{"paper":{"title":"Electronic structure of Mott-insulator CaCu3Ti4O12: Photoemission and inverse photoemission study","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"H. J. Im, H. Namatame, H. Sato, K. Takegahara, M. Iwataki, M. Matsunami, M. Taniguchi, M. Tsunekawa, S. Adachi, S. Kimura, S. Yamazaki, T. Usui, T. Watanabe","submitted_at":"2015-04-15T06:59:02Z","abstract_excerpt":"We have performed the photoemission and inverse photoemission experiments to elucidate the origin of Mott insulating states in A-site ordered perovskite CaCu$_3$Ti$_4$O$_{12}$ (CCTO). Experimental results have revealed that Cu 3$d$-O 2$p$ hybridized bands, which are located around the Fermi level in the prediction of the local-density approximation (LDA) band calculations, are actually separated into the upper Hubbard band at $\\sim$ 1.5 eV and the lower Hubbard band at $\\sim$ $-$1.7 eV with a band gap of $\\sim$ 1.5-1.8 eV. We also observed that Cu 3$d$ peak at $\\sim$ $-$3.8 eV and Ti 3$d$ peak"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.03798","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"}