Penetration depth study in the heavy-fermion superconductor PrOsSb

Shu, L.*; MacLaughlin, D. E.*; Heffner, R. H.; Callaghan, F. D.*; Sonier, J. E.*; Morris, G. D.*; Bernal, O. O.*; Bosse, A.*; Anderson, J. E.*; Yuhasz, W. M.*; et al.

Physica B; Condensed Matter, 374-375, p.247 - 250, 2006/01

https://doi.org/10.1016/j.physb.2005.11.066

The penetration depth in the filled-skutterudite heavy-fermion superconductor PrOsSb has been measured using transverse-field muon spin rotation (TF-SR). It is found to be temperature-independent at low temperatures, consistent with a nonzero gap for point nodes in the gap. A 10 discrepancy is found at low temperatures. This may be due to mechanisms that modify the vortex-state field distribution, or to the surface scattering which breaks pairs in an odd-parity superconductor. Alternatively, it may be a matter of field orientation of nodal gap structure in the SR measurements.