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Magnetotransport measurements on overgrown cleaved edge heterostructures in Hall bar geometry

Lermer, Markus ; Reinwald, Elisabeth ; Wegscheider, Werner ; Weiss, Dieter
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Date of publication of this fulltext: 05 Aug 2009 13:33


Abstract We present new methods to pattern and characterize the overgrown cleaved egde (CE) of GaAs/AlGaAs heterostructures. Four point measurements, which allow a direct measurement of the magnetotransport coefficients rxx and rxy of a two- dimensional electron system on the CE, have been out of reach so far. By means of novel preparation techniques a contacted Hall bar structure can be ...


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