2008/04/14 by Andrey V. Chubukov, A. V. Chubukov, Chubukov, A. V. +3
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Iron-based superconductors research #Magnetic Properties of Alloys #Rare-earth and actinide compounds #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.str-el
paper · pdf · doi:10.48550/arxiv.0804.2217
5 pages, one figure
arxiv created 2008/04/14 · openalex publication_date 2008/04/14 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Recent observation of a resonance spin excitation at (1/2,1/2,1/2) in the superconducting state of CeCoIn5 [C. Stock et al., Phys. Rev. Lett. \bf 100 087001 (2008)] was interpreted as an evidence for dx2-y2 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 CeCoIn5. 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 dx2-y2 gap.