Universal heat transport in a heavy-fermion superconductor

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dc.creatorShakeripour, H.
dc.creatorTanatar, M. A.
dc.creatorPetrovic, C.
dc.creatorTaillefer, Louis
dc.date2009-02-06
dc.date.accessioned2026-07-07T12:39:18Z
dc.date.available2026-07-07T12:39:18Z
dc.descriptionThe symmetry of the order parameter is the defining property of a superconductor and a strong clue to its pairing mechanism. While d-wave symmetry is firmly established in high-Tc superconductors, in no heavy-fermion superconductor is the symmetry known definitively. One way to elucidate the order parameter is to locate the symmetry-imposed nodes in the energy gap by measuring the heat carried by the zero-energy quasiparticles associated with those nodes as a function of direction. As verified in high-Tc superconductors a line of nodes yields universal heat transport independent of impurity scattering. Here we show that heat conduction in the heavy-fermion superconductor CeIrIn5 is also universal, but only for a current perpendicular to the tetragonal axis of its crystal structure, not parallel to it. This uniaxial anisotropy is strong evidence for a line of nodes in the basal plane, which is inconsistent with the d-wave symmetry proposed for the isostructural superconductor CeCoIn5. Different symmetries in the two materials would explain why the phase diagram of these heavy-fermion compounds consists of two separate superconducting domes.
dc.description15 Pages, 3 figures
dc.identifierhttps://arxiv.org/abs/0902.1190
dc.identifierhttp://arxiv.org/abs/0902.1190
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/219062
dc.subjectStrongly Correlated Electrons
dc.subjectSuperconductivity
dc.titleUniversal heat transport in a heavy-fermion superconductor
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