{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:TRGMYKOGCHDN2O2HJC6UNS6PNH","short_pith_number":"pith:TRGMYKOG","canonical_record":{"source":{"id":"1905.09938","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2019-05-23T21:25:28Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"9a6b329e0eb933fdc3dfeb04cfd208ae286e816387887e07cb839fb69c301da0","abstract_canon_sha256":"a7c87d228e399fabcd11c2fb930edfca9d4c19be30aa1058e679028fc561309e"},"schema_version":"1.0"},"canonical_sha256":"9c4ccc29c611c6dd3b4748bd46cbcf69d729cd4edab042a52cc3d2bdd59e524b","source":{"kind":"arxiv","id":"1905.09938","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.09938","created_at":"2026-05-17T23:44:28Z"},{"alias_kind":"arxiv_version","alias_value":"1905.09938v2","created_at":"2026-05-17T23:44:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.09938","created_at":"2026-05-17T23:44:28Z"},{"alias_kind":"pith_short_12","alias_value":"TRGMYKOGCHDN","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_16","alias_value":"TRGMYKOGCHDN2O2H","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_8","alias_value":"TRGMYKOG","created_at":"2026-05-18T12:33:30Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:TRGMYKOGCHDN2O2HJC6UNS6PNH","target":"record","payload":{"canonical_record":{"source":{"id":"1905.09938","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2019-05-23T21:25:28Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"9a6b329e0eb933fdc3dfeb04cfd208ae286e816387887e07cb839fb69c301da0","abstract_canon_sha256":"a7c87d228e399fabcd11c2fb930edfca9d4c19be30aa1058e679028fc561309e"},"schema_version":"1.0"},"canonical_sha256":"9c4ccc29c611c6dd3b4748bd46cbcf69d729cd4edab042a52cc3d2bdd59e524b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:44:28.443978Z","signature_b64":"aB91jEeXrYfzhpWbSak0CqYiEeCeg2bSYhP/AnexsaKXzVCySI9GJIAXjQJL5KjRBHFqlj8a3cpxi/hJp3f/Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9c4ccc29c611c6dd3b4748bd46cbcf69d729cd4edab042a52cc3d2bdd59e524b","last_reissued_at":"2026-05-17T23:44:28.443375Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:44:28.443375Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1905.09938","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":"2026-05-17T23:44:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Pk7cros/WPkDRA5w+PfcgrhnTgAO8w95yss0U3aMXuMWC3SIhgLA3oYmwhTG+Fg3+NQoY540lYDZz0aSRs7aBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T19:22:47.448308Z"},"content_sha256":"7d723a730d74ff5a894c47924227ad35a8137f296138c47037c40b9a18e88459","schema_version":"1.0","event_id":"sha256:7d723a730d74ff5a894c47924227ad35a8137f296138c47037c40b9a18e88459"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:TRGMYKOGCHDN2O2HJC6UNS6PNH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"An Air-Stable and Atomically Thin Graphene/Gallium Superconducting Heterostructure","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.supr-con","authors_text":"An-Ping Li, Brian Bersch, Chengye Dong, Cui-Zu Chang, Joshua A. Robinson, Jue Jiang, Jun Zhu, Ke Wang, Mingming Fu, Natalie Briggs, Qiang Zou, Shruti Subramanian, Vincent H. Crespi, Ya-Wen Chuang, Yuanxi Wang, Zheng Gai","submitted_at":"2019-05-23T21:25:28Z","abstract_excerpt":"Two-dimensional layered and atomically thin elemental superconductors may be key ingredients in next-generation quantum technologies, if they can be stabilized and integrated into heterostructured devices under ambient conditions. However, atomically thin elemental superconductors are largely unexplored outside ultra-high vacuum due to rapid oxidation, and even 2D layered superconductors require complex encapsulation strategies to maintain material quality. Here we demonstrate environmentally stable, single-crystal, few-atom-thick superconducting gallium, 2D-Ga, produced by confinement