Minimum critical length for superconductivity in one-dimensional wires

C. C. Chi; P. Santhanam; S. J. Wind; M. J. Brady; J. J. Bucchignano

doi:10.1103/PhysRevB.50.3487

← Back to search

Minimum critical length for superconductivity in one-dimensional wires

C. C. Chi, P. Santhanam, S. J. Wind, M. J. Brady, J. J. Bucchignano

DOI 10.1103/PhysRevB.50.3487 · Physical Review B

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

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 Tc, when the wide pads are driven normal by a perpendicular magnetic field, only samples longer than a critical length, Lc≃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.

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.	1.24	Pressure not reported	unknown
Al Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1.227	Pressure not reported	midpoint