Conductance fluctuations at the fractional quantum Hall plateau transitions

Physics – Condensed Matter – Mesoscale and Nanoscale Physics

Scientific paper

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RevTex, 5 pages, 8 figures, 1 table

Scientific paper

10.1103/PhysRevB.58.12605

We obtain a ``mean field'' scaling flow of the longitudinal and the Hall conductivities in the fractional quantum Hall regime. Using the composite fermion picture and assuming that the composite fermions follow the Khmelnitskii-Pruisken scaling flow for the integer quantum Hall effect, the unstable fixed points which govern the transitions between different fractional quantum Hall states are identified. Distributions of the critical longitudinal and Hall conductivities at the unstable fixed points are obtained and implications of the results for the experiments on mesoscopic quantum Hall systems are discussed.

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