Upper critical field in p-wave superconductors with broken symmetry

A uniaxially anisotropic p-wave interaction is shown to lead to either a polar or an axial state. We calculate the anisotropy of H/sub c/2(T) with the assumption that E/sub F/>>k/sub B/T/sub c/. Weak-interaction anisotropy leads to a kink in H/sub c/2,perpendicular(T). Otherwise, our results are qualitatively similar to those for an anisotropic s-wave material. Our results indicate that the anisotropy of the H/sub c/2(T) data obtained for UPt3 cannot be explained as intrinsic for a p-wave superconductor unless E/sub F/approx. =k/sub B/T/sub c/. .AE