Localization of particles in a two-dimensional random potential |
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Authors: | W Götze P Prelovšek P Wölfle |
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Institution: | Physik Department der Technischen Universität München and Max Planck Institut für Physik, München, Germany |
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Abstract: | A recently proposed theory of the density response of particles moving in a random potential is applied to two-dimensional systems. The particles are found to be localized for arbitrary small disorder. By decreasing the potential fluctuations we find an abrupt transition from an insulating state to a quasi-conducting state exhibiting exceedingly small values for the inverse susceptibility, the inverse localization length and the excitation gap of the dynamical conductivity. |
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