{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:RT4K4HKI75P3UTHVVCMAQGIBOB","short_pith_number":"pith:RT4K4HKI","canonical_record":{"source":{"id":"1104.3814","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2011-04-19T17:48:09Z","cross_cats_sorted":[],"title_canon_sha256":"ec6c1da3cf512440f5b71738761735c20f61ef9223ff4520401f1cbb04715549","abstract_canon_sha256":"502ffa5e64856f8e8c36113d4a50d0c4ae58c77672a3f6740f17c820216b0551"},"schema_version":"1.0"},"canonical_sha256":"8cf8ae1d48ff5fba4cf5a898081901704059b8e5d13f841ac0c7026d447e9eb2","source":{"kind":"arxiv","id":"1104.3814","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1104.3814","created_at":"2026-05-18T03:54:15Z"},{"alias_kind":"arxiv_version","alias_value":"1104.3814v1","created_at":"2026-05-18T03:54:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1104.3814","created_at":"2026-05-18T03:54:15Z"},{"alias_kind":"pith_short_12","alias_value":"RT4K4HKI75P3","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_16","alias_value":"RT4K4HKI75P3UTHV","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_8","alias_value":"RT4K4HKI","created_at":"2026-05-18T12:26:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:RT4K4HKI75P3UTHVVCMAQGIBOB","target":"record","payload":{"canonical_record":{"source":{"id":"1104.3814","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2011-04-19T17:48:09Z","cross_cats_sorted":[],"title_canon_sha256":"ec6c1da3cf512440f5b71738761735c20f61ef9223ff4520401f1cbb04715549","abstract_canon_sha256":"502ffa5e64856f8e8c36113d4a50d0c4ae58c77672a3f6740f17c820216b0551"},"schema_version":"1.0"},"canonical_sha256":"8cf8ae1d48ff5fba4cf5a898081901704059b8e5d13f841ac0c7026d447e9eb2","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:54:15.294025Z","signature_b64":"UkNjYldNHBxIaBaksBMbdiHRHyBH/jqs70NHce/L9tTZhrYuwwAZXb29pPAEVgPm9+8LgXVx35pZOKx7gyViCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8cf8ae1d48ff5fba4cf5a898081901704059b8e5d13f841ac0c7026d447e9eb2","last_reissued_at":"2026-05-18T03:54:15.293368Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:54:15.293368Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1104.3814","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":"2026-05-18T03:54:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TZXKcZ0wf8IwQtx6U2YaV08YfCsJiEm0R4RpHZhR/q19ByoqcWoDNtiEmf+tz2jzqkIYZ0LBEBE2leMnEO8EAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T18:52:31.535541Z"},"content_sha256":"41a2a246e4e20852ec6652d98fc2700b5f388f4776920790e0ba2679fd2b1b9f","schema_version":"1.0","event_id":"sha256:41a2a246e4e20852ec6652d98fc2700b5f388f4776920790e0ba2679fd2b1b9f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:RT4K4HKI75P3UTHVVCMAQGIBOB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Characterizing top gated bilayer graphene interaction with its environment by Raman spectroscopy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"D. L. Mafra, F. Mauri, F. Plentz, G. G. Silva, J. A. Leon, L. M. Malard, M. A. Pimenta, P. Gava, R. S. Borges","submitted_at":"2011-04-19T17:48:09Z","abstract_excerpt":"In this work we study the behavior of the optical phonon modes in bilayer graphene devices by applying top gate voltage, using Raman scattering. We observe the splitting of the Raman G band as we tune the Fermi level of the sample, which is explained in terms of mixing of the Raman (Eg) and infrared (Eu) phonon modes, due to different doping in the two layers. We theoretically analyze our data in terms of the bilayer graphene phonon self-energy which includes non-homogeneous charge carrier doping between the graphene layers. We show that the comparison between the experiment and theoretical mo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1104.3814","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":"2026-05-18T03:54:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nSp4dZchfu4i5uhzwQKw6uTnXa97GknCguCSZ7My6e9XooeizR6Zcwtnb60YkWZKvu0kggk0+GMARcJ19RwGAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-20T18:52:31.535889Z"},"content_sha256":"bea9b5b0f28491b86cc97507d117e05544ed6a88783e563a1700a3c0716b5828","schema_version":"1.0","event_id":"sha256:bea9b5b0f28491b86cc97507d117e05544ed6a88783e563a1700a3c0716b5828"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RT4K4HKI75P3UTHVVCMAQGIBOB/bundle.json","state_url":"https://pith.science/pith/RT4K