{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:4BIENMFOJWBN7YZW2ZRY5QS6G2","short_pith_number":"pith:4BIENMFO","canonical_record":{"source":{"id":"1803.03222","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-03-08T17:43:26Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"13c5908d66aee6923bf32fddb09996cd061ef2ed0e25a1f8f8fbb7cca87bcf73","abstract_canon_sha256":"cc24ed32bdfb2295fa586f06225b89aa0e0b7fdfa6fd92b6c40fd9f48483e3ea"},"schema_version":"1.0"},"canonical_sha256":"e05046b0ae4d82dfe336d6638ec25e3686cafe0b008418b1a9a24bbf62697418","source":{"kind":"arxiv","id":"1803.03222","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.03222","created_at":"2026-05-18T00:21:44Z"},{"alias_kind":"arxiv_version","alias_value":"1803.03222v1","created_at":"2026-05-18T00:21:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.03222","created_at":"2026-05-18T00:21:44Z"},{"alias_kind":"pith_short_12","alias_value":"4BIENMFOJWBN","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"4BIENMFOJWBN7YZW","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"4BIENMFO","created_at":"2026-05-18T12:32:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:4BIENMFOJWBN7YZW2ZRY5QS6G2","target":"record","payload":{"canonical_record":{"source":{"id":"1803.03222","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-03-08T17:43:26Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"13c5908d66aee6923bf32fddb09996cd061ef2ed0e25a1f8f8fbb7cca87bcf73","abstract_canon_sha256":"cc24ed32bdfb2295fa586f06225b89aa0e0b7fdfa6fd92b6c40fd9f48483e3ea"},"schema_version":"1.0"},"canonical_sha256":"e05046b0ae4d82dfe336d6638ec25e3686cafe0b008418b1a9a24bbf62697418","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:21:44.089130Z","signature_b64":"1HnSo2pHkjJGxGGnhqVYab3mPbrT9BqkTm8EzRvyQB+/0CZerrDA89UfCV68RsdqmTiDpo/2VWufXu2jt/b4Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e05046b0ae4d82dfe336d6638ec25e3686cafe0b008418b1a9a24bbf62697418","last_reissued_at":"2026-05-18T00:21:44.088601Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:21:44.088601Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1803.03222","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:21:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"v5wu3Znfr7AA0sogD/dwgcaZufz77RG9XK0asx8eOWbg1HxP1u7nvRb1+Er1Yw8/WuurlfjVSEsjbJ8ZHnqjCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T08:30:04.855832Z"},"content_sha256":"7c0e3a49d49880adcef2abc1ec0359e2bc5c620fa8837d15d35fc125c55c6f15","schema_version":"1.0","event_id":"sha256:7c0e3a49d49880adcef2abc1ec0359e2bc5c620fa8837d15d35fc125c55c6f15"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:4BIENMFOJWBN7YZW2ZRY5QS6G2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Large tunable intrinsic gap in rhombohedral-stacked tetralayer graphene","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.mes-hall","authors_text":"C. N. Lau, Dmitry Smirnov, K. Bleich, K. Myhro, K. Thilahar, S. Che, Y. Lee, Y. Shi","submitted_at":"2018-03-08T17:43:26Z","abstract_excerpt":"In rhombohedral-stacked few-layer graphene, the very flat energy bands near the charge neutrality point are unstable to electronic interactions, giving rise to states with spontaneous broken symmetries. Using transport measurements on suspended rhombohedral-stacked tetralayer graphene, we observe an insulating ground state with a large interaction-induced gap up to 80 meV. This gapped state can be enhanced by a perpendicular magnetic field, and suppressed by an interlayer potential, carrier density, or a critical temperature of ~ 40 K."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.03222","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":""},"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":"2026-05-18T00:21:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KtMI8eK04KWAVKCrYJBOzbhJ524Tvl9ndKOMz2PvLnbbznEON8SxK3c0A5amC2L1SwpY7UbCYc88RuJ83A7ABA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T08:30:04.856179Z"},"content_sha256":"3241defa77aaffd52ff95b06f653a77a45bb30ad70944574e3b730eef92f2884","schema_version":"1.0","event_id":"sha256:3241defa77aaffd52ff95b06f653a77a45bb30ad70944574e3b730eef92f2884"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4BIENMFOJWBN7YZW2ZRY5QS6G2/bundle