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Author Brawner, D. A. ♦ Ott, H. R.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PHYSICS ♦ BARIUM OXIDES ♦ ORDER PARAMETERS ♦ COPPER OXIDES ♦ HIGH-TC SUPERCONDUCTORS ♦ YTTRIUM OXIDES ♦ CRITICAL CURRENT ♦ D WAVES ♦ JOSEPHSON EFFECT ♦ MAGNETIC FIELDS ♦ OXYGEN ♦ S WAVES
Abstract Several recent phase-sensitive-tunneling experiments have indicated that YBa{sub 2}Cu{sub 3}O{sub 6.9} is not an {ital s}-wave superconductor. In this work we report an analogous experiment on a related cuprate superconductor, YBa{sub 2}Cu{sub 3}O{sub 6.6}, with {ital T}{sub {ital c}}=60 K. The critical current vs applied field of a Pb-YBa{sub 2}Cu{sub 3}O{sub 6.6} single crystal corner Josephson junction is measured and compared with the theory. As a control experiment, measurements are made on a Pb-YBa{sub 2}Cu{sub 3}O{sub 6.6} edge junction. The results are consistent with a {ital d}-wave order parameter for YBa{sub 2}Cu{sub 3}O{sub 6.6}. It is thus unlikely that the results of previous similar experiments on almost fully oxygenated YBa{sub 2}Cu{sub 3}O{sub 6.6} may simply be explained by the presence of the Cu-O chains. {copyright} {ital 1996 The American Physical Society.}
ISSN 01631829
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-04-01
Publisher Place United States
Journal Physical Review, B: Condensed Matter
Volume Number 53
Issue Number 13


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