Europhys. Lett.
Volume 68, Number 5, December 2004
Page(s) 720 - 725
Section Condensed matter: electronic structure, electrical, magnetic, and optical properties
Published online 10 November 2004
Europhys. Lett., 68 (5), pp. 720-725 (2004)
DOI: 10.1209/epl/i2004-10268-4

Triplet superconductivity in the skutterudite $\chem{PrOs_4Sb_{12}}$

K. Maki1, S. Haas1, D. Parker1, H. Won2, K. Izawa3 and Y. Matsuda3

1  Department of Physics and Astronomy, University of Southern California Los Angeles, CA 90089-0484, USA
2  Department of Physics, Hallym University - Chunchon 200-702, South Korea
3  Institute for Solid State Physics, University of Tokyo Kashiwanoha, Kashiwa, Chiba 277-8581, Japan

received 24 June 2004; accepted in final form 8 October 2004
published online 10 November 2004

There is mounting evidence for triplet superconductivity in the recently discovered skutterudite compound $\chem{PrOs_4Sb_{12}}$. In this work, we propose nodal order parameters for the A and B phases of this superconductor which are consistent with angle-dependent magnetothermal conductivity measurements and with low-temperature thermal conductivity data in the range $T\gtrsim
150$ $\un{mK}$. The quasiparticle density of states and the thermal conductivity $\kappa_{zz}$ are derived within the quasiclassical approximation.

74.70.Tx - Heavy-fermion superconductors.
71.27.+a - Strongly correlated electron systems; heavy fermions.
74.20.Rp - Pairing symmetries (other than s-wave).

© EDP Sciences 2004