{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:XG4NL6AWMXPJHDZDZCUEHGMENM","short_pith_number":"pith:XG4NL6AW","canonical_record":{"source":{"id":"1206.6698","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2012-06-28T14:09:16Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"c6ed45a28eada51b41ed8c3edbd0eb4a308f755f025c4f9c9d0c4ff1dfc78a7e","abstract_canon_sha256":"4d8d6a7ab3e78be30e222f7fa4bb82ce94f5d61c258499eeaeb3e5a82a6411cd"},"schema_version":"1.0"},"canonical_sha256":"b9b8d5f81665de938f23c8a84399846b1e254d4c1540e7e83d78cd3b73804a81","source":{"kind":"arxiv","id":"1206.6698","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1206.6698","created_at":"2026-05-18T03:46:16Z"},{"alias_kind":"arxiv_version","alias_value":"1206.6698v2","created_at":"2026-05-18T03:46:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1206.6698","created_at":"2026-05-18T03:46:16Z"},{"alias_kind":"pith_short_12","alias_value":"XG4NL6AWMXPJ","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_16","alias_value":"XG4NL6AWMXPJHDZD","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_8","alias_value":"XG4NL6AW","created_at":"2026-05-18T12:27:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:XG4NL6AWMXPJHDZDZCUEHGMENM","target":"record","payload":{"canonical_record":{"source":{"id":"1206.6698","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2012-06-28T14:09:16Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"c6ed45a28eada51b41ed8c3edbd0eb4a308f755f025c4f9c9d0c4ff1dfc78a7e","abstract_canon_sha256":"4d8d6a7ab3e78be30e222f7fa4bb82ce94f5d61c258499eeaeb3e5a82a6411cd"},"schema_version":"1.0"},"canonical_sha256":"b9b8d5f81665de938f23c8a84399846b1e254d4c1540e7e83d78cd3b73804a81","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:46:16.485225Z","signature_b64":"Gf4eBGtzu8V9uvR9KbLrxuS1Q9JzhKUPs+nEEUqU3rD1t9of5GSizPJlWBfQgkNiu86KmNMjYC9o4Sy1BDK+DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b9b8d5f81665de938f23c8a84399846b1e254d4c1540e7e83d78cd3b73804a81","last_reissued_at":"2026-05-18T03:46:16.484560Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:46:16.484560Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1206.6698","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":"2026-05-18T03:46:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"v5CwSdL12AWL/oe8yo7LiZyGN0J80l4m0JPRcFXhLL7E+eXAIbjyPcKalzrkqr+j+fsMc49ydrrwx1cDiRPdBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T23:32:53.247300Z"},"content_sha256":"4d4cafb6bc42501a17791ee3f289ebb982d43bee38b8fc24a536a1908557b4f1","schema_version":"1.0","event_id":"sha256:4d4cafb6bc42501a17791ee3f289ebb982d43bee38b8fc24a536a1908557b4f1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:XG4NL6AWMXPJHDZDZCUEHGMENM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Cross-sectional imaging of individual layers and buried interfaces of graphene-based heterostructures and superlattices","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.mes-hall","authors_text":"A. Gholinia, A. K. Geim, D.C. Elias, K. S. Novoselov, L. A. Ponomarenko, L. Britnell, R. Gorbachev, R. Jalil, S. J. Haigh, S. Romani","submitted_at":"2012-06-28T14:09:16Z","abstract_excerpt":"By stacking various two-dimensional (2D) atomic crystals [1] on top of each other, it is possible to create multilayer heterostructures and devices with designed electronic properties [2-5]. However, various adsorbates become trapped between layers during their assembly, and this not only affects the resulting quality but also prevents the formation of a true artificial layered crystal upheld by van der Waals interaction, creating instead a laminate glued together by contamination. Transmission electron microscopy (TEM) has shown that graphene and boron nitride monolayers, the two best