Spin blockade and co-tunneling in a double quantum dot

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Proceedings titleBulletin of the American Physical Society: March Meeting 2004
ConferenceAmerican Physical Society, March Meeting 2004, 22-26 March 2004, Montreal, Quebec, Canada
AbstractWe report on co-tunneling measurements of a few electron lateral double quantum dot device connected in series to spin-polarized leads. A state of only one of the two dots is aligned at resonance with the leads. At this operation point, current can only flow via virtual transitions (co-tunneling events) in the Coulomb blockaded dot. We present the magnetic field dependence of the co-tunneling current and compare it with the Coulomb blockade peaks of the individual dots in the equivalent occupation number and field regime. We find that the resonant dot acts as a `spin valve' for the co-tunneling transport as well as an electrometer sensitive to charge redistribution in the blockaded dot.
Publication date
AffiliationNational Research Council Canada; NRC Institute for Microstructural Sciences
Peer reviewedNo
NPARC number12441154
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Record identifier2273a678-dc2a-4b8f-b9e3-d311e67cfe38
Record created2009-09-25
Record modified2016-05-09
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