.json","state_url":"https://pith.science/pith/4BIENMFOJWBN7YZW2ZRY5QS6G2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4BIENMFOJWBN7YZW2ZRY5QS6G2/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":"2026-06-02T08:30:04Z","links":{"resolver":"https://pith.science/pith/4BIENMFOJWBN7YZW2ZRY5QS6G2","bundle":"https://pith.science/pith/4BIENMFOJWBN7YZW2ZRY5QS6G2/bundle.json","state":"https://pith.science/pith/4BIENMFOJWBN7YZW2ZRY5QS6G2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4BIENMFOJWBN7YZW2ZRY5QS6G2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:4BIENMFOJWBN7YZW2ZRY5QS6G2","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":"cc24ed32bdfb2295fa586f06225b89aa0e0b7fdfa6fd92b6c40fd9f48483e3ea","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-03-08T17:43:26Z","title_canon_sha256":"13c5908d66aee6923bf32fddb09996cd061ef2ed0e25a1f8f8fbb7cca87bcf73"},"schema_version":"1.0","source":{"id":"1803.03222","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.03222","created_at":"2026-05-18T00:21:44Z"},{"alias_kind":"arxiv_version","alias_value":"1803.03222v1","created_at":"2026-05-18T00:21:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.03222","created_at":"2026-05-18T00:21:44Z"},{"alias_kind":"pith_short_12","alias_value":"4BIENMFOJWBN","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"4BIENMFOJWBN7YZW","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"4BIENMFO","created_at":"2026-05-18T12:32:05Z"}],"graph_snapshots":[{"event_id":"sha256:3241defa77aaffd52ff95b06f653a77a45bb30ad70944574e3b730eef92f2884","target":"graph","created_at":"2026-05-18T00:21:44Z","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":"In rhombohedral-stacked few-layer graphene, the very flat energy bands near the charge neutrality point are unstable to electronic interactions, giving rise to states with spontaneous broken symmetries. Using transport measurements on suspended rhombohedral-stacked tetralayer graphene, we observe an insulating ground state with a large interaction-induced gap up to 80 meV. This gapped state can be enhanced by a perpendicular magnetic field, and suppressed by an interlayer potential, carrier density, or a critical temperature of ~ 40 K.","authors_text":"C. N. Lau, Dmitry Smirnov, K. Bleich, K. Myhro, K. Thilahar, S. Che, Y. Lee, Y. Shi","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-03-08T17:43:26Z","title":"Large tunable intrinsic gap in rhombohedral-stacked tetralayer graphene"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.03222","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":"sha256:7c0e3a49d49880adcef2abc1ec0359e2bc5c620fa8837d15d35fc125c55c6f15","target":"record","created_at":"2026-05-18T00:21:44Z","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":"cc24ed32bdfb2295fa586f06225b89aa0e0b7fdfa6fd92b6c40fd9f48483e3ea","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2018-03-08T17:43:26Z","title_canon_sha256":"13c5908d66aee6923bf32fddb09996cd061ef2ed0e25a1f8f8fbb7cca87bcf73"},"schema_version":"1.0","source":{"id":"1803.03222","kind":"arxiv","version":1}},"canonical_sha256":"e05046b0ae4d82dfe336d6638ec25e3686cafe0b008418b1a9a24bbf62697418","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e05046b0ae4d82dfe336d6638ec25e3686cafe0b008418b1a9a24bbf62697418","first_computed_at":"2026-05-18T00:21:44.088601Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:21:44.088601Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1HnSo2pHkjJGxGGnhqVYab3mPbrT9BqkTm8EzRvyQB+/0CZerrDA89UfCV68RsdqmTiDpo/2VWufXu2jt/b4Dw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:21:44.089130Z","signed_message":"canonical_sha256_bytes"},"source_id":"1803.03222","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7c0e3a49d49880adcef2abc1ec0359e2bc5c620fa8837d15d35fc125c55c6f15","sha256:3241defa77aaffd52ff95b06f653a77a45bb30ad70944574e3b730eef92f2884"],"state_sha256":"fcb5267ece8e8a7840e131b6041e3507dc12c917ecbbc675079a7a0c7bd31e1e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sp/X5ElAsz6FYo0O1adkuuawDLcjNnpuFfLJ2AfAnuVGF7JFFW5QLtgaRZ94I3k2xuwbNEHrkxuiPoOEFXpvDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T08:30:04.858210Z","bundle_sha256":"d7b7d224a0164670e961665546acfc844135a6c1285604ca77161ae7fadcd378"}}