On the observation of the spin resonance in superconducting CeCoIn_5

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dc.creatorChubukov, A. V.
dc.creatorGor'kov, L. P.
dc.date2008-04-14
dc.date.accessioned2026-07-07T09:32:16Z
dc.date.available2026-07-07T09:32:16Z
dc.descriptionRecent observation of a resonance spin excitation at (1/2,1/2,1/2) in the superconducting state of CeCoIn_5 [C. Stock et al., Phys. Rev. Lett. {\bf 100} 087001 (2008)] was interpreted as an evidence for d_{x^2-y^2} gap symmetry, by analogy with the cuprates. This is true if the resonance is a spin exciton. We argue that such description is undermined by the three-dimensionality of CeCoIn_5. We show that in 3D systems the excitonic resonance only emerges at strong coupling, and is weak. We argue in favor of the alternative, magnon scenario, which does not require a d_{x^2-y^2} gap.
dc.description5 pages, one figure
dc.identifierhttps://arxiv.org/abs/0804.2217
dc.identifierhttp://arxiv.org/abs/0804.2217
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/158751
dc.subjectStrongly Correlated Electrons
dc.titleOn the observation of the spin resonance in superconducting CeCoIn_5
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