{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:UH3IZ675OUASRHHSRDWXSVY7HV","short_pith_number":"pith:UH3IZ675","canonical_record":{"source":{"id":"1204.1781","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-04-09T01:35:30Z","cross_cats_sorted":["cond-mat.supr-con","physics.chem-ph"],"title_canon_sha256":"62877953a26cd2e247f1180a2741e77ee3fdbb4d327279ad42244eb27bd659f1","abstract_canon_sha256":"7a425a3688dcfea6f24e1a27cacdaf8faca3e06fbec7ab36d3d373a45dd63484"},"schema_version":"1.0"},"canonical_sha256":"a1f68cfbfd7501289cf288ed79571f3d536896484aa6bbcb4dfb81f6e2eb42fc","source":{"kind":"arxiv","id":"1204.1781","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1204.1781","created_at":"2026-05-18T03:58:15Z"},{"alias_kind":"arxiv_version","alias_value":"1204.1781v1","created_at":"2026-05-18T03:58:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1204.1781","created_at":"2026-05-18T03:58:15Z"},{"alias_kind":"pith_short_12","alias_value":"UH3IZ675OUAS","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_16","alias_value":"UH3IZ675OUASRHHS","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_8","alias_value":"UH3IZ675","created_at":"2026-05-18T12:27:23Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:UH3IZ675OUASRHHSRDWXSVY7HV","target":"record","payload":{"canonical_record":{"source":{"id":"1204.1781","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-04-09T01:35:30Z","cross_cats_sorted":["cond-mat.supr-con","physics.chem-ph"],"title_canon_sha256":"62877953a26cd2e247f1180a2741e77ee3fdbb4d327279ad42244eb27bd659f1","abstract_canon_sha256":"7a425a3688dcfea6f24e1a27cacdaf8faca3e06fbec7ab36d3d373a45dd63484"},"schema_version":"1.0"},"canonical_sha256":"a1f68cfbfd7501289cf288ed79571f3d536896484aa6bbcb4dfb81f6e2eb42fc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:58:15.201592Z","signature_b64":"XhxRGZ0FSOk4o0HPNsGCBcbQtjK8rJepAteFnbH09VjvCIGnw2wqkc5KcY6froTe70Vfjc7OCjSAk9q0GtBqCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a1f68cfbfd7501289cf288ed79571f3d536896484aa6bbcb4dfb81f6e2eb42fc","last_reissued_at":"2026-05-18T03:58:15.200842Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:58:15.200842Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1204.1781","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":"2026-05-18T03:58:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"a21/Pl0vaav10J9Edx5rTjsp434H6JNtI9DcWWIkPfLDwKDbonDDQYEMtxVaAcMIsikrMezcSjrZbVHTgl+7Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T22:10:05.223266Z"},"content_sha256":"502c020881dd6925c724b6369f4ac2ba80e55143d145b65f93942406a2e05754","schema_version":"1.0","event_id":"sha256:502c020881dd6925c724b6369f4ac2ba80e55143d145b65f93942406a2e05754"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:UH3IZ675OUASRHHSRDWXSVY7HV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A First-principles Prediction of Two-Dimensional Superconductivity in Pristine B2C Single layer","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.supr-con","physics.chem-ph"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Jianguo Hou (USTC), Jinlong Yang, Jun Dai, Zhenyu Li","submitted_at":"2012-04-09T01:35:30Z","abstract_excerpt":"Based on first-principles lattice dynamics and electron-phonon coupling calculations, B2C sheet is predicted to be a two-dimensional (2D) phonon-mediated superconductor with a relatively high transition temperature (Tc). The electron-phonon coupling parameter calculated is 0.92, and it is mainly contributed by low frequency out-of-plane phonon modes and electronic states with a {\\pi} character. When the Coulomb pseudopotential is set to 0.10, the estimated temperature Tc is 19.2 K. To be best of our knowledge, B2C is the first pristine 2D superconductor with a Tc higher than the boiling point "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1204.1781","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":"2026-05-18T03:58:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w8MFTVDhFZr+eUB3NL+lupyfZqUT0Sfuh2YZt9X6yXkpkHyR/mXy7fPw5LMh0Gaseyj5BJkO2U8tmJ76tuf+BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T22:10:05.223895Z"},"content_sha256":"27f6b87f6136cf494ae6ea5bd66e6b1345a3ed0170a6d2778ad5c333c596d638","schema_version":"1.0","event_id":"sha256:27f6b87f6136cf494ae6ea5bd66e6b1345a3ed0170a6d2778ad5c333c596d638"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/UH3IZ675OUASRHHSRDWXSVY7HV/bundle.json","state_url":"https://pith.science/pith/UH3IZ675OUASRHHSRDWXSVY7HV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/UH3IZ675OUASRHHSRDWXSVY7HV/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":"2026-05-26T22:10:05Z","links":{"resolver":"https://pith.science/pith/UH3IZ675OUASRHHSRDWXSVY7HV","bundle":"https://pith.science/pith/UH3IZ675OUASRHHSRDWXSVY7HV/bundle.json","state":"https://pith.science/pith/UH3IZ675OUASRHHSRDWXSVY7HV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/UH3IZ675OUASRHHSRDWXSVY7HV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:UH3IZ675OUASRHHSRDWXSVY7HV","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":"7a425a3688dcfea6f24e1a27cacdaf8faca3e06fbec7ab36d3d373a45dd63484","cross_cats_sorted":["cond-mat.supr-con","physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-04-09T01:35:30Z","title_canon_sha256":"62877953a26cd2e247f1180a2741e77ee3fdbb4d327279ad42244eb27bd659f1"},"schema_version":"1.0","source":{"id":"1204.1781","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1204.1781","created_at":"2026-05-18T03:58:15Z"},{"alias_kind":"arxiv_version","alias_value":"1204.1781v1","created_at":"2026-05-18T03:58:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1204.1781","created_at":"2026-05-18T03:58:15Z"},{"alias_kind":"pith_short_12","alias_value":"UH3IZ675OUAS","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_16","alias_value":"UH3IZ675OUASRHHS","created_at":"2026-05-18T12:27:23Z"},{"alias_kind":"pith_short_8","alias_value":"UH3IZ675","created_at":"2026-05-18T12:27:23Z"}],"graph_snapshots":[{"event_id":"sha256:27f6b87f6136cf494ae6ea5bd66e6b1345a3ed0170a6d2778ad5c333c596d638","target":"graph","created_at":"2026-05-18T03:58:15Z","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":"Based on first-principles lattice dynamics and electron-phonon coupling calculations, B2C sheet is predicted to be a two-dimensional (2D) phonon-mediated superconductor with a relatively high transition temperature (Tc). The electron-phonon coupling parameter calculated is 0.92, and it is mainly contributed by low frequency out-of-plane phonon modes and electronic states with a {\\pi} character. When the Coulomb pseudopotential is set to 0.10, the estimated temperature Tc is 19.2 K. To be best of our knowledge, B2C is the first pristine 2D superconductor with a Tc higher than the boiling point ","authors_text":"Jianguo Hou (USTC), Jinlong Yang, Jun Dai, Zhenyu Li","cross_cats":["cond-mat.supr-con","physics.chem-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-04-09T01:35:30Z","title":"A First-principles Prediction of Two-Dimensional Superconductivity in Pristine B2C Single layer"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1204.1781","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":"sha256:502c020881dd6925c724b6369f4ac2ba80e55143d145b65f93942406a2e05754","target":"record","created_at":"2026-05-18T03:58:15Z","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":"7a425a3688dcfea6f24e1a27cacdaf8faca3e06fbec7ab36d3d373a45dd63484","cross_cats_sorted":["cond-mat.supr-con","physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-04-09T01:35:30Z","title_canon_sha256":"62877953a26cd2e247f1180a2741e77ee3fdbb4d327279ad42244eb27bd659f1"},"schema_version":"1.0","source":{"id":"1204.1781","kind":"arxiv","version":1}},"canonical_sha256":"a1f68cfbfd7501289cf288ed79571f3d536896484aa6bbcb4dfb81f6e2eb42fc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a1f68cfbfd7501289cf288ed79571f3d536896484aa6bbcb4dfb81f6e2eb42fc","first_computed_at":"2026-05-18T03:58:15.200842Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:58:15.200842Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"XhxRGZ0FSOk4o0HPNsGCBcbQtjK8rJepAteFnbH09VjvCIGnw2wqkc5KcY6froTe70Vfjc7OCjSAk9q0GtBqCw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:58:15.201592Z","signed_message":"canonical_sha256_bytes"},"source_id":"1204.1781","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:502c020881dd6925c724b6369f4ac2ba80e55143d145b65f93942406a2e05754","sha256:27f6b87f6136cf494ae6ea5bd66e6b1345a3ed0170a6d2778ad5c333c596d638"],"state_sha256":"ec9119f1fdabbc0b181f3860542075b25858c3b0d61faaedd931a9f8e502ab74"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"V+HgXW5UZzjz8JZOjWlN+5EKk79S5GGifN3yL55v2axLKahwVEinz5yw9dLRqLdHmDYaf88acQL9H6GVwbvwCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T22:10:05.227394Z","bundle_sha256":"bf4c7d40e47d517671d93efc9dab19a7dfb5aaed6b318f265048245d3d925770"}}