{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:K3FVDUD6LYMTLD7LF3NPB3JNDD","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":"9234243efc609b483ffee7821359489f9668b4082901f287e99838eff52421cd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2022-06-05T17:34:50Z","title_canon_sha256":"484b9a9fb351f1cbd498f01d17e8b84839f857b7c4d7adadeea640f373adb529"},"schema_version":"1.0","source":{"id":"2206.02223","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2206.02223","created_at":"2026-07-05T04:29:15Z"},{"alias_kind":"arxiv_version","alias_value":"2206.02223v1","created_at":"2026-07-05T04:29:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2206.02223","created_at":"2026-07-05T04:29:15Z"},{"alias_kind":"pith_short_12","alias_value":"K3FVDUD6LYMT","created_at":"2026-07-05T04:29:15Z"},{"alias_kind":"pith_short_16","alias_value":"K3FVDUD6LYMTLD7L","created_at":"2026-07-05T04:29:15Z"},{"alias_kind":"pith_short_8","alias_value":"K3FVDUD6","created_at":"2026-07-05T04:29:15Z"}],"graph_snapshots":[{"event_id":"sha256:e4a841df684f17fe68bce75a2deb1509134c392c636a30fe15ea4ea8d3af5903","target":"graph","created_at":"2026-07-05T04:29:15Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2206.02223/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Time-dependent femtosecond pump-probe spectroscopic ellipsometry studies on zincblende gallium-nitride (zb-GaN) are performed and analyzed between 2.9-3.7eV. An ultra-fast change of the absorption onset (3.23eV for zb-GaN) is observed by investigating the imaginary part of the dielectric function. The 266nm (4.66eV) pump pulses induce a large free-carrier concentration up to $4\\times 10^{20}$cm$^{-3}$, influencing the transition energy between conduction and valence bands due to many-body effects, like band filling and band gap renormalization, up to $\\approx$500meV. Additionally, the absorpti","authors_text":"Donat J. As, Elias Baron, Jakob Andreasson, Martin Feneberg, Martin Zahradn\\'ik, Mateusz Rebarz, Michael Deppe, R\\\"udiger Goldhahn, Shirly Espinoza","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2022-06-05T17:34:50Z","title":"Femtosecond pump-probe absorption edge spectroscopy of cubic GaN"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2206.02223","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:c874276dee863f6012ccd8eb892bf153e39fd72f8dba55f9df0e47e5842dde98","target":"record","created_at":"2026-07-05T04:29:15Z","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":"9234243efc609b483ffee7821359489f9668b4082901f287e99838eff52421cd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2022-06-05T17:34:50Z","title_canon_sha256":"484b9a9fb351f1cbd498f01d17e8b84839f857b7c4d7adadeea640f373adb529"},"schema_version":"1.0","source":{"id":"2206.02223","kind":"arxiv","version":1}},"canonical_sha256":"56cb51d07e5e19358feb2edaf0ed2d18f2b993a71a9f12d27082fb608b042008","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"56cb51d07e5e19358feb2edaf0ed2d18f2b993a71a9f12d27082fb608b042008","first_computed_at":"2026-07-05T04:29:15.572068Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:29:15.572068Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ejpjrJ7EDxjqD3YDmFfIR6kTzpMSmdOiR/jDHfwS7fk3quqDYSKEJtB/aldpS0JKkFEaLv4KNPvKU971dg8ODA==","signature_status":"signed_v1","signed_at":"2026-07-05T04:29:15.572439Z","signed_message":"canonical_sha256_bytes"},"source_id":"2206.02223","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c874276dee863f6012ccd8eb892bf153e39fd72f8dba55f9df0e47e5842dde98","sha256:e4a841df684f17fe68bce75a2deb1509134c392c636a30fe15ea4ea8d3af5903"],"state_sha256":"1f091a95ee901b929d21a765dcc6d297c99b9b82d21cc694adf1b681456dcedc"}