{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:X3VQNAUVZQCPPG6TDQQUSR5J4U","short_pith_number":"pith:X3VQNAUV","canonical_record":{"source":{"id":"1202.2930","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2012-02-14T03:21:31Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"04743e7b39b1759b60fb7d83b025659bdeff3c88edf68a31206f81f83c567e6a","abstract_canon_sha256":"07750f5216370bf132b313cbe50f28a082bc13e73b775e9d77219bd7ac66f3b1"},"schema_version":"1.0"},"canonical_sha256":"beeb068295cc04f79bd31c214947a9e5066a22aa5d66e795fb804932e930c68c","source":{"kind":"arxiv","id":"1202.2930","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1202.2930","created_at":"2026-05-18T03:55:23Z"},{"alias_kind":"arxiv_version","alias_value":"1202.2930v2","created_at":"2026-05-18T03:55:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.2930","created_at":"2026-05-18T03:55:23Z"},{"alias_kind":"pith_short_12","alias_value":"X3VQNAUVZQCP","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_16","alias_value":"X3VQNAUVZQCPPG6T","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_8","alias_value":"X3VQNAUV","created_at":"2026-05-18T12:27:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:X3VQNAUVZQCPPG6TDQQUSR5J4U","target":"record","payload":{"canonical_record":{"source":{"id":"1202.2930","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2012-02-14T03:21:31Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"04743e7b39b1759b60fb7d83b025659bdeff3c88edf68a31206f81f83c567e6a","abstract_canon_sha256":"07750f5216370bf132b313cbe50f28a082bc13e73b775e9d77219bd7ac66f3b1"},"schema_version":"1.0"},"canonical_sha256":"beeb068295cc04f79bd31c214947a9e5066a22aa5d66e795fb804932e930c68c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:55:23.243695Z","signature_b64":"RHo5OUl77fDI/XWy10Sg3U8L4ZRYpO606RxJCEs9NIznwp38ouuLW7pNR5EVQ61uOURXyaRvczhoPVCCkUCGCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"beeb068295cc04f79bd31c214947a9e5066a22aa5d66e795fb804932e930c68c","last_reissued_at":"2026-05-18T03:55:23.242975Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:55:23.242975Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1202.2930","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":"2026-05-18T03:55:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fM5O26l/F/dIQ7GFSdMkEvcOAjJ1+xcX2mNR4wYhx2adU4s+zhwA1Nfduv3d2rsYBY7PRxHbMMbx9+YY+V4kDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-23T08:32:24.406793Z"},"content_sha256":"c8ccd05110d1bdc5ccbcc53096d17ca08b7ede4505dd7d76215d490f04ca9cb9","schema_version":"1.0","event_id":"sha256:c8ccd05110d1bdc5ccbcc53096d17ca08b7ede4505dd7d76215d490f04ca9cb9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:X3VQNAUVZQCPPG6TDQQUSR5J4U","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Quantum Hall Effect in Bernal Stacked and Twisted Bilayer Graphene Grown on Cu by Chemical Vapor Deposition","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.mes-hall","authors_text":"Babak Fallahazad, E. Tutuc, Kayoung Lee, R. S. Ruoff, Seyoung Kim, Yufeng Hao","submitted_at":"2012-02-14T03:21:31Z","abstract_excerpt":"We examine the quantum Hall effect in bilayer graphene grown on Cu substrates by chemical vapor deposition. Spatially resolved Raman spectroscopy suggests a mixture of Bernal (A-B) stacked and rotationally faulted (twisted) domains. Magnetotransport measurements performed on bilayer domains with a wide 2D band reveal quantum Hall states (QHSs) at filling factors $\\nu=4, 8, 12$ consistent with a Bernal stacked bilayer, while magnetotransport measurements in bilayer domains defined by a narrow 2D band show a superposition of QHSs of two independent monolayers. The analysis of the Shubnikov-de