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Unconventional superconductivity in CeIrIn$_5$ and CeCoIn$_5$: Specific heat and thermal conductivity studies

R. Movshovich·M. Jaime·J. D. Thompson·C. Petrovic·Z. Fisk·P. G. Pagliuso·J. L. Sarrao
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Abstract

Low temperature specific heat and thermal conductivity measurements on the ambient pressure heavy fermion superconductors CeIrIn5 and CeCoIn5 reveal power law temperature dependences of these quantities below T$_c$. The low temperature specific heat in both CeIrIn5 and CeCoIn5 includes T$^2$ terms, consistent with the presence of nodes in the superconducting energy gap. The thermal conductivity data present a T-linear term consistent with the universal limit (CeIrIn5), and a low temperature T$^3$ variation in the clean limit (CeCoIn5), also in accord with prediction for an unconventional superconductor with lines of nodes.

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R. Movshovich, M. Jaime, J. D. Thompson, C. Petrovic, Z. Fisk, P. G. Pagliuso, J. L. Sarrao. 2001-03-08. Unconventional superconductivity in CeIrIn$_5$ and CeCoIn$_5$: Specific heat and thermal conductivity studies. https://doi.org/10.1103/physrevlett.86.5152

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