charact"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.6698","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":"2026-05-18T03:46:16Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JCuRaesLxY8p8hBP6L4YDEEYQStZ0gCAi0Q0K3Tx4kw2/iAf9WXBcxRd4uM5c0us+6YfEUHBQhuEIQqpkIATDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T23:32:53.247674Z"},"content_sha256":"4c50101a669cac3e55fccad6b9a0dd5e756c14809e07126d63ead5d061191f0c","schema_version":"1.0","event_id":"sha256:4c50101a669cac3e55fccad6b9a0dd5e756c14809e07126d63ead5d061191f0c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XG4NL6AWMXPJHDZDZCUEHGMENM/bundle.json","state_url":"https://pith.science/pith/XG4NL6AWMXPJHDZDZCUEHGMENM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XG4NL6AWMXPJHDZDZCUEHGMENM/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":"2026-05-31T23:32:53Z","links":{"resolver":"https://pith.science/pith/XG4NL6AWMXPJHDZDZCUEHGMENM","bundle":"https://pith.science/pith/XG4NL6AWMXPJHDZDZCUEHGMENM/bundle.json","state":"https://pith.science/pith/XG4NL6AWMXPJHDZDZCUEHGMENM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XG4NL6AWMXPJHDZDZCUEHGMENM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:XG4NL6AWMXPJHDZDZCUEHGMENM","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":"4d8d6a7ab3e78be30e222f7fa4bb82ce94f5d61c258499eeaeb3e5a82a6411cd","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2012-06-28T14:09:16Z","title_canon_sha256":"c6ed45a28eada51b41ed8c3edbd0eb4a308f755f025c4f9c9d0c4ff1dfc78a7e"},"schema_version":"1.0","source":{"id":"1206.6698","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1206.6698","created_at":"2026-05-18T03:46:16Z"},{"alias_kind":"arxiv_version","alias_value":"1206.6698v2","created_at":"2026-05-18T03:46:16Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1206.6698","created_at":"2026-05-18T03:46:16Z"},{"alias_kind":"pith_short_12","alias_value":"XG4NL6AWMXPJ","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_16","alias_value":"XG4NL6AWMXPJHDZD","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_8","alias_value":"XG4NL6AW","created_at":"2026-05-18T12:27:27Z"}],"graph_snapshots":[{"event_id":"sha256:4c50101a669cac3e55fccad6b9a0dd5e756c14809e07126d63ead5d061191f0c","target":"graph","created_at":"2026-05-18T03:46:16Z","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":"By stacking various two-dimensional (2D) atomic crystals [1] on top of each other, it is possible to create multilayer heterostructures and devices with designed electronic properties [2-5]. However, various adsorbates become trapped between layers during their assembly, and this not only affects the resulting quality but also prevents the formation of a true artificial layered crystal upheld by van der Waals interaction, creating instead a laminate glued together by contamination. Transmission electron microscopy (TEM) has shown that graphene and boron nitride monolayers, the two best charact","authors_text":"A. Gholinia, A. K. Geim, D.C. Elias, K. S. Novoselov, L. A. Ponomarenko, L. Britnell, R. Gorbachev, R. Jalil, S. J. Haigh, S. Romani","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2012-06-28T14:09:16Z","title":"Cross-sectional imaging of individual layers and buried interfaces of graphene-based heterostructures and superlattices"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.6698","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":"sha256:4d4cafb6bc42501a17791ee3f289ebb982d43bee38b8fc24a536a1908557b4f1","target":"record","created_at":"2026-05-18T03:46:16Z","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":"4d8d6a7ab3e78be30e222f7fa4bb82ce94f5d61c258499eeaeb3e5a82a6411cd","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2012-06-28T14:09:16Z","title_canon_sha256":"c6ed45a28eada51b41ed8c3edbd0eb4a308f755f025c4f9c9d0c4ff1dfc78a7e"},"schema_version":"1.0","source":{"id":"1206.6698","kind":"arxiv","version":2}},"canonical_sha256":"b9b8d5f81665de938f23c8a84399846b1e254d4c1540e7e83d78cd3b73804a81","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b9b8d5f81665de938f23c8a84399846b1e254d4c1540e7e83d78cd3b73804a81","first_computed_at":"2026-05-18T03:46:16.484560Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:46:16.484560Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Gf4eBGtzu8V9uvR9KbLrxuS1Q9JzhKUPs+nEEUqU3rD1t9of5GSizPJlWBfQgkNiu86KmNMjYC9o4Sy1BDK+DQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:46:16.485225Z","signed_message":"canonical_sha256_bytes"},"source_id":"1206.6698","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4d4cafb6bc42501a17791ee3f289ebb982d43bee38b8fc24a536a1908557b4f1","sha256:4c50101a669cac3e55fccad6b9a0dd5e756c14809e07126d63ead5d061191f0c"],"state_sha256":"7d984c3809739f518fbc72c76678c37786500e32a2a57e30fa9833aec579a0eb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"H2VljP4qYnBuQPXIELvzUS/nkv6QaW3sodE0OlpY/Fe55G8f/pIT85S1UZz7PsNE//YpTpWL47HGZeRjaAo6Dg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T23:32:53.249833Z","bundle_sha256":"6e8c6f7adb64cb000404923dbb253a9b829c29798c241718b1fceee8819d33ee"}}