Ha"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.2930","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":"2026-05-18T03:55:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cVHCyO+mxB9cUEvyVFGk+933MP7fdVY3OBKBn0OoXV980MTLSQ/2ddegp1tzZ3IUAATkiu1HSh78WHnD3c25CQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-23T08:32:24.407143Z"},"content_sha256":"3e05c7e0213ea04dc31177bbec5cb67a6ae10251e6e6cfc487dc9a27da7eb0ca","schema_version":"1.0","event_id":"sha256:3e05c7e0213ea04dc31177bbec5cb67a6ae10251e6e6cfc487dc9a27da7eb0ca"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/X3VQNAUVZQCPPG6TDQQUSR5J4U/bundle.json","state_url":"https://pith.science/pith/X3VQNAUVZQCPPG6TDQQUSR5J4U/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/X3VQNAUVZQCPPG6TDQQUSR5J4U/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":"2026-06-23T08:32:24Z","links":{"resolver":"https://pith.science/pith/X3VQNAUVZQCPPG6TDQQUSR5J4U","bundle":"https://pith.science/pith/X3VQNAUVZQCPPG6TDQQUSR5J4U/bundle.json","state":"https://pith.science/pith/X3VQNAUVZQCPPG6TDQQUSR5J4U/state.json","well_known_bundle":"https://pith.science/.well-known/pith/X3VQNAUVZQCPPG6TDQQUSR5J4U/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:X3VQNAUVZQCPPG6TDQQUSR5J4U","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":"07750f5216370bf132b313cbe50f28a082bc13e73b775e9d77219bd7ac66f3b1","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2012-02-14T03:21:31Z","title_canon_sha256":"04743e7b39b1759b60fb7d83b025659bdeff3c88edf68a31206f81f83c567e6a"},"schema_version":"1.0","source":{"id":"1202.2930","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1202.2930","created_at":"2026-05-18T03:55:23Z"},{"alias_kind":"arxiv_version","alias_value":"1202.2930v2","created_at":"2026-05-18T03:55:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.2930","created_at":"2026-05-18T03:55:23Z"},{"alias_kind":"pith_short_12","alias_value":"X3VQNAUVZQCP","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_16","alias_value":"X3VQNAUVZQCPPG6T","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_8","alias_value":"X3VQNAUV","created_at":"2026-05-18T12:27:27Z"}],"graph_snapshots":[{"event_id":"sha256:3e05c7e0213ea04dc31177bbec5cb67a6ae10251e6e6cfc487dc9a27da7eb0ca","target":"graph","created_at":"2026-05-18T03:55:23Z","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 examine the quantum Hall effect in bilayer graphene grown on Cu substrates by chemical vapor deposition. Spatially resolved Raman spectroscopy suggests a mixture of Bernal (A-B) stacked and rotationally faulted (twisted) domains. Magnetotransport measurements performed on bilayer domains with a wide 2D band reveal quantum Hall states (QHSs) at filling factors $\\nu=4, 8, 12$ consistent with a Bernal stacked bilayer, while magnetotransport measurements in bilayer domains defined by a narrow 2D band show a superposition of QHSs of two independent monolayers. The analysis of the Shubnikov-de Ha","authors_text":"Babak Fallahazad, E. Tutuc, Kayoung Lee, R. S. Ruoff, Seyoung Kim, Yufeng Hao","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2012-02-14T03:21:31Z","title":"Quantum Hall Effect in Bernal Stacked and Twisted Bilayer Graphene Grown on Cu by Chemical Vapor Deposition"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.2930","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:c8ccd05110d1bdc5ccbcc53096d17ca08b7ede4505dd7d76215d490f04ca9cb9","target":"record","created_at":"2026-05-18T03:55:23Z","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":"07750f5216370bf132b313cbe50f28a082bc13e73b775e9d77219bd7ac66f3b1","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2012-02-14T03:21:31Z","title_canon_sha256":"04743e7b39b1759b60fb7d83b025659bdeff3c88edf68a31206f81f83c567e6a"},"schema_version":"1.0","source":{"id":"1202.2930","kind":"arxiv","version":2}},"canonical_sha256":"beeb068295cc04f79bd31c214947a9e5066a22aa5d66e795fb804932e930c68c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"beeb068295cc04f79bd31c214947a9e5066a22aa5d66e795fb804932e930c68c","first_computed_at":"2026-05-18T03:55:23.242975Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:55:23.242975Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RHo5OUl77fDI/XWy10Sg3U8L4ZRYpO606RxJCEs9NIznwp38ouuLW7pNR5EVQ61uOURXyaRvczhoPVCCkUCGCw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:55:23.243695Z","signed_message":"canonical_sha256_bytes"},"source_id":"1202.2930","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c8ccd05110d1bdc5ccbcc53096d17ca08b7ede4505dd7d76215d490f04ca9cb9","sha256:3e05c7e0213ea04dc31177bbec5cb67a6ae10251e6e6cfc487dc9a27da7eb0ca"],"state_sha256":"f240160cd444c740edbf13b8a20f96ffe148c70d730f14bff5f8b4e2bbd4b74c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fXs3PDVylFIH41i9YiX1+PemjkvtRW65xma0Ieoxu0ehdT8g9zZ+Cm0LYvNc/XVdbI+485Nj9r2iajLE4wWCCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-23T08:32:24.409085Z","bundle_sha256":"612294f34e0c54878fec4739d22ce0f08b9efad58388d51c9e23a67c6512eb2b"}}