Role of Interfaces in the Proximity Effect in Anisotropic Superconductors
Emil Polturak, Gad Koren, David Cohen, Ofer Nesher, Roman Mints, Igor Snapiro
Abstract
We report measurements of the critical temperature of YBCO-Co doped YBCO Superconductor-Normal bilayer films. Depending on the morphology of the S-N interface, the coupling between S and N layers can be turned on to depress the critical temperature of S by tens of degrees, or turned down so the layers appear almost totally decoupled. This novel effect can be explained by the mechanism of quasiparticle transmission into an anisotropic superconductor.
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