Hybrid gap structure in the heavy-fermion superconductor CeIrIn$_5$

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dc.creatorShakeripour, H.
dc.creatorTanatar, M. A.
dc.creatorLi, S. Y.
dc.creatorTaillefer, Louis
dc.creatorPetrovic, C.
dc.date2006-10-02
dc.date2006-10-05
dc.date.accessioned2026-07-07T09:18:19Z
dc.date.available2026-07-07T09:18:19Z
dc.descriptionThe thermal conductivity $κ$ of the heavy-fermion superconductor CeIrIn$_5$ was measured as a function of temperature down to $T_c$/8, for current directions perpendicular ($J \parallel a$) and parallel ($J \parallel c$) to the tetragonal c axis. For $J \parallel a$, a sizable residual linear term $κ_0 / T$ is observed, as previously, which confirms the presence of line nodes in the superconducting gap. For $J \parallel c$, on the other hand, $κ/ T \to 0$ as $T \to 0$. The resulting precipitous decline in the anisotropy ratio $κ_c / κ_a$ at low temperature rules out a gap structure with line nodes running along the c-axis, such as the d-wave state favoured for CeCoIn$_5$, and instead points to a hybrid gap of $E_g$ symmetry. It therefore appears that two distinct superconducting states are realized in the Ce$M$In$_5$ family.
dc.description4 pages, 3 figures, submitted to Phys. Rev. Lett
dc.identifierhttps://arxiv.org/abs/cond-mat/0610052
dc.identifierhttp://arxiv.org/abs/cond-mat/0610052
dc.identifierPhys. Rev. Lett. 99, 187004 (2007)
dc.identifierdoi:10.1103/PhysRevLett.99.187004
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/153981
dc.subjectStrongly Correlated Electrons
dc.subjectSuperconductivity
dc.titleHybrid gap structure in the heavy-fermion superconductor CeIrIn$_5$
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