{"paper":{"title":"Spin-density-wave-induced anomalies in the optical conductivity of AFe2As2, (A=Ca, Sr, Ba) single-crystalline iron pnictides","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"A. Charnukha, A. V. Boris, B. Keimer, C. T. Lin, D. L. Sun, D. Pr\\\"opper, T. I. Larkin, T. Wolf, Z. W. Li","submitted_at":"2014-02-03T10:07:58Z","abstract_excerpt":"We report the complex dielectric function of high-quality $A\\textrm{Fe}_2\\textrm{As}_2$, ($A$=Ca, Sr, Ba) single crystals with $T_{\\mathrm{N}}\\approx150\\ \\textrm{K}$, $200\\ \\textrm{K}$, and $138\\ \\textrm{K}$, respectively, determined by broadband spectroscopic ellipsometry at temperatures $10\\leq T\\leq300\\ \\textrm{K}$ and wavenumbers from $100\\ \\textrm{cm}^{-1}$ to $52000\\ \\textrm{cm}^{-1}$. In $\\textrm{CaFe}_2\\textrm{As}_2$ we identify the optical spin-density--wave gap $2\\Delta_{\\mathrm{SDW}}\\approx1250\\ \\textrm{cm}^{-1}$. The $2\\Delta_{\\mathrm{SDW}}/(k_{\\mathrm{B}}T_{\\mathrm{N}})$ ratio, ch"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1402.0325","kind":"arxiv","version":1},"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"}