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Coupling in concentric double quantum rings

DOI to cite this document:
Mühle, A. ; Wegscheider, Werner ; Haug, R. J.
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Date of publication of this fulltext: 25 Jan 2010 13:55


We designed a device consisting of two concentric quantum rings in a GaAs/AlGaAs heterostructure. The outer ring is connected to leads while the inner ring is only capacitively coupled to the rest of the system. Measuring electronic transport in a regime with strong coupling to the leads we found that the conductivity not only shows an Aharonov-Bohm effect with a periodicity fitting to the ...


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