Abstract
We have experimentally studied the superconducting behavior of one-dimensional aluminum wires of various lengths. Each wire had much wider two-dimensional contact pads on both sides. At a temperature T below , when the wide pads are driven normal by a perpendicular magnetic field, only samples longer than a critical length, ≃πξ(T), show evidence for superconductivity. This is a direct confirmation of the prediction by Liniger for a normal-metal–superconductor–normal-metal structure with clean interfaces.
DOI:https://doi.org/10.1103/PhysRevB.50.3487
©1994 American Physical Society