Spectroscopic Evidence for Multiple Order Parameter Components in the Heavy Fermion Superconductor CeCoIn_5

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dc.creatorRourke, P. M. C.
dc.creatorTanatar, M. A.
dc.creatorTurel, C. S.
dc.creatorBerdeklis, J.
dc.creatorPetrovic, C.
dc.creatorWei, J. Y. T.
dc.date2004-09-22
dc.date2005-04-10
dc.date.accessioned2026-07-07T03:00:56Z
dc.date.available2026-07-07T03:00:56Z
dc.descriptionPoint-contact spectroscopy was performed on single crystals of the heavy-fermion superconductor CeCoIn_5 between 150 mK and 2.5 K. A pulsed measurement technique ensured minimal Joule heating over a wide voltage range. The spectra show Andreev-reflection characteristics with multiple structures which depend on junction impedance. Spectral analysis using the generalized Blonder-Tinkham-Klapwijk formalism for d-wave pairing revealed two coexisting order parameter components, with amplitudes Delta_1 = 0.95 +/- 0.15 meV and Delta_2 = 2.4 +/- 0.3 meV, which evolve differently with temperature. Our observations indicate a highly unconventional pairing mechanism, possibly involving multiple bands.
dc.description4 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0409562
dc.identifierhttp://arxiv.org/abs/cond-mat/0409562
dc.identifierPhys. Rev. Lett. 94, 107005 (2005)
dc.identifierdoi:10.1103/PhysRevLett.94.107005
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/24913
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleSpectroscopic Evidence for Multiple Order Parameter Components in the Heavy Fermion Superconductor CeCoIn_5
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