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VOLUME 82 | ISSUE 8 | PAGE 598
Experimental investigation of the edge states structure at fractional filling factors
E. V. Deviatov, V. T. Dolgopolov, A. Lorke+, W. Wegscheider*, A. D. Wieck^\triangle

Institute of Solid State Physics RAS, Chernogolovka, Moscow District 142432, Russia
+Laboratorium für Festkörperphysik, Universität Duisburg-Essen, Lotharstr. 1, D-47048 Duisburg, Germany
*Institut für Angewandte und Experimentelle Physik, Universitat Regensburg, 93040 Regensburg, Germany
^\triangleLehrstuhl für Angewandte Festkörperphysik, Ruhr-Universität Bochum, Universitätsstrasse 150, D-44780 Bochum, Germany

PACS: 71.30.+h, 73.40.Qv
Abstract
We experimentally study electron transport between edge states in the fractional quantum Hall effect regime. We find an anomalous increase of the transport across the 2/3 incompressible fractional stripe in comparison with theoretical predictions for the smooth edge potential profile. We interpret our results as a first experimental demonstration of the intrinsic structure of the incompressible stripes arising at the sample edge in the fractional quantum Hall effect regime.


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