{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:PVRCDWCUG6QJP6HLYMOR2JN2NE","short_pith_number":"pith:PVRCDWCU","canonical_record":{"source":{"id":"1203.2050","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-03-09T11:38:02Z","cross_cats_sorted":[],"title_canon_sha256":"80d6b207ef122f2e067e4d6cdb508fe837863995aaa3888ea90427173b11504b","abstract_canon_sha256":"12500e02d405551cf10e523a4baf1e61a90a1d17ee89683e11e466b1719754ad"},"schema_version":"1.0"},"canonical_sha256":"7d6221d85437a097f8ebc31d1d25ba690214642390681d86a862f69a0d559d15","source":{"kind":"arxiv","id":"1203.2050","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.2050","created_at":"2026-05-18T04:00:27Z"},{"alias_kind":"arxiv_version","alias_value":"1203.2050v1","created_at":"2026-05-18T04:00:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.2050","created_at":"2026-05-18T04:00:27Z"},{"alias_kind":"pith_short_12","alias_value":"PVRCDWCUG6QJ","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_16","alias_value":"PVRCDWCUG6QJP6HL","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_8","alias_value":"PVRCDWCU","created_at":"2026-05-18T12:27:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:PVRCDWCUG6QJP6HLYMOR2JN2NE","target":"record","payload":{"canonical_record":{"source":{"id":"1203.2050","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-03-09T11:38:02Z","cross_cats_sorted":[],"title_canon_sha256":"80d6b207ef122f2e067e4d6cdb508fe837863995aaa3888ea90427173b11504b","abstract_canon_sha256":"12500e02d405551cf10e523a4baf1e61a90a1d17ee89683e11e466b1719754ad"},"schema_version":"1.0"},"canonical_sha256":"7d6221d85437a097f8ebc31d1d25ba690214642390681d86a862f69a0d559d15","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:00:27.603356Z","signature_b64":"2HNqwnI0NV1+GVrKw1ffgteN49pRn7ef/uIpLmg5Y2LpnAYzfetjLyRjmlXTqn+xXmoyJBtebguzI7VlDc5lAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7d6221d85437a097f8ebc31d1d25ba690214642390681d86a862f69a0d559d15","last_reissued_at":"2026-05-18T04:00:27.602813Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:00:27.602813Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1203.2050","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":"2026-05-18T04:00:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w3YtT65qUuA8SuEwq3Fn8qNjhdneNWiDVJvXEzBGNJQONy/cQffs8ivSVdheJP5UYL99WIc0eT79jP1jG33wCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T00:30:24.369674Z"},"content_sha256":"f2a470488f08fdbc0577ed634f69823a1fab847d686518466f8de37cb11d07f6","schema_version":"1.0","event_id":"sha256:f2a470488f08fdbc0577ed634f69823a1fab847d686518466f8de37cb11d07f6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:PVRCDWCUG6QJP6HLYMOR2JN2NE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Direct evidence of intercalation in a topological insulator turned superconductor","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"A. Thamizhavel, Bhanu Prakash Joshi, Somnath Bhattacharyya, S. Ramakrishnan, Tanmay Das","submitted_at":"2012-03-09T11:38:02Z","abstract_excerpt":"A topological insulator Bi2Se3 which shows superconducting property due to Cu doping has been studied using high resolution transmission electron microscopy which provides for the first time, the direct evidence of intercalation sites. A careful study exhibits the presence of two intercalation sites in this material when projected along the [-1-1 2 0] direction. Stoichiometry of the intercalated unit cell was also calculated from the projected potential."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.2050","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":"2026-05-18T04:00:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BcKx2a9l+5hJ/lKjjaroGcbCW6axGHYihDpxWRFH1wY1KmvARgzM2c/Nnn+ITsTgL+6ttTnyCu+lAxBTLt3xBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T00:30:24.370016Z"},"content_sha256":"d1f5d67eee11106acd3754a4044534a74b5f3f1ba91788d546f402dc30dc348f","schema_version":"1.0","event_id":"sha256:d1f5d67eee11106acd3754a4044534a74b5f3f1ba91788d546f402dc30dc348f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PVRCDWCUG6QJP6HLYMOR2JN2NE/bundle.json","state_url":"https://pith.science/pith/PVRCDWCUG6QJP6HLYMOR2JN2NE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PVRCDWCUG6QJP6HLYMOR2JN2NE/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":"2026-05-28T00:30:24Z","links":{"resolver":"https://pith.science/pith/PVRCDWCUG6QJP6HLYMOR2JN2NE","bundle":"https://pith.science/pith/PVRCDWCUG6QJP6HLYMOR2JN2NE/bundle.json","state":"https://pith.science/pith/PVRCDWCUG6QJP6HLYMOR2JN2NE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PVRCDWCUG6QJP6HLYMOR2JN2NE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:PVRCDWCUG6QJP6HLYMOR2JN2NE","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":"12500e02d405551cf10e523a4baf1e61a90a1d17ee89683e11e466b1719754ad","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-03-09T11:38:02Z","title_canon_sha256":"80d6b207ef122f2e067e4d6cdb508fe837863995aaa3888ea90427173b11504b"},"schema_version":"1.0","source":{"id":"1203.2050","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1203.2050","created_at":"2026-05-18T04:00:27Z"},{"alias_kind":"arxiv_version","alias_value":"1203.2050v1","created_at":"2026-05-18T04:00:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1203.2050","created_at":"2026-05-18T04:00:27Z"},{"alias_kind":"pith_short_12","alias_value":"PVRCDWCUG6QJ","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_16","alias_value":"PVRCDWCUG6QJP6HL","created_at":"2026-05-18T12:27:18Z"},{"alias_kind":"pith_short_8","alias_value":"PVRCDWCU","created_at":"2026-05-18T12:27:18Z"}],"graph_snapshots":[{"event_id":"sha256:d1f5d67eee11106acd3754a4044534a74b5f3f1ba91788d546f402dc30dc348f","target":"graph","created_at":"2026-05-18T04:00:27Z","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":"A topological insulator Bi2Se3 which shows superconducting property due to Cu doping has been studied using high resolution transmission electron microscopy which provides for the first time, the direct evidence of intercalation sites. A careful study exhibits the presence of two intercalation sites in this material when projected along the [-1-1 2 0] direction. Stoichiometry of the intercalated unit cell was also calculated from the projected potential.","authors_text":"A. Thamizhavel, Bhanu Prakash Joshi, Somnath Bhattacharyya, S. Ramakrishnan, Tanmay Das","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-03-09T11:38:02Z","title":"Direct evidence of intercalation in a topological insulator turned superconductor"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1203.2050","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:f2a470488f08fdbc0577ed634f69823a1fab847d686518466f8de37cb11d07f6","target":"record","created_at":"2026-05-18T04:00:27Z","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":"12500e02d405551cf10e523a4baf1e61a90a1d17ee89683e11e466b1719754ad","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-03-09T11:38:02Z","title_canon_sha256":"80d6b207ef122f2e067e4d6cdb508fe837863995aaa3888ea90427173b11504b"},"schema_version":"1.0","source":{"id":"1203.2050","kind":"arxiv","version":1}},"canonical_sha256":"7d6221d85437a097f8ebc31d1d25ba690214642390681d86a862f69a0d559d15","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7d6221d85437a097f8ebc31d1d25ba690214642390681d86a862f69a0d559d15","first_computed_at":"2026-05-18T04:00:27.602813Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:00:27.602813Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2HNqwnI0NV1+GVrKw1ffgteN49pRn7ef/uIpLmg5Y2LpnAYzfetjLyRjmlXTqn+xXmoyJBtebguzI7VlDc5lAA==","signature_status":"signed_v1","signed_at":"2026-05-18T04:00:27.603356Z","signed_message":"canonical_sha256_bytes"},"source_id":"1203.2050","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f2a470488f08fdbc0577ed634f69823a1fab847d686518466f8de37cb11d07f6","sha256:d1f5d67eee11106acd3754a4044534a74b5f3f1ba91788d546f402dc30dc348f"],"state_sha256":"64d9b131385ffdf7759b48c5f2a615dcb295fe1e369ba22423df70b1d4cf7272"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m0+ojk6twFuTdZ7SX0LRaSuNnfmcOq1Rz28QcCjtID2Ae8xmT8ntJzV4rub5cT80JIkvhiSIYrUA87nhQDwqDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T00:30:24.371882Z","bundle_sha256":"1a4af9ae3b464b0feed31e51ae4065a668e280c3d976d27f9211a47b733c3f51"}}