Low-voltage dynamical properties of superconducting weak links

Journal Article · Sun Dec 31 23:00:00 EST 1978 · Phys. Rev., B; (United States)

DOI:https://doi.org/10.1103/PhysRevB.19.225· OSTI ID:6441258

Kao, Y

An extended-resistively-shunted-junction model is described to account for some nonequilibrium effects in superconducting weak links. The theory is based on a one-dimensional linearized time-dependent Ginzburg-Landau equation subject to rigid boundary conditions. An analytical solution has been obtained by WKB approximation in the low-voltage region, and it can be used to calculate the complete position and time dependence of the supercurrent and pair densities. The supercurrent contains a ''cosphi term'' which appears in good agreement with experimental results. The pair density also contains a similar cosphi term. Several length- and temperature-dependent effects are predicted. It is shown that this model gives a quantitative description of the phase-slip process at the center of the weak link.

• Research Organization: Department of Physics, State University of New York at Stony Brook, Stony Brook, New York 11794
• OSTI ID: 6441258
• Journal Information: Phys. Rev., B; (United States), Journal Name: Phys. Rev., B; (United States) Vol. 19:1; ISSN PLRBA
• Country of Publication: United States
• Language: English

Related Subjects

656101* -- Solid State Physics-- Superconductivity-- General Theory-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANALYTICAL SOLUTION
BOUNDARY CONDITIONS
COOPER PAIRS
GINZBURG-LANDAU THEORY
JOSEPHSON JUNCTIONS
PROXIMITY EFFECT
SUPERCONDUCTING JUNCTIONS
TIME DEPENDENCE
TUNNEL EFFECT
WKB APPROXIMATION