Transport properties of two laterally coupled vertical quantum dots in series with tunable inter-dot coupling

Details Transport properties of two laterally coupled vertical quantum dots in series with tunable inter-dot coupling Transport properties of two laterally coupled vertical quantum dots in series with tunable inter-dot coupling

2010-07-31

arxiv.org/abs/1008.0071v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

16 pages, 3 figures, accepted for Applied Physics Letters

Scientific paper

We describe the electronic properties of a double dot for which the lateral coupling between the two vertical dots can be controlled in-situ with a center gate voltage (Vc) and the current flows through the two dots in series. When Vc is large and positive, the two dots merge. As Vc is made less positive, two dots are formed whose coupling is reduced. We measure charging diagrams for positive and negative source-drain voltages in the weak coupling regime and observe current rectification due to the Pauli spin blockade when the hyperfine interaction between the electrons and the nuclei is suppressed.

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