{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:CO37DWMHVEFNTQJFCW7XOFI27V","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"8196ab3d2ef6101f5de12df1803c7265ad9cb3843bfd9b166b3130f82c73eb06","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.str-el","submitted_at":"2023-02-01T01:43:25Z","title_canon_sha256":"03b1bdbf9cc0af113acba08015c75ecf6d7032f13a58903f22fa34788e72cd66"},"schema_version":"1.0","source":{"id":"2302.00172","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2302.00172","created_at":"2026-07-05T08:09:41Z"},{"alias_kind":"arxiv_version","alias_value":"2302.00172v1","created_at":"2026-07-05T08:09:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2302.00172","created_at":"2026-07-05T08:09:41Z"},{"alias_kind":"pith_short_12","alias_value":"CO37DWMHVEFN","created_at":"2026-07-05T08:09:41Z"},{"alias_kind":"pith_short_16","alias_value":"CO37DWMHVEFNTQJF","created_at":"2026-07-05T08:09:41Z"},{"alias_kind":"pith_short_8","alias_value":"CO37DWMH","created_at":"2026-07-05T08:09:41Z"}],"graph_snapshots":[{"event_id":"sha256:a5ea7b29e3a7faeda197d01345a7489db93cc7059c6b3877bfd0aac523964fd4","target":"graph","created_at":"2026-07-05T08:09:41Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2302.00172/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Motivated by the recently discovered superconductivity in Sr-doped nickelate oxides NdNiO$_2$, we predict a material BiNiO$_2$ that provides an opportunity to study the intertwined ferroelectricity, metallicity, and magnetism in a crystal with very simple atomic structures. There is a ferroelectric structural transition from the nonpolar phase with the P4/mmm space group to the polar phase with the P4mm space group, which is driven by the lone pair on Bi. Calculations based on the Heyd-Scuseria-Ernzerhof hybrid density functional reveal that both the nonmagnetic and ferromagnetic states are me","authors_text":"Chendong Jin, Hu Zhang, JiangLong Wang, Lulu Zhao, Peng-Lai Gong, Ruifeng Zhang, RuiNing Wang, Ruqian Lian, Xing-Qiang Shi","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.str-el","submitted_at":"2023-02-01T01:43:25Z","title":"From a superconductor NdNiO$_2$ to a Mott multiferroic BiNiO$_2$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2302.00172","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:62651f4e25c501a1535008a34df72148f7ae457ca027bcc0908c6dbde3d26005","target":"record","created_at":"2026-07-05T08:09:41Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"8196ab3d2ef6101f5de12df1803c7265ad9cb3843bfd9b166b3130f82c73eb06","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.str-el","submitted_at":"2023-02-01T01:43:25Z","title_canon_sha256":"03b1bdbf9cc0af113acba08015c75ecf6d7032f13a58903f22fa34788e72cd66"},"schema_version":"1.0","source":{"id":"2302.00172","kind":"arxiv","version":1}},"canonical_sha256":"13b7f1d987a90ad9c12515bf77151afd697855e518730e9d85b3301d1a4c3276","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"13b7f1d987a90ad9c12515bf77151afd697855e518730e9d85b3301d1a4c3276","first_computed_at":"2026-07-05T08:09:41.920005Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:09:41.920005Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HZQ6fDChj+k/ghStQWATedNnzGomYVmFXJI4xuaNb7nrxDATHcttPLe8wl3K0QM012EEbizY4kLXpGmzLX6fCA==","signature_status":"signed_v1","signed_at":"2026-07-05T08:09:41.920504Z","signed_message":"canonical_sha256_bytes"},"source_id":"2302.00172","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:62651f4e25c501a1535008a34df72148f7ae457ca027bcc0908c6dbde3d26005","sha256:a5ea7b29e3a7faeda197d01345a7489db93cc7059c6b3877bfd0aac523964fd4"],"state_sha256":"470269ae966b480eeb0209c04ed0ad0012a9054f2e2099abff39fa782021cf98"}