{"paper":{"title":"Phase diagram of pressure-induced high temperature superconductor La$_{3}$Ni$_{2}$O$_{7+\\delta}$","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"Hibiki Nagata, Hiroto Ohta, Hiroya Sakurai, Kazuki Yamane, Keisuke Hirose, Kensei Terashima, Masaki Kato, Ryo Matsumoto, Yoshihiko Takano, Yuta Ueki","submitted_at":"2024-08-09T09:43:22Z","abstract_excerpt":"We successfully synthesized samples of La$_{3}$Ni$_{2}$O$_{7+\\delta}$ ($\\delta = -0.50$, $-0.16$, $0.00$, $+0.01$, and $+0.12$) and measured the resistance under extremely high pressures using a diamond anvil cell to establish the electronic phase diagram. A Mott insulating state appears at $\\delta = -0.50$, where all Ni ions are divalent. With increasing oxygen content, superconductivity appears at $\\delta = 0.00$ and higher, above approximately 25 GPa, passing through Anderson localization at $\\delta = -0.16$. The superconducting transition temperature $T_{\\mathrm{c}}$ decreases with increas"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2408.04970","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2408.04970/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}