Absence of enhanced superconductivity in double-barrier superconducting tunnel junctions: Measurements of lateral electric transport in the middle normal-metal layer

I. P. Nevirkovets; O. Chernyashevskyy; J. B. Ketterson

doi:10.1103/PhysRevB.73.224521

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Absence of enhanced superconductivity in double-barrier superconducting tunnel junctions: Measurements of lateral electric transport in the middle normal-metal layer

I. P. Nevirkovets, O. Chernyashevskyy, J. B. Ketterson

DOI 10.1103/PhysRevB.73.224521 · Physical Review B

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Abstract

The lateral conductivity of the middle Al layer of a Nb∕Al∕AlOx∕Al∕AlOx∕Al∕Nb (SINIS) multiterminal device is studied as a function of the current injected perpendicular to the layers in a regime where a gap-difference-like feature is observed in the current-voltage characteristic. The response of the Al layer does not confirm an earlier reported observation of superconductivity in the Al far above its transition temperature [Blamire et al., Phys. Rev. Lett. 66, 220 (1991)].

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.55	Pressure not reported	onset