Transport properties of two laterally coupled vertical quantum dots in series with tunable interdot coupling

T. Hatano, S. Amaha, T. Kubo, S. Teraoka, Y. Tokura, J. A. Gupta, D. G. Austing, S. Tarucha

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number062108
JournalApplied Physics Letters
Volume97
Issue number6
DOIs
Publication statusPublished - 2010 Aug 9

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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