{"paper":{"title":"Infrared study of the charge-ordered multiferroic LuFe(2)O(4)","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.str-el","authors_text":"A. Nucara, C. H. Li (Chinese Ac. Sci.), D. Nicoletti (Univ. Sapienza Rome), F. M. Vitucci, J. C. Soret (Univ. Tours), P. Calvani (Univ. Sapienza Rome), U. Schade (BESSY Berlin), Y. Sun","submitted_at":"2010-05-12T12:20:43Z","abstract_excerpt":"The reflectivity of a large LuFe(2)O(4) single crystal has been measured with the radiation field  either perpendicular or parallel to the c axis of its rhombohedral structure, from 10 to 500K, and from 7 to 16000 cm-1. The transition  between the two-dimensional and the three-dimensional charge order at T_(CO) = 320 K is found to change dramatically the phonon spectrum  in both polarizations. The number of the observed modes above and below T_(CO), according  to a factor-group analysis, is in good agreement with a transition from the rhombohedral space group R{bar 3}m  to the monoclinic C2/m."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1005.2068","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"}