2020
DOI: 10.1016/j.physc.2019.1353566
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Superconductive critical temperature of Pb/Ag heterostructures

Abstract: Recent experimental data (H. Nam et al., Phys. Rev. B 100, 094512 (2019)) of critical temperature and gaps measured on superconductor/normal metal heterostructure (P b/Ag), epitaxially grown, shown a interesting not usual behaviour. The critical temperature decreases strongly but, despite the large differences in the lattice constants and electronic densities of states in the separate components, this heterostructure shows a spatially constant superconducting gap. In the paper it is demonstrated that the prox… Show more

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Cited by 2 publications
(4 citation statements)
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“…The author found the same behavior in the superconductor/normal metal heterostructure (Pb/Ag) epitaxially grown [26]. Furthermore, in this case, we made the same hypothesis and perfectly reproduced the experimental data [12]. One could say that, within a thickness less than the superconducting coherence length, the superconductor "wins" over the metal and this is observable because the Pb has a large coherence length.…”
Section: Resultssupporting
confidence: 78%
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“…The author found the same behavior in the superconductor/normal metal heterostructure (Pb/Ag) epitaxially grown [26]. Furthermore, in this case, we made the same hypothesis and perfectly reproduced the experimental data [12]. One could say that, within a thickness less than the superconducting coherence length, the superconductor "wins" over the metal and this is observable because the Pb has a large coherence length.…”
Section: Resultssupporting
confidence: 78%
“…In this case, as in [5], one may replace the ratio of the thickness of the superconductor metal layer to the thickness of the normal metal layer d S /d N in the de Gennes-Werthamer theory [24,25] by the ratio of the volume fraction P S /P N . This fact allows us to use Eliashberg's theory with the proximity effect [12], without free parameters, to also explain the experimental data, as has been successfully achieved, for example, with experimental data relative to the Pb/Ag heterostructure [26] grown on Si(111) using molecular-beam epitaxy. We will examine the cases where the superconducting nanoparticles are of lead while the normal ones are of silver, copper and aluminum.…”
Section: Introductionmentioning
confidence: 93%
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