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Phys Rev Lett. 2004 Nov 5;93(19):196801. Epub 2004 Nov 1.

Observation of an interedge magnetoplasmon mode in a degenerate two-dimensional electron gas.

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  • 1Institut für Festkörperphysik, Universität Hannover, Appelstrasse 2, D-30167 Hannover, Germany. sukhodub@nano.uni-hannoiver.de

Abstract

We study the propagation of edge magnetoplasmons by time-resolved current measurements in a sample which allows for selective detection of edge states in the quantum Hall regime. At filling factors close to nu=3 we observe two decoupled modes of edge excitations, one of which is related to the innermost compressible strip and is identified as an interedge magnetoplasmon mode. From the analysis of the propagation velocities of each mode the internal spatial parameters of the edge structure are derived.

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