{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:SUAKGLJ736RJOIRBMUNP7FGP4R","short_pith_number":"pith:SUAKGLJ7","canonical_record":{"source":{"id":"1908.02431","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-08-07T03:38:25Z","cross_cats_sorted":[],"title_canon_sha256":"0e067fa10772554cce195cc9002fa06ae2e31015eb700d83a833fd62cfaf9949","abstract_canon_sha256":"e54d818491bcc3d2300a24690ea99b57571ed560dfe80ca9afa635408172f164"},"schema_version":"1.0"},"canonical_sha256":"9500a32d3fdfa2972221651aff94cfe448dc94d9b8e68c14bb788a570da096a0","source":{"kind":"arxiv","id":"1908.02431","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.02431","created_at":"2026-07-04T23:52:08Z"},{"alias_kind":"arxiv_version","alias_value":"1908.02431v1","created_at":"2026-07-04T23:52:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.02431","created_at":"2026-07-04T23:52:08Z"},{"alias_kind":"pith_short_12","alias_value":"SUAKGLJ736RJ","created_at":"2026-07-04T23:52:08Z"},{"alias_kind":"pith_short_16","alias_value":"SUAKGLJ736RJOIRB","created_at":"2026-07-04T23:52:08Z"},{"alias_kind":"pith_short_8","alias_value":"SUAKGLJ7","created_at":"2026-07-04T23:52:08Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:SUAKGLJ736RJOIRBMUNP7FGP4R","target":"record","payload":{"canonical_record":{"source":{"id":"1908.02431","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-08-07T03:38:25Z","cross_cats_sorted":[],"title_canon_sha256":"0e067fa10772554cce195cc9002fa06ae2e31015eb700d83a833fd62cfaf9949","abstract_canon_sha256":"e54d818491bcc3d2300a24690ea99b57571ed560dfe80ca9afa635408172f164"},"schema_version":"1.0"},"canonical_sha256":"9500a32d3fdfa2972221651aff94cfe448dc94d9b8e68c14bb788a570da096a0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T23:52:08.872620Z","signature_b64":"fhimHILw4Ok5OjvKTlDM+lIPZ3BKJ2KFpjUoNZ1pO3Z/kpHBV4MtouKgEvI+thknO0J+HMPRUT0yJR/Elb1MDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9500a32d3fdfa2972221651aff94cfe448dc94d9b8e68c14bb788a570da096a0","last_reissued_at":"2026-07-04T23:52:08.872214Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T23:52:08.872214Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1908.02431","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":"2026-07-04T23:52:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NCyzD8pU3vLRdU4l3rt9Y/cJLJ76lD7HfOn6E0CI35v2fbcCt9nUITmE4IBTjxHfRLdtaHGiodZPUZtaycfsDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-09T08:22:40.848928Z"},"content_sha256":"7868740172c43cc946e4766b4cecd164c1fc4a2fe62331852be1be50982f1b05","schema_version":"1.0","event_id":"sha256:7868740172c43cc946e4766b4cecd164c1fc4a2fe62331852be1be50982f1b05"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:SUAKGLJ736RJOIRBMUNP7FGP4R","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Transport phenomena in a free-standing two-dimensional sodium sheet","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Ajit Jena, Wu Li","submitted_at":"2019-08-07T03:38:25Z","abstract_excerpt":"The advances in the growth techniques provide numerous scope to explore the possibilities of new 2D materials for potential applications. With the aid of first-principle calculations we show that 2D Na can be a new addition to the family of thermodynamically stable 2D materials for device applications. Not surprisingly, due to half-occupied $3s$ orbital 2D Na possesses the features of the 2D electron gas (2DEG). The transport properties are examined based on the accurate solution of Boltzmann transport equation. With practically tunable carrier density in 2D materials, the intrinsic electrical"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.02431","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1908.02431/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-04T23:52:08Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6WThXyxJHy0t2gCaIHa5I8sxZgow56D5DocCcHE19fbbjzhvns0Ubm6vlIIgy/f4Ks9YgAln1/64dKgNVWO6Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-09T08:22:40.849581Z"},"content_sha256":"d50ca129a925861e93dce555e3396972f25cd719564d340db39eaa6b6679f4b3","schema_version":"1.0","event_id":"sha256:d50ca129a925861e93dce555e3396972f25cd719564d340db39eaa6b6679f4b3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SUAKGLJ736RJOIRBMUNP7FGP4R/bundle.json","state_url":"https://pith.science