Form of Scaling Function in Quantum Hall Plateau Transitions
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Abstract
We have measured the temperature dependence of the resistance R xx
and Rxy of a two-dimensional electron system in the regime of the quantum Hall plateau transition. We observe for our sample a considerable large critical exponent k ~ 0.66-0.77, which may be due to the dominant electron-phonon scattering. Further we find a simple exponential form of Rxx=Rcexp (-s) in agreement with the theoretically proposed universal scaling function.
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