Andreev reflection at high magnetic fields: Evidence for electron and hole transport in edge states

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dc.creatorEroms, J.
dc.creatorWeiss, D.
dc.creatorDe Boeck, J.
dc.creatorBorghs, G.
dc.creatorZülicke, U.
dc.date2004-04-14
dc.date2005-07-20
dc.date.accessioned2026-07-07T02:57:37Z
dc.date.available2026-07-07T02:57:37Z
dc.descriptionWe have studied magnetotransport in arrays of niobium filled grooves in an InAs/AlGaSb heterostructure. The critical field of up to 2.6 T permits to enter the quantum Hall regime. In the superconducting state, we observe strong magnetoresistance oscillations, whose amplitude exceeds the Shubnikov-de Haas oscillations by a factor of about two, when normalized to the background. Additionally, we find that above a geometry-dependent magnetic field value the sample in the superconducting state has a higher longitudinal resistance than in the normal state. Both observations can be explained with edge channels populated with electrons and Andreev reflected holes.
dc.descriptionaccepted for Phys Rev Lett, some changes to text
dc.identifierhttps://arxiv.org/abs/cond-mat/0404323
dc.identifierhttp://arxiv.org/abs/cond-mat/0404323
dc.identifierPhys. Rev. Lett. 95, 107001 (2005)
dc.identifierdoi:10.1103/PhysRevLett.95.107001
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/23738
dc.subjectMesoscale and Nanoscale Physics
dc.subjectSuperconductivity
dc.titleAndreev reflection at high magnetic fields: Evidence for electron and hole transport in edge states
dc.typetext

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