/pith/SUAKGLJ736RJOIRBMUNP7FGP4R/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SUAKGLJ736RJOIRBMUNP7FGP4R/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":"2026-07-09T08:22:40Z","links":{"resolver":"https://pith.science/pith/SUAKGLJ736RJOIRBMUNP7FGP4R","bundle":"https://pith.science/pith/SUAKGLJ736RJOIRBMUNP7FGP4R/bundle.json","state":"https://pith.science/pith/SUAKGLJ736RJOIRBMUNP7FGP4R/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SUAKGLJ736RJOIRBMUNP7FGP4R/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:SUAKGLJ736RJOIRBMUNP7FGP4R","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":"e54d818491bcc3d2300a24690ea99b57571ed560dfe80ca9afa635408172f164","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-08-07T03:38:25Z","title_canon_sha256":"0e067fa10772554cce195cc9002fa06ae2e31015eb700d83a833fd62cfaf9949"},"schema_version":"1.0","source":{"id":"1908.02431","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.02431","created_at":"2026-07-04T23:52:08Z"},{"alias_kind":"arxiv_version","alias_value":"1908.02431v1","created_at":"2026-07-04T23:52:08Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.02431","created_at":"2026-07-04T23:52:08Z"},{"alias_kind":"pith_short_12","alias_value":"SUAKGLJ736RJ","created_at":"2026-07-04T23:52:08Z"},{"alias_kind":"pith_short_16","alias_value":"SUAKGLJ736RJOIRB","created_at":"2026-07-04T23:52:08Z"},{"alias_kind":"pith_short_8","alias_value":"SUAKGLJ7","created_at":"2026-07-04T23:52:08Z"}],"graph_snapshots":[{"event_id":"sha256:d50ca129a925861e93dce555e3396972f25cd719564d340db39eaa6b6679f4b3","target":"graph","created_at":"2026-07-04T23:52:08Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1908.02431/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The advances in the growth techniques provide numerous scope to explore the possibilities of new 2D materials for potential applications. With the aid of first-principle calculations we show that 2D Na can be a new addition to the family of thermodynamically stable 2D materials for device applications. Not surprisingly, due to half-occupied $3s$ orbital 2D Na possesses the features of the 2D electron gas (2DEG). The transport properties are examined based on the accurate solution of Boltzmann transport equation. With practically tunable carrier density in 2D materials, the intrinsic electrical","authors_text":"Ajit Jena, Wu Li","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-08-07T03:38:25Z","title":"Transport phenomena in a free-standing two-dimensional sodium sheet"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.02431","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":"sha256:7868740172c43cc946e4766b4cecd164c1fc4a2fe62331852be1be50982f1b05","target":"record","created_at":"2026-07-04T23:52:08Z","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":"e54d818491bcc3d2300a24690ea99b57571ed560dfe80ca9afa635408172f164","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-08-07T03:38:25Z","title_canon_sha256":"0e067fa10772554cce195cc9002fa06ae2e31015eb700d83a833fd62cfaf9949"},"schema_version":"1.0","source":{"id":"1908.02431","kind":"arxiv","version":1}},"canonical_sha256":"9500a32d3fdfa2972221651aff94cfe448dc94d9b8e68c14bb788a570da096a0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9500a32d3fdfa2972221651aff94cfe448dc94d9b8e68c14bb788a570da096a0","first_computed_at":"2026-07-04T23:52:08.872214Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T23:52:08.872214Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fhimHILw4Ok5OjvKTlDM+lIPZ3BKJ2KFpjUoNZ1pO3Z/kpHBV4MtouKgEvI+thknO0J+HMPRUT0yJR/Elb1MDg==","signature_status":"signed_v1","signed_at":"2026-07-04T23:52:08.872620Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.02431","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7868740172c43cc946e4766b4cecd164c1fc4a2fe62331852be1be50982f1b05","sha256:d50ca129a925861e93dce555e3396972f25cd719564d340db39eaa6b6679f4b3"],"state_sha256":"0c21a6b14cad923a46ff0302f9c37279a5c576ef4831ba67b41c71345231e7e4"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WbChv1MWY4yD93hmab9qj6zZWhbkSAAe8dCE/i+XVAL+Rc/MSRLCBfTPapePhsqo1iABFxsjvaMZ+phvhpRrBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-09T08:22:40.853670Z","bundle_sha256":"ef71e104b69115bdd5eb1e35df6bcb86726be2662eec6b24ebe9b4ec42b9a4f2"}}