Multiphase Superconductivity in Skutterudite PrOs_4Sb_12

Details Multiphase Superconductivity in Skutterudite PrOs_4Sb_12 Multiphase Superconductivity in Skutterudite PrOs_4Sb_12

2002-12-04

arxiv.org/abs/cond-mat/0212090v2

Physics

Condensed Matter

Superconductivity

7 pages, 3 figures

Scientific paper

10.1209/epl/i2003-00250-2

We propose a model of nodal order parameters for the superconducting A and B - phase of skutterudite PrOs_4Sb_{12} and discuss the associated angular dependent magnetothermal conductivity at low temperatures. The model for the hybrid gap functions \De(k) containing an s- and g- wave parts is consistent with recent thermal conductivity experiments in PrOs_4Sb_12. In particular the model accounts for the data on polar an azimuthal field angle dependence of \kappa_zz(\theta,\phi). The low temperature behaviour of thermodynamic properties in zero field is also presented. We show that the effect of impurity scattering on a nodal hybrid gap function immediately leads the opening of a gap and related exponential behaviour of low temperature specific heat and thermal conductivity which is very different from d- wave superconductors.

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