Effect of impurities on the low-temperature behavior of the specific heat of anisotropic superconductors in a mixed state
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In the presence of zeros of the order parameter in an anisotropic superconductor, the combined effect of a magnetic field and impurities leads to two different limiting magnetic-field dependences of the specific heat. These dependences are studied both for Born scatterers and in the unitary limit for several specific examples of anisotropic pairing. A estimate is given for the crossover field.
PACS numbers74.60.Ec 74.25.Bt 74.62.Dh
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