Proximity-coupled high-Tc Josephson junctions: do they exist?

Alan W. Kleinsasser; Kevin A. Delin

doi:10.1117/12.250253

5 July 1996 Proximity-coupled high-T_c Josephson junctions: do they exist?

Alan W. Kleinsasser, Kevin A. Delin

Proceedings Volume 2697, Oxide Superconductor Physics and Nano-Engineering II; (1996) https://doi.org/10.1117/12.250253
Event: Photonics West '96, 1996, San Jose, CA, United States

Abstract

A significant portion of the worldwide effort to develop high-T_c Josephson junctions for electronic applications has been devoted to superconductor-normal-superconductor (SNS) junctions. This paper expands upon our recent review of this subject. Numerous groups have reported nominally-SNS devices with a variety of geometries and normal interlayers. The electrical properties of these junctions have been interpreted almost exclusively with reference to conventional proximity effect theory, which describes the behavior of low-T_c SNS devices very well. In fact, however, almost all high-T_c SNS junctions are better understood by recognizing that transport occurs through unintended pinholes in the normal interlayers. It is only recently that proximity effect theory was successfully applied to any high-T_c device, despite vigorous but unsupported prior claims. The evolution of research on high- T_c SNS junctions is instructive in that it illustrates the danger inherent in assuming that device behavior can be interpreted by simply applying the most obvious theory connected with its intended structure.

Citation Download Citation

Alan W. Kleinsasser and Kevin A. Delin "Proximity-coupled high-T_c Josephson junctions: do they exist?", Proc. SPIE 2697, Oxide Superconductor Physics and Nano-Engineering II, (5 July 1996); https://doi.org/10.1117/12.250253

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