Proximity Effect in Gold Coated $YBa_2Ca_3O_{7-δ}$ Films Studied by Scanning Tunneling Spectroscopy

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dc.creatorSharoni, Amos
dc.creatorAsulin, Itay
dc.creatorKoren, Gad
dc.creatorMillo, Oded
dc.date2003-07-07
dc.date.accessioned2026-07-07T02:52:12Z
dc.date.available2026-07-07T02:52:12Z
dc.descriptionScanning tunneling spectroscopy on gold layers over-coating \textit{c}-axis $YBa_2Ca_3O_{7-δ}$ (YBCO) films reveals proximity induced gap structures. The gap size reduced exponentially with distance from \textit{a}-axis facets, indicating that the proximity effect is primarily due to the (100) YBCO facets. The penetration depth of superconductivity into the gold is $\sim 30$ nm, in good agreement with estimations for the dirty limit. The extrapolated gap at the interface is $\sim 15$ meV, consistent with recent point-contact experiments. The proximity-induced order parameter appears to have predominant \textit{s}-wave symmetry.
dc.description4 revtex pages, 3 figure
dc.identifierhttps://arxiv.org/abs/cond-mat/0307129
dc.identifierhttp://arxiv.org/abs/cond-mat/0307129
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/21755
dc.subjectSuperconductivity
dc.titleProximity Effect in Gold Coated $YBa_2Ca_3O_{7-δ}$ Films Studied by Scanning Tunneling Spectroscopy
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