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

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DOIResolve DOI: http://doi.org/10.1103/PhysRevLett.110.016803
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TypeArticle
Journal titlePhysical Review Letters
ISSN0031-9007
Volume110
Issue1
Article number16803
SubjectSequential tunneling; Spin blockade; Triple quantum; Triplet state; Electrons; Magnetic moments; Semiconductor quantum dots; Spin dynamics; Electrospinning
AbstractWe 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. © 2013 American Physical Society.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC)
Peer reviewedYes
NPARC number21270548
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Record identifier9d7c77a0-7b14-4030-87e2-ff569375bcbd
Record created2014-02-17
Record modified2016-05-09
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