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Effect of nonmagnetic and magnetic impurities on the specific heat jump in anisotropic superconductors

Leonid A. Openov
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Abstract

The specific-heat jump $ΔC$ at a critical temperature $T_c$ in an anisotropic superconductor containing both potential and spin-flip scatterers is calculated within a weak-coupling mean-field approximation. It is shown that the presence of even a small amount of spin-flip scatterers in the sample leads to a drastic change in the dependence of $ΔC$ on $T_c$ in a disordered $(d+s)$-wave or a strongly anisotropic s-wave superconductor. The implications for experimental tests for the presence of an s-wave admixture in the superconducting order parameter of high-$T_c$ superconductors are discussed.

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Leonid A. Openov. 2004-07-01. Effect of nonmagnetic and magnetic impurities on the specific heat jump in anisotropic superconductors. https://doi.org/10.1103/physrevb.69.224516

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