{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:XDVHL6J4YIYIX7RG6DXUAT4C5V","short_pith_number":"pith:XDVHL6J4","canonical_record":{"source":{"id":"1604.06425","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-04-21T19:02:39Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"ac4687306b22d6ecb9cc46a863e1614e174de4d77d9c2c8610af8d313f29c74f","abstract_canon_sha256":"2d4e63de718a4e7ad32866b93c1c503ca5649d2ac0c701d275d6fba60e546e2d"},"schema_version":"1.0"},"canonical_sha256":"b8ea75f93cc2308bfe26f0ef404f82ed715ba6615835e5ef374d362454e022cb","source":{"kind":"arxiv","id":"1604.06425","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.06425","created_at":"2026-05-18T01:16:30Z"},{"alias_kind":"arxiv_version","alias_value":"1604.06425v1","created_at":"2026-05-18T01:16:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.06425","created_at":"2026-05-18T01:16:30Z"},{"alias_kind":"pith_short_12","alias_value":"XDVHL6J4YIYI","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_16","alias_value":"XDVHL6J4YIYIX7RG","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_8","alias_value":"XDVHL6J4","created_at":"2026-05-18T12:30:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:XDVHL6J4YIYIX7RG6DXUAT4C5V","target":"record","payload":{"canonical_record":{"source":{"id":"1604.06425","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-04-21T19:02:39Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"ac4687306b22d6ecb9cc46a863e1614e174de4d77d9c2c8610af8d313f29c74f","abstract_canon_sha256":"2d4e63de718a4e7ad32866b93c1c503ca5649d2ac0c701d275d6fba60e546e2d"},"schema_version":"1.0"},"canonical_sha256":"b8ea75f93cc2308bfe26f0ef404f82ed715ba6615835e5ef374d362454e022cb","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:16:30.140691Z","signature_b64":"gsLssixQftjL/N6/OeTtQKyGPR5moWxBYuelXhHlSjzMuanPtTFbyHw/+pSNZCuwQXjWprKKpmnKrEKlkSqADA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b8ea75f93cc2308bfe26f0ef404f82ed715ba6615835e5ef374d362454e022cb","last_reissued_at":"2026-05-18T01:16:30.140182Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:16:30.140182Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1604.06425","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":"2026-05-18T01:16:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IxYnGYJ7Q6RqaC/b93eifIkOXlFUg8H3nJ4jgH0JpufF7adWBcwLwGRaFM3VIkBD9aB+fqqJnuQuF/GN7FqTBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T00:44:34.101642Z"},"content_sha256":"7a1527b0af64a0db70d4cd50813b07b576761dc6787d675f765d12b5ad7f6ede","schema_version":"1.0","event_id":"sha256:7a1527b0af64a0db70d4cd50813b07b576761dc6787d675f765d12b5ad7f6ede"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:XDVHL6J4YIYIX7RG6DXUAT4C5V","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Why all the fuss about 2D semiconductors?","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.mes-hall","authors_text":"Andres Castellanos-Gomez","submitted_at":"2016-04-21T19:02:39Z","abstract_excerpt":"Graphene is no longer alone; a family of atomically thin 2D semiconductors has emerged. Optoelectronics and photonics applications are in their experimental infancy but the future holds much promise."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.06425","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":"2026-05-18T01:16:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NZDhpTS3RA6YM3pNfb68Ya26VFFHTSCmQt93yuXWHkFS7Sfumov2mwarHrzawc41dvmlDX7TEt068ypjhNRtAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T00:44:34.101990Z"},"content_sha256":"6c75d8b1b689c2a3166fcb81711fc9e1cbf27ade3f64fd06d50a73704787c6e3","schema_version":"1.0","event_id":"sha256:6c75d8b1b689c2a3166fcb81711fc9e1cbf27ade3f64fd06d50a73704787c6e3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XDVHL6J4YIYIX7RG6DXUAT4C5V/bundle.json","state_url":"https://