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Fano effect in a quantum-ring–quantum-dot system with tunable coupling

DOI to cite this document:
10.5283/epub.12622
Fuhrer, A. ; Brusheim, P. ; Ihn, T. ; Sigrist, Martin ; Ensslin, Klaus ; Wegscheider, Werner ; Bichler, Max
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Date of publication of this fulltext: 02 Mar 2010 14:02


Abstract

Transport measurements are presented on a quantum ring that is tunnel-coupled to a quantum dot. When the dot is in the Coulomb blockade regime, but strongly coupled to the open ring, Fano line shapes are observed in the current through the ring, when the electron number in the dot changes by 1. The symmetry of the Fano resonances is found to depend on the magnetic flux penetrating the area of the ...

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