PACS. 74.72.-h High-Tc compounds - 74.25.Bt Thermodynamic properties, 74.25.Fy Transport properties (electric and thermal conductivity, thermoelectric effect, etc.),

The newly discovered superconductivity in Sr2RuO4 is most likely of p-wave. We study theoretically the impurity scattering in p-wave superconductors in the unitarity limit. A small amount of impurities not only reduces strongly the superconducting transition temperature, but also modifies dramatically the electronic properties. The present theory describes reasonably well a recent specific-heat measurement in Sr2RuO4.

Growing evidence indicates that the superconductivity in Sr2RuO4 is of isotropic p-wave type, though its definitive proof is still absent. We present a theoretical study of the effect of impurity scattering on p-wave superconductors. In particular the thermodynamic properties and some of the transport properties are calculated, which can be tested experimentally.

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