{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:3SAWAFPVK55LCGXH5MRTLTLDTQ","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":"588cb321a61c199ae771e0a6c653179734d592d770bf0405da130e5365fd469a","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2024-04-12T00:55:57Z","title_canon_sha256":"f1dc02433048ef65a8871d0874a676c473a5842d2ddf274caffabd79482f9bb0"},"schema_version":"1.0","source":{"id":"2404.08177","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2404.08177","created_at":"2026-07-05T10:44:37Z"},{"alias_kind":"arxiv_version","alias_value":"2404.08177v2","created_at":"2026-07-05T10:44:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2404.08177","created_at":"2026-07-05T10:44:37Z"},{"alias_kind":"pith_short_12","alias_value":"3SAWAFPVK55L","created_at":"2026-07-05T10:44:37Z"},{"alias_kind":"pith_short_16","alias_value":"3SAWAFPVK55LCGXH","created_at":"2026-07-05T10:44:37Z"},{"alias_kind":"pith_short_8","alias_value":"3SAWAFPV","created_at":"2026-07-05T10:44:37Z"}],"graph_snapshots":[{"event_id":"sha256:71d06d0a4fcfd3aa206b206471b91e217fff830dc34276b42cbfa2524f33ca1b","target":"graph","created_at":"2026-07-05T10:44:37Z","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/2404.08177/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present a theoretical investigation of the magnetic properties exhibited by twisted bilayer graphene (TBG) systems with small twist angles, where the appearance of flat minibands strongly enhances electron-electron interaction effects. We show that, at three-quarters filling of the conduction miniband, the Stoner mechanism induces a ferromagnetic polarization in the AA-stacking regions, which aligns with recent experimental observations. Our approach models the electronic properties by a tight-binding Hamiltonian combined with a Hubbard mean-field interaction term. We employ a real-space re","authors_text":"Caio Lewenkopf, Eric Su\\'arez Morell, Felipe P\\'erez Riffo, Kevin J. U. Vidarte","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2024-04-12T00:55:57Z","title":"Stoner ferromagnetism in low-angle twisted bilayer graphene at three-quarters filling"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2404.08177","kind":"arxiv","version":2},"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:daa04e7b86b641342409581f0b09101f710da3388456c71f3fe70b4336ea6eeb","target":"record","created_at":"2026-07-05T10:44:37Z","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":"588cb321a61c199ae771e0a6c653179734d592d770bf0405da130e5365fd469a","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2024-04-12T00:55:57Z","title_canon_sha256":"f1dc02433048ef65a8871d0874a676c473a5842d2ddf274caffabd79482f9bb0"},"schema_version":"1.0","source":{"id":"2404.08177","kind":"arxiv","version":2}},"canonical_sha256":"dc816015f5577ab11ae7eb2335cd639c26bdcb44a37de8b993fb879bb1f28594","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dc816015f5577ab11ae7eb2335cd639c26bdcb44a37de8b993fb879bb1f28594","first_computed_at":"2026-07-05T10:44:37.057226Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:44:37.057226Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vdHNLLnXDF+hWCKZpVmw/QkxGyQAgDEU4Mlv/WuvT6KERnFPH9plUrWd9oHLAr7b3tdxCGUTdtyF4myMgQ7NDw==","signature_status":"signed_v1","signed_at":"2026-07-05T10:44:37.057838Z","signed_message":"canonical_sha256_bytes"},"source_id":"2404.08177","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:daa04e7b86b641342409581f0b09101f710da3388456c71f3fe70b4336ea6eeb","sha256:71d06d0a4fcfd3aa206b206471b91e217fff830dc34276b42cbfa2524f33ca1b"],"state_sha256":"427a9071f0941442437957fd56da4c14e871ff45b4a1bd24dabfe42439c24dbf"}