Metal-insulator transitions in cyclotron resonance of periodic nanostructures due to avoided band crossings
L. Hufnagel, M. Weiss, A. Iomin, R. Ketzmerick, S. Fishman, T. Geisel
Abstract
A recently found metal-insulator transition in a model for cyclotron resonance in a two-dimensional periodic potential is investigated by means of spectral properties of the time evolution operator. The previously found dynamical signatures of the transition are explained in terms of avoided band crossings due to the change of the external electric field. The occurrence of a cross-like transport is predicted and numerically confirmed.
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