Localization Exponent for the Second Landau Level in the Quantum Hall Effect
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Abstract
At temperature above 1K, we measured the temperature dependence of the longitudinal and Hall resistivity ρxx,ρxy in the regime of the quantum Hall
plateau-to-plateau transitions. The localization exponent v is extracted with an approach based on the variable range hopping theory. We find the quantity v≈2.3 at the second Landau level, which is proven to be accurately universal. -