{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:YSTVYWWBWZS4OQ2GWXD45BSDJB","short_pith_number":"pith:YSTVYWWB","canonical_record":{"source":{"id":"1506.00032","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-05-29T21:16:08Z","cross_cats_sorted":[],"title_canon_sha256":"f03c6283d86da62ab814a6c52f53bfdfce319c17f074a295382508bd200aff8e","abstract_canon_sha256":"6cd55a006b6f4bfa2c5b750992d8f17aa72da9cd7e2156f0b8d52e9a37b8f197"},"schema_version":"1.0"},"canonical_sha256":"c4a75c5ac1b665c74346b5c7ce86434846ef266eace57157f63621da2879688f","source":{"kind":"arxiv","id":"1506.00032","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1506.00032","created_at":"2026-05-18T01:23:03Z"},{"alias_kind":"arxiv_version","alias_value":"1506.00032v1","created_at":"2026-05-18T01:23:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1506.00032","created_at":"2026-05-18T01:23:03Z"},{"alias_kind":"pith_short_12","alias_value":"YSTVYWWBWZS4","created_at":"2026-05-18T12:29:52Z"},{"alias_kind":"pith_short_16","alias_value":"YSTVYWWBWZS4OQ2G","created_at":"2026-05-18T12:29:52Z"},{"alias_kind":"pith_short_8","alias_value":"YSTVYWWB","created_at":"2026-05-18T12:29:52Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:YSTVYWWBWZS4OQ2GWXD45BSDJB","target":"record","payload":{"canonical_record":{"source":{"id":"1506.00032","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-05-29T21:16:08Z","cross_cats_sorted":[],"title_canon_sha256":"f03c6283d86da62ab814a6c52f53bfdfce319c17f074a295382508bd200aff8e","abstract_canon_sha256":"6cd55a006b6f4bfa2c5b750992d8f17aa72da9cd7e2156f0b8d52e9a37b8f197"},"schema_version":"1.0"},"canonical_sha256":"c4a75c5ac1b665c74346b5c7ce86434846ef266eace57157f63621da2879688f","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:23:03.966579Z","signature_b64":"GVuyBEaSyArwNLO8B7ARxipUvDBmkg76giOhrzauzMfI23V6qM3qQNOPbdSdVMvJZDJIyyTX1pPJM0Jrg6M1Dg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c4a75c5ac1b665c74346b5c7ce86434846ef266eace57157f63621da2879688f","last_reissued_at":"2026-05-18T01:23:03.966070Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:23:03.966070Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1506.00032","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":"2026-05-18T01:23:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7/QeYHd0YCcRnOBo2eDLiK01XhhxNBeie4flsC1NCzCvr7Awjcts4oy4kZldPFcKIJUW8/OwTBoQurb2VtwbDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T04:59:59.982025Z"},"content_sha256":"46e9ed9c53b5fda9c1d98d3e4eabe0145dcc980bb506b9a3911260b824712c29","schema_version":"1.0","event_id":"sha256:46e9ed9c53b5fda9c1d98d3e4eabe0145dcc980bb506b9a3911260b824712c29"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:YSTVYWWBWZS4OQ2GWXD45BSDJB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Strongly bound excitons dominate electronic relaxation in resonantly excited twisted bilayer graphene","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Hiral Patel, Jiwoong Park, Li Yang, Lola Brown, Matt W. Graham, Yufeng Liang","submitted_at":"2015-05-29T21:16:08Z","abstract_excerpt":"When two sheets of graphene stack in a twisted bilayer graphene (tBLG) configuration, the resulting constrained overlap between interplanar 2p orbitals produce angle-tunable electronic absorption resonances. Using a novel combination of multiphoton transient absorption (TA) microscopy and TEM, we resolve the resonant electronic structure, and ensuing electronic relaxation inside single tBLG domains. Strikingly, we find that the transient electronic population in resonantly excited tBLG domains is enhanced many fold, forming a major electronic relaxation bottleneck. 2-photon TA microscopy shows"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.00032","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":"2026-05-18T01:23:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"j4IVQ3vpcfn728F723GoZ9Vcg936L0Tjfp9kIbZ9LbCc5L6GoX8upoxQaJvVRNOzgphVJwxBk/2X+KeXf0OJAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T04:59:59.982574Z"},"content_sha256":"b3e5c6b00946dc32d1c88464e4ef5fbb8536f9c2a8a179dbebe9cd52d3d13e69","schema_version":"1.0","event_id":"sha256:b3e5c6b00946dc32d1c88464e4ef5fbb8536f9c2a8a179dbebe9cd52d3d13e69"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YSTVYWWBWZS4OQ2GWXD45BSDJB/bundle.json","state_url":"https://pith.science