The specific heat and the Fermi surface anisotropy in Sr2RuO4

The influence of the Fermi surface anisotropy on the specific heat jump is studied for the p-wave superconductor with a gap function d = (z) over cap( k(x) +/- ik(y)) in connection with Sr2RuO4. It is shown that the normalized specific heat jump, Delta C/gamma T-c is reduced from its "universal" valu e, 1.43, in accordance with experimental findings. We show that this behavi or fits well into our present understanding of the quasiparticle spectrum a nd the impurity effects.