{"paper":{"title":"Multiple-source optical spectral weight transfer in ferromagnetic EuB6","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"B. K. Cho, E. J. Choi, Jungho Kim, Young-June Kim","submitted_at":"2007-03-10T20:08:04Z","abstract_excerpt":"We present the first wide range (2 meV$-$5.5 eV) optical conductivity of EuB$_6$ from reflectivity and ellipsometry measurements. Upon the ferromagnetic transition at T$_{c}$=15.5 K, interband transition $\\sigma_{1}(\\omega)$ decreases at three different energy $\\omega$=0.5, 1.4, 2.75 eV and the lost spectral weight is transferred to the Drude $\\sigma_{1}(\\omega)$ at $\\omega<$0.33 eV. We succeeded in explaining this unprecedented multiple-energy $\\sigma_{1}(\\omega)$ change using LDA+U calculated band structure by Kunes and Pickett (Phys. Rev. B, $\\textbf{69}$,165111). Our finding supports stron"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0703266","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"}