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- W2013089288 abstract "Recently, we have reported the observation of nonlocal resistance in the regime of the fractional quantum Hall effect (FQHE) that clearly demonstrates edge-state conduction over macroscopic distances. In this paper we present measurements of nonlocal resistance with variations of sample geometry, magnetic-field direction, temperature, and applied current. From our results we formulate a picture of transport in the FQHE regime via coexisting edge and bulk states. Scattering of edge currents is largely suppressed over distances of ensuremath{sim}1 mm at low temperatures. Edge currents are partially redistributed into the bulk at Ohmic contacts on the sample periphery. This results in potential drops between Ohmic contacts far from the bulk-only current path, i.e., nonlocal resistances. For analysis of our data, we introduce a FQHE extension of the bulk-edge transport model successfully applied by Szafer et al. in the integer QHE regime. We discuss the current and temperature dependence of the data in terms of temperature-dependent scattering between edge and bulk currents, increasing with increasing current or temperature." @default.
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- W2013089288 date "1992-06-15" @default.
- W2013089288 modified "2023-09-23" @default.
- W2013089288 title "Measurements and modeling of nonlocal resistance in the fractional quantum Hall effect" @default.
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- W2013089288 doi "https://doi.org/10.1103/physrevb.45.13479" @default.
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