Scaling laws in triplet superconductivity in skutterudite PrOs₄Sb₁₂

Kazumi Maki

University of Southern California

The recent magnetothermal conductivity data indicate clearly the gap functions with point nodes both in the A phase and the B phase of PrOs₄Sb₁₂. We shall explore the scaling laws in this triplet superconductor as proposed by Simon and Lee for d-wave superconductors. We find the thermodynamic functions in the vortex state in both the A phase and the B phase exhibit simple scaling behaviors in the superclean limit (ie (Gamma*Delta)^1/2 <ypsilon, T<Delta where ypsilon = v*sqrt(eH)/2*pi and Gamma is the quasiparticle scattering rate in the normal state). Also the magnetothermal conductivity in the B phase obeys a simple scaling law while the one in the A phase is much more involved.