pith.science/pith/XDVHL6J4YIYIX7RG6DXUAT4C5V/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XDVHL6J4YIYIX7RG6DXUAT4C5V/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":"2026-06-02T00:44:34Z","links":{"resolver":"https://pith.science/pith/XDVHL6J4YIYIX7RG6DXUAT4C5V","bundle":"https://pith.science/pith/XDVHL6J4YIYIX7RG6DXUAT4C5V/bundle.json","state":"https://pith.science/pith/XDVHL6J4YIYIX7RG6DXUAT4C5V/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XDVHL6J4YIYIX7RG6DXUAT4C5V/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:XDVHL6J4YIYIX7RG6DXUAT4C5V","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":"2d4e63de718a4e7ad32866b93c1c503ca5649d2ac0c701d275d6fba60e546e2d","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-04-21T19:02:39Z","title_canon_sha256":"ac4687306b22d6ecb9cc46a863e1614e174de4d77d9c2c8610af8d313f29c74f"},"schema_version":"1.0","source":{"id":"1604.06425","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1604.06425","created_at":"2026-05-18T01:16:30Z"},{"alias_kind":"arxiv_version","alias_value":"1604.06425v1","created_at":"2026-05-18T01:16:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.06425","created_at":"2026-05-18T01:16:30Z"},{"alias_kind":"pith_short_12","alias_value":"XDVHL6J4YIYI","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_16","alias_value":"XDVHL6J4YIYIX7RG","created_at":"2026-05-18T12:30:51Z"},{"alias_kind":"pith_short_8","alias_value":"XDVHL6J4","created_at":"2026-05-18T12:30:51Z"}],"graph_snapshots":[{"event_id":"sha256:6c75d8b1b689c2a3166fcb81711fc9e1cbf27ade3f64fd06d50a73704787c6e3","target":"graph","created_at":"2026-05-18T01:16:30Z","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":"Graphene is no longer alone; a family of atomically thin 2D semiconductors has emerged. Optoelectronics and photonics applications are in their experimental infancy but the future holds much promise.","authors_text":"Andres Castellanos-Gomez","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-04-21T19:02:39Z","title":"Why all the fuss about 2D semiconductors?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.06425","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":"sha256:7a1527b0af64a0db70d4cd50813b07b576761dc6787d675f765d12b5ad7f6ede","target":"record","created_at":"2026-05-18T01:16:30Z","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":"2d4e63de718a4e7ad32866b93c1c503ca5649d2ac0c701d275d6fba60e546e2d","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2016-04-21T19:02:39Z","title_canon_sha256":"ac4687306b22d6ecb9cc46a863e1614e174de4d77d9c2c8610af8d313f29c74f"},"schema_version":"1.0","source":{"id":"1604.06425","kind":"arxiv","version":1}},"canonical_sha256":"b8ea75f93cc2308bfe26f0ef404f82ed715ba6615835e5ef374d362454e022cb","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b8ea75f93cc2308bfe26f0ef404f82ed715ba6615835e5ef374d362454e022cb","first_computed_at":"2026-05-18T01:16:30.140182Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:16:30.140182Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gsLssixQftjL/N6/OeTtQKyGPR5moWxBYuelXhHlSjzMuanPtTFbyHw/+pSNZCuwQXjWprKKpmnKrEKlkSqADA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:16:30.140691Z","signed_message":"canonical_sha256_bytes"},"source_id":"1604.06425","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7a1527b0af64a0db70d4cd50813b07b576761dc6787d675f765d12b5ad7f6ede","sha256:6c75d8b1b689c2a3166fcb81711fc9e1cbf27ade3f64fd06d50a73704787c6e3"],"state_sha256":"99376c49e57060dcad6d46892b8d65b911758c42642afcf9886eaa3973315cf7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Bu1kFmd2EO5xnrVeNsijTsI1SUDcPVfBZwfFPM5krWbvVs01EBrDt5y04E/Y5IFA9CKJBFduIIai26i/K0iIAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T00:44:34.104034Z","bundle_sha256":"e39710e33fa23ceff95ce73e0a5b555f7dd70ed91a63acaeeff9dd18ea05c6ba"}}