Experimental studies of superconducting weak links

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Cornell University, January, 1976 - Technology & Engineering - 476 pages
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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. The author found a sinusoidal current-phase relation. Measured fluxoid transition distributions were in excellent agreement with the theoretical predictions of Kurkijarvi. In uniform thickness tin bridges the author found the first distinctly non-sinusoidal current-phase relations. Scribed indium bridges were also examined in which the electrodes are thicker than the bridges.

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Contents

Theoretical and Experimental Background
8
Theoretical and Experimental Background
50
Sample Preparation 9 7
97

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