Theory of transport properties in the -wave superconducting state of SrRuO; A Microscopic determination of the gap structure

Nomura, Takuji

We provide a detailed quantitative analysis of transport properties in the -wave superconducting state of SrRuO. Specifically, we calculate ultrasound attenuation rate and electronic thermal conductivity within the mean field approximation. The momentum dependence of the gap function is determined by solving the Eliashberg equation for a three-band Hubbard model with the realistic electronic structure of SrRuO. Consequently, we obtain the temperature dependence of the transport coefficients in agreement with the experimental results.