Andreev reflection and cyclotron motion at superconductor -- normal-metal interfaces

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dc.creatorGiazotto, F.
dc.creatorGovernale, M.
dc.creatorZuelicke, U.
dc.creatorBeltram, F.
dc.date2005-04-20
dc.date.accessioned2026-07-07T06:24:15Z
dc.date.available2026-07-07T06:24:15Z
dc.descriptionWe investigate Andreev reflection at the interface between a superconductor and a two--dimensional electron system (2DES) in an external magnetic field such that cyclotron motion is important in the latter. A finite Zeeman splitting in the 2DES and the presence of diamagnetic screening currents in the superconductor are incorporated into a microscopic theory of Andreev edge states, which is based on the Bogoliubov--de Gennes formalism. The Andreev--reflection contribution to the interface conductance is calculated. The effect of Zeeman splitting is most visible as a double--step feature in the conductance through clean interfaces. Due to a screening current, conductance steps are shifted to larger filling factors and the formation of Andreev edge states is suppressed below a critical filling factor.
dc.description8 pages, 6 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0504514
dc.identifierhttp://arxiv.org/abs/cond-mat/0504514
dc.identifierPhys. Rev. B 72, 054518 (2005)
dc.identifierdoi:10.1103/PhysRevB.72.054518
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/96483
dc.subjectMesoscale and Nanoscale Physics
dc.subjectSuperconductivity
dc.titleAndreev reflection and cyclotron motion at superconductor -- normal-metal interfaces
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