Inelastic transitions and counterflow tunneling in double-dot quantum ratchets

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buir.contributor.orcidTanatar, Bilal|0000-0002-5246-0119en_US
dc.citation.epage205312-7en_US
dc.citation.issueNumber20en_US
dc.citation.spage205312-1en_US
dc.citation.volumeNumber82en_US
dc.contributor.authorMoldoveanu, V.en_US
dc.contributor.authorTanatar, Bilalen_US
dc.contributor.bilkentauthorTanatar, Bilal
dc.date.accessioned2016-02-08T09:56:03Z
dc.date.available2016-02-08T09:56:03Z
dc.date.issued2010en_US
dc.departmentNanotechnology Research Center (NANOTAM)en_US
dc.departmentDepartment of Physicsen_US
dc.description.abstractThe ratchet regime of unbiased double quantum dots driven out of equilibrium by an independently biased nearby detector has been theoretically studied using the nonequilibrium Keldysh formalism and the random-phase approximation for the Coulomb effects. When the detector is suitably biased the energy exchange between the two systems removes the Coulomb blockade on the double dot via inelastic interdot tunneling. The energy detuning determines whether the current flows in the same direction as the driving current (positive flow) or in the opposite direction (electronic counterflow). In both cases the intradot transitions lead to negative-differential conductance. Besides the ratchet contribution to the current we also single out a Coulomb drag component.en_US
dc.identifier.doi10.1103/PhysRevB.82.205312en_US
dc.identifier.issn1098-0121
dc.identifier.urihttp://hdl.handle.net/11693/22139
dc.language.isoEnglishen_US
dc.publisherThe American Physical Societyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1103/PhysRevB.82.205312en_US
dc.source.titlePhysical Review B - Condensed Matter and Materials Physicsen_US
dc.titleInelastic transitions and counterflow tunneling in double-dot quantum ratchetsen_US
dc.typeArticleen_US
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