{"paper":{"title":"A Unified Understanding of the Experimental Controlling of the T$_\\text{c}$ of La$_3$Ni$_2$O$_7$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"A bilayer t-J model explains all observed ways to raise or lower Tc in La3Ni2O7 through J_perp and orbital filling.","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"Fan Yang, Jia-Heng Ji, Ming Zhang, Yu-Bo Liu, Zeyu Chen","submitted_at":"2026-03-15T17:56:47Z","abstract_excerpt":"Recently, a series of experiments have been conducted which control the superconducting T$_\\text{c}$ of the bilayer nickelates La$_3$Ni$_2$O$_7$ through tuning the oxygen stoichiometry, the element substitution, the pressure or strain, catching great interests. Here, we provide a unified understanding toward these experiments based on the previously proposed effective $d_{x^2-y^2}$-orbital bilayer $t-J_\\parallel-J_\\perp$ model with model parameters input from first-principle calculations. This model exhibits a T$_\\text{c}$-controlling behavior well analogous to the hole-doped overdoped cuprate"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"This model exhibits a Tc-controlling behavior well analogous to the hole-doped overdoped cuprates, due to near quarter-filling of the d_x2-y2 orbital, and Tc follows the variation of J_perp.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The previously proposed effective d_x2-y2-orbital bilayer t-J model with parameters taken from first-principles calculations accurately captures the low-energy physics and pairing mechanism of La3Ni2O7.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"The d_x2-y2 bilayer t-J model unifies Tc control in La3Ni2O7 via particle-hole asymmetry under doping and dependence on the perpendicular exchange J_perp.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"A bilayer t-J model explains all observed ways to raise or lower Tc in La3Ni2O7 through J_perp and orbital filling.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"cc0ce837cc22ad00447c4aae3e7bccf98113cd7842399396e8b9592d9c2d4134"},"source":{"id":"2603.14519","kind":"arxiv","version":4},"verdict":{"id":"7faf8bbd-0011-4a5e-ad2e-159c7174b4a3","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-15T11:00:01.638564Z","strongest_claim":"This model exhibits a Tc-controlling behavior well analogous to the hole-doped overdoped cuprates, due to near quarter-filling of the d_x2-y2 orbital, and Tc follows the variation of J_perp.","one_line_summary":"The d_x2-y2 bilayer t-J model unifies Tc control in La3Ni2O7 via particle-hole asymmetry under doping and dependence on the perpendicular exchange J_perp.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The previously proposed effective d_x2-y2-orbital bilayer t-J model with parameters taken from first-principles calculations accurately captures the low-energy physics and pairing mechanism of La3Ni2O7.","pith_extraction_headline":"A bilayer t-J model explains all observed ways to raise or lower Tc in La3Ni2O7 through J_perp and orbital filling."},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2603.14519/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":2,"snapshot_sha256":"caa10f7005da324cdd26c0dd362fae0d6a4ec9672f2b89e8f6f02651eab81bb0"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}