on the localization behavior of two-dimensional disordered systems is investigated in the framework of a generalized version of Tomonaga's model. The main result is a closed expression for the dynamical conductivity which allows to predict the critical electron concentration below which localization sets in as a function of microscopic parameters only. Experimental verification is possible, although difficult.