/pith/YSTVYWWBWZS4OQ2GWXD45BSDJB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YSTVYWWBWZS4OQ2GWXD45BSDJB/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":"2026-06-09T04:59:59Z","links":{"resolver":"https://pith.science/pith/YSTVYWWBWZS4OQ2GWXD45BSDJB","bundle":"https://pith.science/pith/YSTVYWWBWZS4OQ2GWXD45BSDJB/bundle.json","state":"https://pith.science/pith/YSTVYWWBWZS4OQ2GWXD45BSDJB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YSTVYWWBWZS4OQ2GWXD45BSDJB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:YSTVYWWBWZS4OQ2GWXD45BSDJB","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":"6cd55a006b6f4bfa2c5b750992d8f17aa72da9cd7e2156f0b8d52e9a37b8f197","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-05-29T21:16:08Z","title_canon_sha256":"f03c6283d86da62ab814a6c52f53bfdfce319c17f074a295382508bd200aff8e"},"schema_version":"1.0","source":{"id":"1506.00032","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1506.00032","created_at":"2026-05-18T01:23:03Z"},{"alias_kind":"arxiv_version","alias_value":"1506.00032v1","created_at":"2026-05-18T01:23:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1506.00032","created_at":"2026-05-18T01:23:03Z"},{"alias_kind":"pith_short_12","alias_value":"YSTVYWWBWZS4","created_at":"2026-05-18T12:29:52Z"},{"alias_kind":"pith_short_16","alias_value":"YSTVYWWBWZS4OQ2G","created_at":"2026-05-18T12:29:52Z"},{"alias_kind":"pith_short_8","alias_value":"YSTVYWWB","created_at":"2026-05-18T12:29:52Z"}],"graph_snapshots":[{"event_id":"sha256:b3e5c6b00946dc32d1c88464e4ef5fbb8536f9c2a8a179dbebe9cd52d3d13e69","target":"graph","created_at":"2026-05-18T01:23:03Z","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":"When two sheets of graphene stack in a twisted bilayer graphene (tBLG) configuration, the resulting constrained overlap between interplanar 2p orbitals produce angle-tunable electronic absorption resonances. Using a novel combination of multiphoton transient absorption (TA) microscopy and TEM, we resolve the resonant electronic structure, and ensuing electronic relaxation inside single tBLG domains. Strikingly, we find that the transient electronic population in resonantly excited tBLG domains is enhanced many fold, forming a major electronic relaxation bottleneck. 2-photon TA microscopy shows","authors_text":"Hiral Patel, Jiwoong Park, Li Yang, Lola Brown, Matt W. Graham, Yufeng Liang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-05-29T21:16:08Z","title":"Strongly bound excitons dominate electronic relaxation in resonantly excited twisted bilayer graphene"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1506.00032","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":"sha256:46e9ed9c53b5fda9c1d98d3e4eabe0145dcc980bb506b9a3911260b824712c29","target":"record","created_at":"2026-05-18T01:23:03Z","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":"6cd55a006b6f4bfa2c5b750992d8f17aa72da9cd7e2156f0b8d52e9a37b8f197","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-05-29T21:16:08Z","title_canon_sha256":"f03c6283d86da62ab814a6c52f53bfdfce319c17f074a295382508bd200aff8e"},"schema_version":"1.0","source":{"id":"1506.00032","kind":"arxiv","version":1}},"canonical_sha256":"c4a75c5ac1b665c74346b5c7ce86434846ef266eace57157f63621da2879688f","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c4a75c5ac1b665c74346b5c7ce86434846ef266eace57157f63621da2879688f","first_computed_at":"2026-05-18T01:23:03.966070Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:23:03.966070Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GVuyBEaSyArwNLO8B7ARxipUvDBmkg76giOhrzauzMfI23V6qM3qQNOPbdSdVMvJZDJIyyTX1pPJM0Jrg6M1Dg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:23:03.966579Z","signed_message":"canonical_sha256_bytes"},"source_id":"1506.00032","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:46e9ed9c53b5fda9c1d98d3e4eabe0145dcc980bb506b9a3911260b824712c29","sha256:b3e5c6b00946dc32d1c88464e4ef5fbb8536f9c2a8a179dbebe9cd52d3d13e69"],"state_sha256":"404a18241855989e8723d4d742f34767b9d344b03b4b220f5b0c2c349da44d4a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0B6qAHSnFubTUeObd3OieDcVuCji527OL1GQFMNOosR6WpLPnpvUOnfB7cq/+Ordwh+sGUojGRJBL6NvYR14DQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T04:59:59.985737Z","bundle_sha256":"8134b228e9ea524803e9169a6506e72ec552b1b868ae11b0a78389b68e77528a"}}