Experiments using high-Tc/low-Tc Josephson contacts

Details Experiments using high-Tc/low-Tc Josephson contacts Experiments using high-Tc/low-Tc Josephson contacts

2006-06-09

arxiv.org/abs/cond-mat/0606248v2

Physics

Condensed Matter

Superconductivity

25 pages, 10 figures, to appear in "Electron Correlation in New Materials and Nanosystems", NATO Science Series II, Springer,

Scientific paper

Remarkably rich physics is involved in the behavior of hybrid Josephson junctions, connecting high-Tc and low-Tc superconductors. This relates in particular to the different order parameter symmetries underlying the formation of the superconducting states in these materials. Experiments on high-Tc/low-Tc contacts have also played a crucial role in settling the decade-long d-wave versus s-wave debate in cuprate superconductors. Recently, such hybrid junctions have enabled more detailed pairing symmetry tests. Furthermore, with these junctions, complex arrays of pi-rings have been realized, enabling studies on spontaneously generated fractional flux quanta and their mutual interactions. Steps toward novel superconducting electronic devices are taken, utilizing the phase-shifts inherent to the d-wave superconducting order parameter. This paper is intended to reflect the current status of experiments using high-Tc and low-Tc Josephson contacts.

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