{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:R5OYQQXX4PJHFVZ3VGJ5MCXOTJ","short_pith_number":"pith:R5OYQQXX","canonical_record":{"source":{"id":"1001.1614","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2010-01-11T09:44:05Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"bdd19da4e57c4040e738c07a1b7aea990b67f91e7527a7cd087f863751176369","abstract_canon_sha256":"98a79de41799928b5109c38d78dd1b004c90c2b91e33fb07d8d8cf383f147efd"},"schema_version":"1.0"},"canonical_sha256":"8f5d8842f7e3d272d73ba993d60aee9a62260f328398a1273f7e0fb83b2c4bb0","source":{"kind":"arxiv","id":"1001.1614","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1001.1614","created_at":"2026-05-18T02:10:03Z"},{"alias_kind":"arxiv_version","alias_value":"1001.1614v2","created_at":"2026-05-18T02:10:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1001.1614","created_at":"2026-05-18T02:10:03Z"},{"alias_kind":"pith_short_12","alias_value":"R5OYQQXX4PJH","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_16","alias_value":"R5OYQQXX4PJHFVZ3","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_8","alias_value":"R5OYQQXX","created_at":"2026-05-18T12:26:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:R5OYQQXX4PJHFVZ3VGJ5MCXOTJ","target":"record","payload":{"canonical_record":{"source":{"id":"1001.1614","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2010-01-11T09:44:05Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"bdd19da4e57c4040e738c07a1b7aea990b67f91e7527a7cd087f863751176369","abstract_canon_sha256":"98a79de41799928b5109c38d78dd1b004c90c2b91e33fb07d8d8cf383f147efd"},"schema_version":"1.0"},"canonical_sha256":"8f5d8842f7e3d272d73ba993d60aee9a62260f328398a1273f7e0fb83b2c4bb0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:10:03.183521Z","signature_b64":"1hen5F8oZ0b7R8W/B3GPssE3Ik3f7y5Sn7qlisqGY6z5O/59USPC9lhIRscErH6RPlImcZ2jt8Unj1in0yLQBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8f5d8842f7e3d272d73ba993d60aee9a62260f328398a1273f7e0fb83b2c4bb0","last_reissued_at":"2026-05-18T02:10:03.183106Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:10:03.183106Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1001.1614","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":"2026-05-18T02:10:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9vKE8rQyJOzkdBakgmgjLfOOQGy/gxlQ2a4L9AJL2mhnPBT+EP0zmZyIGSx/zeyCf4AG11FywHhiG9KTBT7cDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T08:54:33.915969Z"},"content_sha256":"62354d5cb91d6fa2a8870016b87fc671fe3dc0b83a3e5189672f7a6d36eb100d","schema_version":"1.0","event_id":"sha256:62354d5cb91d6fa2a8870016b87fc671fe3dc0b83a3e5189672f7a6d36eb100d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:R5OYQQXX4PJHFVZ3VGJ5MCXOTJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Effect of a magnetic field on the two-phonon Raman scattering in graphene","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.mes-hall","authors_text":"C. Berger, C. Faugeras, D.M. Basko, M. Amado, M. Potemski, M. Sprinkle, P. Kossacki, W.A. de Heer","submitted_at":"2010-01-11T09:44:05Z","abstract_excerpt":"We have studied, both experimentally and theoretically, the change of the so-called 2D band of the Raman scattering spectrum of graphene (the two-phonon peak near 2700 cm-1) in an external magnetic field applied perpendicular to the graphene crystal plane at liquid helium temperature. A shift to lower frequency and broadening of this band is observed as the magnetic field is increased from 0 to 33 T. At fields up to 5--10 T the changes are quadratic in the field while they become linear at higher magnetic fields. This effect is explained by the curving of the quasiclassical trajectories of the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1001.1614","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":"2026-05-18T02:10:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WQ84/iIrNh9bO7TtzMLrHSMDvjqVPAB6fer16eW+4pyq5VyRK0EJxVEgIY7QtjgzA9Y3uWOC80DaXibldwZIBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T08:54:33.916673Z"},"content_sha256":"acf8b453b2a88441aaa107c48879af35099ab26749baafa4d723ae06a97686bf","schema_version":"1.0","event_id":"sha256:acf8b453b2a88441aaa107c48879af35099ab26749baafa4d723ae06a97686bf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/R5OYQQXX4PJHFVZ3VGJ5MCXOTJ/bundle.json","state_url":"https://pith