Multiband Order Parameters for the PrOs(4)Sb(12) and PrRu(4)Sb(12) Skutterudite Superconductors from Thermal Conductivity Measurements

作者：Hill R W^*; Li Shiyan; Maple M B; Taillefer Louis

来源：Physical Review Letters, 2008, 101(23): 237005.

DOI：10.1103/PhysRevLett.101.237005

Thermal conductivity measurements were performed on single crystal samples of the superconducting filled-skutterudite compounds PrOs(4)Sb(12) and PrRu(4)Sb(12) both as a function of temperature and transverse magnetic field. In a zero magnetic field, the low temperature electronic thermal conductivity of PrRu(4)Sb(12) is consistent with a fully gapped Fermi surface. For PrOs(4)Sb(12), residual electronic conduction in the zero-temperature limit is consistent with the presence of nodes in the superconducting energy gap. The electronic thermal conductivity for both compounds shows a rapid rise at low magnetic fields. In PrRu(4)Sb(12), this is interpreted in terms of multiband effects. In PrOs(4)Sb(12), we consider the Doppler shift of nodal quasiparticles and multiband effects.

• 出版日期2008-12-5