Superconductivity-enhanced bias spectroscopy in carbon nanotube quantum dots

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dc.creatorGrove-Rasmussen, K.
dc.creatorJørgensen, H. I.
dc.creatorAndersen, B. M.
dc.creatorPaaske, J.
dc.creatorJespersen, T. S.
dc.creatorNygård, J.
dc.creatorFlensberg, K.
dc.creatorLindelof, P. E.
dc.date2008-09-11
dc.date2009-05-25
dc.date.accessioned2026-07-07T13:17:23Z
dc.date.available2026-07-07T13:17:23Z
dc.descriptionWe study low-temperature transport through carbon nanotube quantum dots in the Coulomb blockade regime coupled to niobium-based superconducting leads. We observe pronounced conductance peaks at finite source-drain bias, which we ascribe to elastic and inelastic cotunneling processes enhanced by the coherence peaks in the density of states of the superconducting leads. The inelastic cotunneling lines display a marked dependence on the applied gate voltage which we relate to different tunneling-renormalizations of the two subbands in the nanotube. Finally, we discuss the origin of an especially pronounced sub-gap structure observed in every fourth Coulomb diamond.
dc.identifierhttps://arxiv.org/abs/0809.1944
dc.identifierhttp://arxiv.org/abs/0809.1944
dc.identifierPhys. Rev. B 79, 134518 (2009)
dc.identifierdoi:10.1103/PhysRevB.79.134518
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/231097
dc.subjectMesoscale and Nanoscale Physics
dc.subjectSuperconductivity
dc.titleSuperconductivity-enhanced bias spectroscopy in carbon nanotube quantum dots
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