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Direct evidence for, and the nature of, Josephson coupling between Cu-O bilayers in a highly-anisotropic superconductor

机译:在高各向异性超导体中,Cu-O双层之间的Josephson耦合的直接证据和性质

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The angular-dependent, c-axis resistivity for oxygen-deficient YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} single crystals is shown to be a maximum for fields parallel to the c-axis, i.e., for zero macroscopic Lorentz force, and agrees with a series stack of Josephson tunnel junctions. The c-axis component of field dominates the c-axis dissipation in most cases. The results indicate the possibility of an unusual normal-state c-axis conductance and that the c-axis junctions may be extremely underdamped.

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