4HKI75P3UTHVVCMAQGIBOB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RT4K4HKI75P3UTHVVCMAQGIBOB/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":"2026-05-20T18:52:31Z","links":{"resolver":"https://pith.science/pith/RT4K4HKI75P3UTHVVCMAQGIBOB","bundle":"https://pith.science/pith/RT4K4HKI75P3UTHVVCMAQGIBOB/bundle.json","state":"https://pith.science/pith/RT4K4HKI75P3UTHVVCMAQGIBOB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RT4K4HKI75P3UTHVVCMAQGIBOB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:RT4K4HKI75P3UTHVVCMAQGIBOB","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":"502ffa5e64856f8e8c36113d4a50d0c4ae58c77672a3f6740f17c820216b0551","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2011-04-19T17:48:09Z","title_canon_sha256":"ec6c1da3cf512440f5b71738761735c20f61ef9223ff4520401f1cbb04715549"},"schema_version":"1.0","source":{"id":"1104.3814","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1104.3814","created_at":"2026-05-18T03:54:15Z"},{"alias_kind":"arxiv_version","alias_value":"1104.3814v1","created_at":"2026-05-18T03:54:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1104.3814","created_at":"2026-05-18T03:54:15Z"},{"alias_kind":"pith_short_12","alias_value":"RT4K4HKI75P3","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_16","alias_value":"RT4K4HKI75P3UTHV","created_at":"2026-05-18T12:26:41Z"},{"alias_kind":"pith_short_8","alias_value":"RT4K4HKI","created_at":"2026-05-18T12:26:41Z"}],"graph_snapshots":[{"event_id":"sha256:bea9b5b0f28491b86cc97507d117e05544ed6a88783e563a1700a3c0716b5828","target":"graph","created_at":"2026-05-18T03:54:15Z","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":"In this work we study the behavior of the optical phonon modes in bilayer graphene devices by applying top gate voltage, using Raman scattering. We observe the splitting of the Raman G band as we tune the Fermi level of the sample, which is explained in terms of mixing of the Raman (Eg) and infrared (Eu) phonon modes, due to different doping in the two layers. We theoretically analyze our data in terms of the bilayer graphene phonon self-energy which includes non-homogeneous charge carrier doping between the graphene layers. We show that the comparison between the experiment and theoretical mo","authors_text":"D. L. Mafra, F. Mauri, F. Plentz, G. G. Silva, J. A. Leon, L. M. Malard, M. A. Pimenta, P. Gava, R. S. Borges","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2011-04-19T17:48:09Z","title":"Characterizing top gated bilayer graphene interaction with its environment by Raman spectroscopy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1104.3814","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":"sha256:41a2a246e4e20852ec6652d98fc2700b5f388f4776920790e0ba2679fd2b1b9f","target":"record","created_at":"2026-05-18T03:54:15Z","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":"502ffa5e64856f8e8c36113d4a50d0c4ae58c77672a3f6740f17c820216b0551","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2011-04-19T17:48:09Z","title_canon_sha256":"ec6c1da3cf512440f5b71738761735c20f61ef9223ff4520401f1cbb04715549"},"schema_version":"1.0","source":{"id":"1104.3814","kind":"arxiv","version":1}},"canonical_sha256":"8cf8ae1d48ff5fba4cf5a898081901704059b8e5d13f841ac0c7026d447e9eb2","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8cf8ae1d48ff5fba4cf5a898081901704059b8e5d13f841ac0c7026d447e9eb2","first_computed_at":"2026-05-18T03:54:15.293368Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:54:15.293368Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"UkNjYldNHBxIaBaksBMbdiHRHyBH/jqs70NHce/L9tTZhrYuwwAZXb29pPAEVgPm9+8LgXVx35pZOKx7gyViCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T03:54:15.294025Z","signed_message":"canonical_sha256_bytes"},"source_id":"1104.3814","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:41a2a246e4e20852ec6652d98fc2700b5f388f4776920790e0ba2679fd2b1b9f","sha256:bea9b5b0f28491b86cc97507d117e05544ed6a88783e563a1700a3c0716b5828"],"state_sha256":"a6c8ada56b91b8f08f62ae832603731c24aacd975448405cd7da17495fa65af1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"H4WkMe+K9dXs+dD+FdCUUKO3C40ShdDnojLQXsr0VR/NIzm2Zlz3mRxiqp89LV9VPNQFiNsI8MxEQwefxiSJCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-20T18:52:31.538808Z","bundle_sha256":"e6c0696e115b5d1098c8e3464f946992dc489f6d9adfdcd6ac37b8d7e454dcba"}}