Two- and three-electron pauli spin blockade in series-coupled triple quantum dots

S. Amaha, W. Izumida, Tsuyoshi Hatano, S. Teraoka, S. Tarucha, J. A. Gupta, D. G. Austing

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37 Citations (Scopus)

Abstract

We investigate two- and three-electron spin blockade in three vertical quantum dots (QDs) coupled in series. Two-electron spin blockade is found in a region where sequential tunneling through all QDs is forbidden but tunneling involving virtual hopping through an empty QD is allowed. It is observed only for the hole cycle with a distinct bias threshold for access to the triplet state. Three-electron spin blockade involving the quadruplet state is observed for nonequibilium conditions where sequential tunneling is allowed and the triplet state is accessible. Our results shine light on the importance of the nonequibilium conditions to obtain sufficient population of triplet and quadruplet states necessary for spin blockade.

Original languageEnglish
Article number016803
JournalPhysical Review Letters
Volume110
Issue number1
DOIs
Publication statusPublished - 2013 Jan 2

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Amaha, S., Izumida, W., Hatano, T., Teraoka, S., Tarucha, S., Gupta, J. A., & Austing, D. G. (2013). Two- and three-electron pauli spin blockade in series-coupled triple quantum dots. Physical Review Letters, 110(1), [016803]. https://doi.org/10.1103/PhysRevLett.110.016803