Abstract

Heavy fermion superconductors are largely studied for their unconventional ground states. We present results on the skutterudite compound PrOs4Sb12 (Tc ≈ 1.8K), and on the heavy-fermion CeCoIn5 (Tc ≈ 2.3K), where both the low field and the low temperature behaviour of their thermal conductivity yield evidence for multigap superconductivity.

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