{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:BA32L2S5DK263EL5UOAHA57JOR","short_pith_number":"pith:BA32L2S5","canonical_record":{"source":{"id":"1302.1994","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-02-08T11:15:13Z","cross_cats_sorted":[],"title_canon_sha256":"ff02e0a1e3cebba42e5ac5a270de38a8c5d1c3718a266bbd77f347a67c8f891f","abstract_canon_sha256":"fc68e2170774464bc33f6b277df160baf6c004f30afa4c46de9331e8da1ae606"},"schema_version":"1.0"},"canonical_sha256":"0837a5ea5d1ab5ed917da3807077e97479e9c91bb2aab93bb4b285f7e3fdb749","source":{"kind":"arxiv","id":"1302.1994","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1302.1994","created_at":"2026-05-18T03:32:04Z"},{"alias_kind":"arxiv_version","alias_value":"1302.1994v2","created_at":"2026-05-18T03:32:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.1994","created_at":"2026-05-18T03:32:04Z"},{"alias_kind":"pith_short_12","alias_value":"BA32L2S5DK26","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_16","alias_value":"BA32L2S5DK263EL5","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_8","alias_value":"BA32L2S5","created_at":"2026-05-18T12:27:38Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:BA32L2S5DK263EL5UOAHA57JOR","target":"record","payload":{"canonical_record":{"source":{"id":"1302.1994","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-02-08T11:15:13Z","cross_cats_sorted":[],"title_canon_sha256":"ff02e0a1e3cebba42e5ac5a270de38a8c5d1c3718a266bbd77f347a67c8f891f","abstract_canon_sha256":"fc68e2170774464bc33f6b277df160baf6c004f30afa4c46de9331e8da1ae606"},"schema_version":"1.0"},"canonical_sha256":"0837a5ea5d1ab5ed917da3807077e97479e9c91bb2aab93bb4b285f7e3fdb749","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:32:04.773723Z","signature_b64":"PoJuCXlp1RrDkQWaZFqsJiOBTfI2nULmaPkJIk2x/R6JmYLdXnF5k7wG96B44uP2SQi2asRXR/yx72WBenqnAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0837a5ea5d1ab5ed917da3807077e97479e9c91bb2aab93bb4b285f7e3fdb749","last_reissued_at":"2026-05-18T03:32:04.773238Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:32:04.773238Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1302.1994","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:32:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RLaNZva5jqOC7NChSPK9o1smf83oNvm8NgiGY9+ij/LSqKhpdUfrkH0P2SjO0gPf28kdpK3SgD2Hh/E/lIBpBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T12:17:17.497556Z"},"content_sha256":"bdb4005b857bd5effd1a839af08a3f21f3deda3b0eba4c4dd6281fb045359708","schema_version":"1.0","event_id":"sha256:bdb4005b857bd5effd1a839af08a3f21f3deda3b0eba4c4dd6281fb045359708"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:BA32L2S5DK263EL5UOAHA57JOR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Metal-insulator transition and phase separation in doped AA-stacked graphene bilayers","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"A.L. Rakhmanov, A.O. Sboychakov, A.V. Rozhkov, Franco Nori","submitted_at":"2013-02-08T11:15:13Z","abstract_excerpt":"We investigate the doping of AA-stacked graphene bilayers. Applying a mean field theory at zero temperature we find that, at half-filling, the bilayer is an antiferromagnetic insulator. Upon doping, the homogeneous phase becomes unstable with respect to phase separation. The separated phases are an undoped antiferromagnetic insulator and a metal with a non-zero concentration of charge carriers. At sufficiently high doping, the insulating areas shrink and disappear, and the system becomes a homogeneous metal. The conductivity changes drastically upon doping, so the bilayer may be used as a swit"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.1994","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:32:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"z8A8lqGMSRyUEBU+CUrVzKMb6Vzkea409Q45vzHE0+drc/MN8OsIsY4GBDToo7l1mafj4R/v67GgFY1yY841Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T12:17:17.498059Z"},"content_sha256":"c1a0b53a2a10c2f1e3023ec3983eab23ad2afb3ed4bb7b489f175ef3d96e0c6a","schema_version":"1.0","event_id":"sha256:c1a0b53a2a10c2f1e3023ec3983eab23ad2afb3ed4bb7b489f175ef3d96e0c6a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BA32L2S5DK263EL5UOAHA57JOR/bundle.json","state_url":"https://pith.science/pith/BA32L2S5DK263EL5UOAHA57JOR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BA32L2S5DK263EL5UOAHA57JOR/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-26T12:17:17Z","links":{"resolver":"https://pith.science/pith/BA32L2S5DK263EL5UOAHA57JOR","bundle":"https://pith.science/pith/BA32L2S5DK263EL5UOAHA57JOR/bundle.json","state":"https://pith.science/pith/BA32L2S5DK263EL5UOAHA57JOR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BA32L2S5DK263EL5UOAHA57JOR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:BA32L2S5DK263EL5UOAHA57JOR","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":"fc68e2170774464bc33f6b277df160baf6c004f30afa4c46de9331e8da1ae606","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-02-08T11:15:13Z","title_canon_sha256":"ff02e0a1e3cebba42e5ac5a270de38a8c5d1c3718a266bbd77f347a67c8f891f"},"schema_version":"1.0","source":{"id":"1302.1994","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1302.1994","created_at":"2026-05-18T03:32:04Z"},{"alias_kind":"arxiv_version","alias_value":"1302.1994v2","created_at":"2026-05-18T03:32:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.1994","created_at":"2026-05-18T03:32:04Z"},{"alias_kind":"pith_short_12","alias_value":"BA32L2S5DK26","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_16","alias_value":"BA32L2S5DK263EL5","created_at":"2026-05-18T12:27:38Z"},{"alias_kind":"pith_short_8","alias_value":"BA32L2S5","created_at":"2026-05-18T12:27:38Z"}],"graph_snapshots":[{"event_id":"sha256:c1a0b53a2a10c2f1e3023ec3983eab23ad2afb3ed4bb7b489f175ef3d96e0c6a","target":"graph","created_at":"2026-05-18T03:32:04Z","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"},"paper":{"abstract_excerpt":"We investigate the doping of AA-stacked graphene bilayers. Applying a mean field theory at zero temperature we find that, at half-filling, the bilayer is an antiferromagnetic insulator. Upon doping, the homogeneous phase becomes unstable with respect to phase separation. The separated phases are an undoped antiferromagnetic insulator and a metal with a non-zero concentration of charge carriers. At sufficiently high doping, the insulating areas shrink and disappear, and the system becomes a homogeneous metal. The conductivity changes drastically upon doping, so the bilayer may be used as a swit","authors_text":"A.L. Rakhmanov, A.O. Sboychakov, A.V. Rozhkov, Franco Nori","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-02-08T11:15:13Z","title":"Metal-insulator transition and phase separation in doped AA-stacked graphene bilayers"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.1994","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:bdb4005b857bd5effd1a839af08a3f21f3deda3b0eba4c4dd6281fb045359708","target":"record","created_at":"2026-05-18T03:32:04Z","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":"fc68e2170774464bc33f6b277df160baf6c004f30afa4c46de9331e8da1ae606","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-02-08T11:15:13Z","title_canon_sha256":"ff02e0a1e3cebba42e5ac5a270de38a8c5d1c3718a266bbd77f347a67c8f891f"},"schema_version":"1.0","source":{"id":"1302.1994","kind":"arxiv","version":2}},"canonical_sha256":"0837a5ea5d1ab5ed917da3807077e97479e9c91bb2aab93bb4b285f7e3fdb749","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0837a5ea5d1ab5ed917da3807077e97479e9c91bb2aab93bb4b285f7e3fdb749","first_computed_at":"2026-05-18T03:32:04.773238Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:32:04.773238Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PoJuCXlp1RrDkQWaZFqsJiOBTfI2nULmaPkJIk2x/R6JmYLdXnF5k7wG96B44uP2SQi2asRXR/yx72WBenqnAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:32:04.773723Z","signed_message":"canonical_sha256_bytes"},"source_id":"1302.1994","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bdb4005b857bd5effd1a839af08a3f21f3deda3b0eba4c4dd6281fb045359708","sha256:c1a0b53a2a10c2f1e3023ec3983eab23ad2afb3ed4bb7b489f175ef3d96e0c6a"],"state_sha256":"6431bdfdafb45846fd3281ae63ef1bca9cfa726511bd0c871cdb23a7e60816a8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aVOiHqK1TwpSEHx0IfcePtntjT2of8ODjvqJ+q44sRwkQ187zCzNmq4uGgcflPiIcuwP4pAuW7iR+YgZe00TBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T12:17:17.501207Z","bundle_sha256":"a538aa8537311c5e235f4bcb3c47b58e686929375a358b7a1ccdc1b83455a3e8"}}