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Anomalous interface resistance between oxide superconductors and noble metals

✍ Scribed by J.S. Tsai; I. Takeuchi; H. Tsuge; N. Matsukura; S. Miura

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
423 KB
Volume
165-166
Category
Article
ISSN
0921-4526

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✦ Synopsis

Y-Ba-Cu-O and Bi-Sr-Ca-Cu-O epitaxial films were cleaved in the stream of evaporating noble metals such as Au, A~and Pt to form well defined SN interfaces. All of interfaces showed a contact resistance in the range of 10β€’ Qm, which is much higher than that of metal/metal interfaces. Anisotropy in contact resistance was observed with Rc II /Rcl--15. A pin-hole like phenomenological interface model is given. Several microscopic origins of a such interfacial barrier are discussed. Josephson current was not observed in SNS' junctions made on these interfaces. This is attributed to the small Josephson energy limited by the pin-hole like channels.

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