{"paper":{"title":"Spin Resonance in the New-Structure-Type Iron-Based Superconductor CaKFe4As4","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"A. D. Christianson, A. Iyo, H. Eisaki, H. Yoshida, K. Iida, K. Kawashima, M. Ishikado, N. Murai, Y. Nagai, Y. Yoshida","submitted_at":"2017-08-03T05:41:10Z","abstract_excerpt":"The dynamical spin susceptibility in the new-structure-type iron-based superconductor CaKFe$_4$As$_4$ was investigated by using a combination of inelastic neutron scattering (INS) measurements and random phase approximation (RPA) calculations. Powder INS measurements show that the spin resonance at $Q_\\text{res}=1.17(1)$~$\\text{\\AA}^{-1}$, corresponding to the $(\\pi,\\pi)$ nesting wave vector in tetragonal notation, evolves below $T_\\text{c}$. The characteristic energy of the spin resonance $E_\\text{res}=12.5$~meV is smaller than twice the size of the superconducting gap ($2\\Delta$). The broad "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.01006","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}