{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2008:FTBW6XS4XWSUVNKAVSQ4LUWO4N","short_pith_number":"pith:FTBW6XS4","schema_version":"1.0","canonical_sha256":"2cc36f5e5cbda54ab540aca1c5d2cee360a48438f1f8c08870d5ebfc4b1631a1","source":{"kind":"arxiv","id":"0806.2652","version":4},"attestation_state":"computed","paper":{"title":"Origin of the spin density wave instability in AFe$_2$As$_2$ (A=Ba, Sr) as revealed by optical spectroscopy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"G. F. Chen, G. Li, J. Dong, J. L. Luo, N. L. Wang, P. Zheng, W. Z. Hu, Z. Li","submitted_at":"2008-06-16T19:52:20Z","abstract_excerpt":"We performed optical spectroscopy measurement on single crystals of BaFe$_2$As$_2$ and SrFe$_2$As$_2$, the parent compounds of FeAs based superconductors. Both are found to be quite metallic with fairly large plasma frequencies at high temperature. Upon entering the spin-density-wave (SDW) state, formation of partial energy gaps was clearly observed with the presence of surprisingly two different energy scales. A large part of the Drude component was removed by the gapping of Fermi surfaces (FS). Meanwhile, the carrier scattering rate was even more dramatically reduced. We elaborate that the S"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"0806.2652","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-06-16T19:52:20Z","cross_cats_sorted":[],"title_canon_sha256":"00308eceb63689438971718054d9c66c9cda4bd914fa485c2b3feaa39af94ee8","abstract_canon_sha256":"798581f83ed3d8015c5e17fe1debe2fd58e3210100257015e017ff49ba020ee8"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:11:18.137374Z","signature_b64":"kjd62b9qQ4HRh5rMHBEngkPQIY5ZnpSPNl8cBDfnCZI5OtfMdF9IG3Xe+lVoJcj1Fi/C6n0ZsIIBMjrkWxuBBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2cc36f5e5cbda54ab540aca1c5d2cee360a48438f1f8c08870d5ebfc4b1631a1","last_reissued_at":"2026-07-04T17:11:18.137011Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:11:18.137011Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Origin of the spin density wave instability in AFe$_2$As$_2$ (A=Ba, Sr) as revealed by optical spectroscopy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"G. F. Chen, G. Li, J. Dong, J. L. Luo, N. L. Wang, P. Zheng, W. Z. Hu, Z. Li","submitted_at":"2008-06-16T19:52:20Z","abstract_excerpt":"We performed optical spectroscopy measurement on single crystals of BaFe$_2$As$_2$ and SrFe$_2$As$_2$, the parent compounds of FeAs based superconductors. Both are found to be quite metallic with fairly large plasma frequencies at high temperature. Upon entering the spin-density-wave (SDW) state, formation of partial energy gaps was clearly observed with the presence of surprisingly two different energy scales. A large part of the Drude component was removed by the gapping of Fermi surfaces (FS). Meanwhile, the carrier scattering rate was even more dramatically reduced. We elaborate that the S"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0806.2652","kind":"arxiv","version":4},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0806.2652/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"0806.2652","created_at":"2026-07-04T17:11:18.137066+00:00"},{"alias_kind":"arxiv_version","alias_value":"0806.2652v4","created_at":"2026-07-04T17:11:18.137066+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0806.2652","created_at":"2026-07-04T17:11:18.137066+00:00"},{"alias_kind":"pith_short_12","alias_value":"FTBW6XS4XWSU","created_at":"2026-07-04T17:11:18.137066+00:00"},{"alias_kind":"pith_short_16","alias_value":"FTBW6XS4XWSUVNKA","created_at":"2026-07-04T17:11:18.137066+00:00"},{"alias_kind":"pith_short_8","alias_value":"FTBW6XS4","created_at":"2026-07-04T17:11:18.137066+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/FTBW6XS4XWSUVNKAVSQ4LUWO4N","json":"https://pith.science/pith/FTBW6XS4XWSUVNKAVSQ4LUWO4N.json","graph_json":"https://pith.science/api/pith-number/FTBW6XS4XWSUVNKAVSQ4LUWO4N/graph.json","events_json":"https://pith.science/api/pith-number/FTBW6XS4XWSUVNKAVSQ4LUWO4N/events.json","paper":"https://pith.science/paper/FTBW6XS4"},"agent_actions":{"view_html":"https://pith.science/pith/FTBW6XS4XWSUVNKAVSQ4LUWO4N","download_json":"https://pith.science/pith/FTBW6XS4XWSUVNKAVSQ4LUWO4N.json","view_paper":"https://pith.science/paper/FTBW6XS4","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0806.2652&json=true","fetch_graph":"https://pith.science/api/pith-number/FTBW6XS4XWSUVNKAVSQ4LUWO4N/graph.json","fetch_events":"https://pith.science/api/pith-number/FTBW6XS4XWSUVNKAVSQ4LUWO4N/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/FTBW6XS4XWSUVNKAVSQ4LUWO4N/action/timestamp_anchor","attest_storage":"https://pith.science/pith/FTBW6XS4XWSUVNKAVSQ4LUWO4N/action/storage_attestation","attest_author":"https://pith.science/pith/FTBW6XS4XWSUVNKAVSQ4LUWO4N/action/author_attestation","sign_citation":"https://pith.science/pith/FTBW6XS4XWSUVNKAVSQ4LUWO4N/action/citation_signature","submit_replication":"https://pith.science/pith/FTBW6XS4XWSUVNKAVSQ4LUWO4N/action/replication_record"}},"created_at":"2026-07-04T17:11:18.137066+00:00","updated_at":"2026-07-04T17:11:18.137066+00:00"}