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Phase coherence in the cotunneling regime of a coupled double quantum dot

DOI to cite this document:
Sigrist, Martin ; Ihn, Thomas ; Ensslin, Klaus ; Reinwald, Matthias ; Wegscheider, Werner
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Date of publication of this fulltext: 25 Jan 2010 13:31


Low-temperature transport measurements were performed on a two-terminal Aharonov–Bohm interferometer with one Coulomb-blockaded quantum dot (QD) embedded in each of the two interfering paths. Layered local anodic oxidation of the Ga[Al]As heterostructure and a thin titanium top gate give full tunability of the inter-dot tunnel coupling from purely capacitive to the QD molecule regime and of the ...


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