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Instability of the QHE induced by a nearby two-dimensional-electron system

Jörger, C. ; Wegscheider, Werner ; Dietsche, W. ; Klitzing, Klaus von
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Date of publication of this fulltext: 09 Nov 2009 13:25


Abstract

We report on the observation of structures in the longitudinal resistance of a single two-dimensional electron gas (2DEG) in a perpendicular magnetic field at filling factor νcongruent with1±0.1. The observed structures can be switched off by depleting a second 2DEG, which is separated from the first by a 30 nm or a 60 nm AlGaAs-barrier, using a gate-electrode. Measurements as a function of ...

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