Skip to main content

NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.

Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.

U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Singular Current Density in the Planar Superconductor/Normal Metal/Superconductor Junction

Published

Author(s)

R D. Spal

Abstract

Interfacial resistivity (p) is crucial in limiting the maximum current density (Jnmax) in certain superconductor/metal junctions: as p decreases, Jnmax keeps rising until ultimately limited by the superconductor's critical current density. This little known effect is theoretically studied in a circuit with junctions formed by two superconducting contacts on the same face of a normal metal rectangular bar. The corresponding singularly perturbed mixed boundary value problem is solved numerically, and Jnmax is computed over a wide range of p and {l}, the gap between the contacts. Scaling behavior is found, and used to obtain an approximate formula for Jnmax (p,{l}).
Citation
Journal of Applied Physics
Volume
91
Issue
No. 5

Keywords

conformal mapping, electrical impedance tomography, interfacial resistivity, junction, Laplace's equation

Citation

Spal, R. (2002), Singular Current Density in the Planar Superconductor/Normal Metal/Superconductor Junction, Journal of Applied Physics (Accessed October 15, 2025)

Issues

If you have any questions about this publication or are having problems accessing it, please contact [email protected].

Created March 1, 2002, Updated February 19, 2017
Was this page helpful?