.science/pith/R5OYQQXX4PJHFVZ3VGJ5MCXOTJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/R5OYQQXX4PJHFVZ3VGJ5MCXOTJ/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":"2026-05-27T08:54:33Z","links":{"resolver":"https://pith.science/pith/R5OYQQXX4PJHFVZ3VGJ5MCXOTJ","bundle":"https://pith.science/pith/R5OYQQXX4PJHFVZ3VGJ5MCXOTJ/bundle.json","state":"https://pith.science/pith/R5OYQQXX4PJHFVZ3VGJ5MCXOTJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/R5OYQQXX4PJHFVZ3VGJ5MCXOTJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:R5OYQQXX4PJHFVZ3VGJ5MCXOTJ","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":"98a79de41799928b5109c38d78dd1b004c90c2b91e33fb07d8d8cf383f147efd","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2010-01-11T09:44:05Z","title_canon_sha256":"bdd19da4e57c4040e738c07a1b7aea990b67f91e7527a7cd087f863751176369"},"schema_version":"1.0","source":{"id":"1001.1614","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1001.1614","created_at":"2026-05-18T02:10:03Z"},{"alias_kind":"arxiv_version","alias_value":"1001.1614v2","created_at":"2026-05-18T02:10:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1001.1614","created_at":"2026-05-18T02:10:03Z"},{"alias_kind":"pith_short_12","alias_value":"R5OYQQXX4PJH","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_16","alias_value":"R5OYQQXX4PJHFVZ3","created_at":"2026-05-18T12:26:13Z"},{"alias_kind":"pith_short_8","alias_value":"R5OYQQXX","created_at":"2026-05-18T12:26:13Z"}],"graph_snapshots":[{"event_id":"sha256:acf8b453b2a88441aaa107c48879af35099ab26749baafa4d723ae06a97686bf","target":"graph","created_at":"2026-05-18T02:10:03Z","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":"We have studied, both experimentally and theoretically, the change of the so-called 2D band of the Raman scattering spectrum of graphene (the two-phonon peak near 2700 cm-1) in an external magnetic field applied perpendicular to the graphene crystal plane at liquid helium temperature. A shift to lower frequency and broadening of this band is observed as the magnetic field is increased from 0 to 33 T. At fields up to 5--10 T the changes are quadratic in the field while they become linear at higher magnetic fields. This effect is explained by the curving of the quasiclassical trajectories of the","authors_text":"C. Berger, C. Faugeras, D.M. Basko, M. Amado, M. Potemski, M. Sprinkle, P. Kossacki, W.A. de Heer","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2010-01-11T09:44:05Z","title":"Effect of a magnetic field on the two-phonon Raman scattering in graphene"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1001.1614","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":"sha256:62354d5cb91d6fa2a8870016b87fc671fe3dc0b83a3e5189672f7a6d36eb100d","target":"record","created_at":"2026-05-18T02:10:03Z","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":"98a79de41799928b5109c38d78dd1b004c90c2b91e33fb07d8d8cf383f147efd","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2010-01-11T09:44:05Z","title_canon_sha256":"bdd19da4e57c4040e738c07a1b7aea990b67f91e7527a7cd087f863751176369"},"schema_version":"1.0","source":{"id":"1001.1614","kind":"arxiv","version":2}},"canonical_sha256":"8f5d8842f7e3d272d73ba993d60aee9a62260f328398a1273f7e0fb83b2c4bb0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8f5d8842f7e3d272d73ba993d60aee9a62260f328398a1273f7e0fb83b2c4bb0","first_computed_at":"2026-05-18T02:10:03.183106Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:10:03.183106Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"1hen5F8oZ0b7R8W/B3GPssE3Ik3f7y5Sn7qlisqGY6z5O/59USPC9lhIRscErH6RPlImcZ2jt8Unj1in0yLQBA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:10:03.183521Z","signed_message":"canonical_sha256_bytes"},"source_id":"1001.1614","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:62354d5cb91d6fa2a8870016b87fc671fe3dc0b83a3e5189672f7a6d36eb100d","sha256:acf8b453b2a88441aaa107c48879af35099ab26749baafa4d723ae06a97686bf"],"state_sha256":"953cd191f9426ee2d058677d4510c6df6abbf0deda455a5cd8a538f4d9c5a81c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JKmcH/5VhIHdWLgmxFsyqGrQXWbCBsJUUOgxxt45zG5CGgSh9nVlGHWAnwv4dmfpMzSu4WhUEhX5cjADBLwiAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T08:54:33.920400Z","bundle_sha256":"b873eb6cacac0cf8e29c597dc8f2c8c8ca37ec9b6ce9024b0afc6a97b62dbef4"}}