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Multiphase Superconductivity in Skutterudite PrOs_4Sb_12

K. Maki·H. Won·P. Thalmeier·Q. Yuan·K. Izawa·Y. Matsuda
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Abstract

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 κ_zz(θ,ϕ). 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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K. Maki, H. Won, P. Thalmeier, Q. Yuan, K. Izawa, Y. Matsuda. 2003-07-19. Multiphase Superconductivity in Skutterudite PrOs_4Sb_12. https://doi.org/10.1209/epl%2Fi2003-00250-2

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