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Effect of Magnetic Impurity Correlations on Josephson Tunneling

A. Bill·S. A. Wolf·Yu. N. Ovchinnikov·V. Z. Kresin
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Abstract

The ordering trend of magnetic impurities at low temperature results in the frustration of the pair-breaking effect and induces a ``recovery'' of superconducting properties. We show that this effect manifests itself in the deviation of the Josephson current amplitude from the values obtained within the Ambegaokar-Baratoff and the Abrikosov-Gor'kov models. We consider both weak and strong-coupling cases. The theory is applied to describe the experimental data obtained for the low-$T_c$ superconductor SmRh$_4$B$_4$. We further predict a ``recovery'' effect of the Josephson current in high-temperature superconductors.

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A. Bill, S. A. Wolf, Yu. N. Ovchinnikov, V. Z. Kresin. 1998-01-19. Effect of Magnetic Impurity Correlations on Josephson Tunneling. https://doi.org/10.1016/s0921-4534(97)01813-3

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