Effect of nonmagnetic and magnetic impurities on the specific heat jump in anisotropic superconductors
Leonid A. Openov
DOI 10.1103/PhysRevB.69.224516 · Physical Review B
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Abstract
The specific-heat jump ΔC at a critical temperature Tc 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 Tc 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-Tc superconductors are discussed.
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