Experimental studies of superconducting weak links

Technical Report · Thu Jan 01 04:00:00 EST 1976

OSTI ID:7347364

Jackel, L D

The principal contribution of this thesis has been to show that superconducting weak-link current-phase relations are generally not the simple sinusoids predicted by Josephson for a tunnel junction; instead it has been shown that there is a great variety of current-phase relations to be found in different types of weak links. The first measurements were made on an oxidized niobium point contact. A sinusoidal current-phase relation was found. Measured fluxoid transition distributions were in excellent agreement with the theoretical predictions of Kurkijarvi. In uniform thickness tin bridges, the first distinctly non-sinusoidal current-phase relations was found. Scribed indium bridges were also examined in which the electrodes are thicker than the bridges. (GRA)

• Research Organization: Cornell Univ., Ithaca, N.Y. (USA). Materials Science Center
• OSTI ID: 7347364
• Report Number(s): AD-A-020101; MSC-2554
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CURRENTS
ELECTRIC BRIDGES
ELECTRIC CURRENTS
ELECTRICAL EQUIPMENT
ELEMENTS
EQUIPMENT
INDIUM
JOSEPHSON JUNCTIONS
METALS
NIOBIUM
REFRACTORY METALS
SUPERCONDUCTING DEVICES
SUPERCONDUCTING JUNCTIONS
TIN
TRANSITION ELEMENTS