heteroe"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.09938","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":"2026-05-17T23:44:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QDfvJd6hdHm5ZD8x9M2TDeXHMbIIRG9t69aNUkQaILrkxesLIGf6mWQLy4abIXBd40j48io7LxywfXpp4Ch4CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T19:22:47.448689Z"},"content_sha256":"bd5478c1ade425e201f7425413f4ccebee75151065369274e98a0181bcec336b","schema_version":"1.0","event_id":"sha256:bd5478c1ade425e201f7425413f4ccebee75151065369274e98a0181bcec336b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TRGMYKOGCHDN2O2HJC6UNS6PNH/bundle.json","state_url":"https://pith.science/pith/TRGMYKOGCHDN2O2HJC6UNS6PNH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TRGMYKOGCHDN2O2HJC6UNS6PNH/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":"2026-06-02T19:22:47Z","links":{"resolver":"https://pith.science/pith/TRGMYKOGCHDN2O2HJC6UNS6PNH","bundle":"https://pith.science/pith/TRGMYKOGCHDN2O2HJC6UNS6PNH/bundle.json","state":"https://pith.science/pith/TRGMYKOGCHDN2O2HJC6UNS6PNH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TRGMYKOGCHDN2O2HJC6UNS6PNH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:TRGMYKOGCHDN2O2HJC6UNS6PNH","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":"a7c87d228e399fabcd11c2fb930edfca9d4c19be30aa1058e679028fc561309e","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2019-05-23T21:25:28Z","title_canon_sha256":"9a6b329e0eb933fdc3dfeb04cfd208ae286e816387887e07cb839fb69c301da0"},"schema_version":"1.0","source":{"id":"1905.09938","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.09938","created_at":"2026-05-17T23:44:28Z"},{"alias_kind":"arxiv_version","alias_value":"1905.09938v2","created_at":"2026-05-17T23:44:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.09938","created_at":"2026-05-17T23:44:28Z"},{"alias_kind":"pith_short_12","alias_value":"TRGMYKOGCHDN","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_16","alias_value":"TRGMYKOGCHDN2O2H","created_at":"2026-05-18T12:33:30Z"},{"alias_kind":"pith_short_8","alias_value":"TRGMYKOG","created_at":"2026-05-18T12:33:30Z"}],"graph_snapshots":[{"event_id":"sha256:bd5478c1ade425e201f7425413f4ccebee75151065369274e98a0181bcec336b","target":"graph","created_at":"2026-05-17T23:44:28Z","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":"Two-dimensional layered and atomically thin elemental superconductors may be key ingredients in next-generation quantum technologies, if they can be stabilized and integrated into heterostructured devices under ambient conditions. However, atomically thin elemental superconductors are largely unexplored outside ultra-high vacuum due to rapid oxidation, and even 2D layered superconductors require complex encapsulation strategies to maintain material quality. Here we demonstrate environmentally stable, single-crystal, few-atom-thick superconducting gallium, 2D-Ga, produced by confinement heteroe","authors_text":"An-Ping Li, Brian Bersch, Chengye Dong, Cui-Zu Chang, Joshua A. Robinson, Jue Jiang, Jun Zhu, Ke Wang, Mingming Fu, Natalie Briggs, Qiang Zou, Shruti Subramanian, Vincent H. Crespi, Ya-Wen Chuang, Yuanxi Wang, Zheng Gai","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2019-05-23T21:25:28Z","title":"An Air-Stable and Atomically Thin Graphene/Gallium Superconducting Heterostructure"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.09938","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":"sha256:7d723a730d74ff5a894c47924227ad35a8137f296138c47037c40b9a18e88459","target":"record","created_at":"2026-05-17T23:44:28Z","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":"a7c87d228e399fabcd11c2fb930edfca9d4c19be30aa1058e679028fc561309e","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2019-05-23T21:25:28Z","title_canon_sha256":"9a6b329e0eb933fdc3dfeb04cfd208ae286e816387887e07cb839fb69c301da0"},"schema_version":"1.0","source":{"id":"1905.09938","kind":"arxiv","version":2}},"canonical_sha256":"9c4ccc29c611c6dd3b4748bd46cbcf69d729cd4edab042a52cc3d2bdd59e524b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9c4ccc29c611c6dd3b4748bd46cbcf69d729cd4edab042a52cc3d2bdd59e524b","first_computed_at":"2026-05-17T23:44:28.443375Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:44:28.443375Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aB91jEeXrYfzhpWbSak0CqYiEeCeg2bSYhP/AnexsaKXzVCySI9GJIAXjQJL5KjRBHFqlj8a3cpxi/hJp3f/Dw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:44:28.443978Z","signed_message":"canonical_sha256_bytes"},"source_id":"1905.09938","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7d723a730d74ff5a894c47924227ad35a8137f296138c47037c40b9a18e88459","sha256:bd5478c1ade425e201f7425413f4ccebee75151065369274e98a0181bcec336b"],"state_sha256":"82e3c8e265ab50593f52e1fc75ba1ceca940043ffc750116a3674e6e7a38c98e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ku8yO53MfO3rVDjlTiYVWOEHY5sYktysjfd+ccRCmgQ46CmPWFELnKDC8Nq4fWvXSyeko2yx8nG1KvMkGIu9Bg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T19:22:47.450687Z","bundle_sha256":"fcbb0d15583fb70886712ecb1d4096878bec6dc3ddd2b4af24ef6ecf39479603"}}