High frequency conductivity in the quantum Hall regime

Frank Hohls, U. Zeitler & Rolf J. Haug
The frequency dependence of the longitudinal conductivity σxx for frequencies up to 6 GHz was measured. It was possible to access both the real part and the imaginary part of σxx which allowed to perform a new test of scaling behavior. Using the theory of Polyakov and Shklovskii on variable-range hopping in the QHE, the localization length was deduced.
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