Volume 64, Number 4, November 2003
|Page(s)||496 - 502|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 November 2003|
Multiphase superconductivity in skutterudite
Department of Physics and Astronomy, University of Southern California
Los Angeles, CA 90089-0484, USA
2 Department of Physics, Hallym University - Chuncheon 200-702, South Korea
3 Max Planck Institute for the Chemical Physics of Solids - Dresden, Germany
4 Pohl Institute of Solid State Physics, Tongji University - Shanghai 200092, PRC
5 Institute for Solid State Physics, University of Tokyo Kashiwanoha 5-1-5, Kashiwa, Chiba 277-8581, Japan
Corresponding author: email@example.com
Accepted: 8 September 2003
We propose a model of nodal order parameters for the superconducting A- and B-phase of skutterudite and discuss the associated angular-dependent magnetothermal conductivity at low temperatures. The model for the hybrid gap functions containing s- and g-wave parts is consistent with recent thermal-conductivity experiments in . In particular, the model accounts for the data on the polar and azimuthal field angle dependence of . 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 the related exponential behaviour of low-temperature specific heat and thermal conductivity which is very different from d-wave superconductors.
PACS: 74.20.Rp – Pairing symmetries (other than s-wave) / 74.25.Fy – Transport properties (electric and thermal conductivity, thermoelectric effects, etc.) / 74.70.Tx – Heavy-fermion superconductors
© EDP Sciences, 2003
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