{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2019:4BBABEJWLC54EIRTMH3LVOMSEY","short_pith_number":"pith:4BBABEJW","schema_version":"1.0","canonical_sha256":"e04200913658bbc2223361f6bab99226272a4eb5f9c37c3ceff562c58b99d805","source":{"kind":"arxiv","id":"1907.11723","version":1},"attestation_state":"computed","paper":{"title":"Ferromagnetism in narrow bands of moir\\'e superlattices","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"C\\'ecile Repellin, T. Senthil, Ya-Hui Zhang, Zhihuan Dong","submitted_at":"2019-07-26T18:00:01Z","abstract_excerpt":"Many graphene moir\\'e superlattices host narrow bands with non-zero valley Chern numbers. We provide analytical and numerical evidence for a robust spin and/or valley polarized insulator at total integer band filling in nearly flat bands of several different moir\\'e materials. In the limit of a perfectly flat band, we present analytical arguments in favor of the ferromagnetic state substantiated by numerical calculations. Further, we numerically evaluate its stability for a finite bandwidth. We provide exact diagonalization results for models appropriate for ABC trilayer graphene aligned with "},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1907.11723","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2019-07-26T18:00:01Z","cross_cats_sorted":[],"title_canon_sha256":"765f46d3018e1f179659b70d387f9a6000550be75eae366683cbf65d630a52c2","abstract_canon_sha256":"8b6dbb84fa974c89c540a28731e8944583816fd963f61edf8a01a7ead5f0135b"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:02:03.225439Z","signature_b64":"9iOHqADYl84GDyO4gV02z62q4ystYGA91/7dFjwMLiEjXYBNw9oebtdUo9j0LoXYh/e7ZSWBEP7gZCzk3PadCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e04200913658bbc2223361f6bab99226272a4eb5f9c37c3ceff562c58b99d805","last_reissued_at":"2026-07-05T01:02:03.224873Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:02:03.224873Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Ferromagnetism in narrow bands of moir\\'e superlattices","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"C\\'ecile Repellin, T. Senthil, Ya-Hui Zhang, Zhihuan Dong","submitted_at":"2019-07-26T18:00:01Z","abstract_excerpt":"Many graphene moir\\'e superlattices host narrow bands with non-zero valley Chern numbers. We provide analytical and numerical evidence for a robust spin and/or valley polarized insulator at total integer band filling in nearly flat bands of several different moir\\'e materials. In the limit of a perfectly flat band, we present analytical arguments in favor of the ferromagnetic state substantiated by numerical calculations. Further, we numerically evaluate its stability for a finite bandwidth. We provide exact diagonalization results for models appropriate for ABC trilayer graphene aligned with "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1907.11723","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/1907.11723/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1907.11723","created_at":"2026-07-05T01:02:03.224933+00:00"},{"alias_kind":"arxiv_version","alias_value":"1907.11723v1","created_at":"2026-07-05T01:02:03.224933+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1907.11723","created_at":"2026-07-05T01:02:03.224933+00:00"},{"alias_kind":"pith_short_12","alias_value":"4BBABEJWLC54","created_at":"2026-07-05T01:02:03.224933+00:00"},{"alias_kind":"pith_short_16","alias_value":"4BBABEJWLC54EIRT","created_at":"2026-07-05T01:02:03.224933+00:00"},{"alias_kind":"pith_short_8","alias_value":"4BBABEJW","created_at":"2026-07-05T01:02:03.224933+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"1908.05417","citing_title":"Collective Excitations of Quantum Anomalous Hall Ferromagnets in Twisted Bilayer Graphene","ref_index":76,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/4BBABEJWLC54EIRTMH3LVOMSEY","json":"https://pith.science/pith/4BBABEJWLC54EIRTMH3LVOMSEY.json","graph_json":"https://pith.science/api/pith-number/4BBABEJWLC54EIRTMH3LVOMSEY/graph.json","events_json":"https://pith.science/api/pith-number/4BBABEJWLC54EIRTMH3LVOMSEY/events.json","paper":"https://pith.science/paper/4BBABEJW"},"agent_actions":{"view_html":"https://pith.science/pith/4BBABEJWLC54EIRTMH3LVOMSEY","download_json":"https://pith.science/pith/4BBABEJWLC54EIRTMH3LVOMSEY.json","view_paper":"https://pith.science/paper/4BBABEJW","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1907.11723&json=true","fetch_graph":"https://pith.science/api/pith-number/4BBABEJWLC54EIRTMH3LVOMSEY/graph.json","fetch_events":"https://pith.science/api/pith-number/4BBABEJWLC54EIRTMH3LVOMSEY/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/4BBABEJWLC54EIRTMH3LVOMSEY/action/timestamp_anchor","attest_storage":"https://pith.science/pith/4BBABEJWLC54EIRTMH3LVOMSEY/action/storage_attestation","attest_author":"https://pith.science/pith/4BBABEJWLC54EIRTMH3LVOMSEY/action/author_attestation","sign_citation":"https://pith.science/pith/4BBABEJWLC54EIRTMH3LVOMSEY/action/citation_signature","submit_replication":"https://pith.science/pith/4BBABEJWLC54EIRTMH3LVOMSEY/action/replication_record"}},"created_at":"2026-07-05T01:02:03.224933+00:00","updated_at":"2026-07-05T01:02:03.224933+00:00"}