Reentrance effect in a graphene n-p-n junction coupled to a superconductor

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dc.creatorOssipov, A.
dc.creatorTitov, M.
dc.creatorBeenakker, C. W. J.
dc.date2007-04-19
dc.date.accessioned2026-07-07T08:04:33Z
dc.date.available2026-07-07T08:04:33Z
dc.descriptionWe study the interplay of Klein tunneling (= interband tunneling) between n-doped and p-doped regions in graphene and Andreev reflection (= electron-hole conversion) at a superconducting electrode. The tunneling conductance of an n-p-n junction initially increases upon lowering the temperature, while the coherence time of the electron-hole pairs is still less than their lifetime, but then drops back again when the coherence time exceeds the lifetime. This reentrance effect, known from diffusive conductors and ballistic quantum dots, provides a method to detect phase coherent Klein tunneling of electron-hole pairs.
dc.description4 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/0704.2487
dc.identifierhttp://arxiv.org/abs/0704.2487
dc.identifierPhys. Rev. B 75, 241401(R) (2007)
dc.identifierdoi:10.1103/PhysRevB.75.241401
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/130001
dc.subjectMesoscale and Nanoscale Physics
dc.subjectSuperconductivity
dc.titleReentrance effect in a graphene n-p-n junction coupled to a superconductor
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