{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:MHZTMQK2ZMZOQSUK3QYIPA3P5O","short_pith_number":"pith:MHZTMQK2","canonical_record":{"source":{"id":"0807.1040","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-07-07T15:29:09Z","cross_cats_sorted":[],"title_canon_sha256":"bf7ff1f16ee85c408a00c70ddf9a4134fe0a36852be2d28a15588d1997c1c8bc","abstract_canon_sha256":"66fe07854aed6378a523ef839baa817ed179c0ad36c5eabceeb0951d5ff3459d"},"schema_version":"1.0"},"canonical_sha256":"61f336415acb32e84a8adc3087836febb05a5b47cb4ceb4f42020eae3fd010e4","source":{"kind":"arxiv","id":"0807.1040","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0807.1040","created_at":"2026-05-18T03:24:18Z"},{"alias_kind":"arxiv_version","alias_value":"0807.1040v1","created_at":"2026-05-18T03:24:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0807.1040","created_at":"2026-05-18T03:24:18Z"},{"alias_kind":"pith_short_12","alias_value":"MHZTMQK2ZMZO","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_16","alias_value":"MHZTMQK2ZMZOQSUK","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_8","alias_value":"MHZTMQK2","created_at":"2026-05-18T12:25:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:MHZTMQK2ZMZOQSUK3QYIPA3P5O","target":"record","payload":{"canonical_record":{"source":{"id":"0807.1040","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-07-07T15:29:09Z","cross_cats_sorted":[],"title_canon_sha256":"bf7ff1f16ee85c408a00c70ddf9a4134fe0a36852be2d28a15588d1997c1c8bc","abstract_canon_sha256":"66fe07854aed6378a523ef839baa817ed179c0ad36c5eabceeb0951d5ff3459d"},"schema_version":"1.0"},"canonical_sha256":"61f336415acb32e84a8adc3087836febb05a5b47cb4ceb4f42020eae3fd010e4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:24:18.469807Z","signature_b64":"Bssb98ROukHH9nrB4TM/aR41T46UNOVW7ND+6Qb0YlOl2sgxg+9iw6d/5ZLKXcrxpFDG+ACiy/ZtW9B+LtCfDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"61f336415acb32e84a8adc3087836febb05a5b47cb4ceb4f42020eae3fd010e4","last_reissued_at":"2026-05-18T03:24:18.469121Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:24:18.469121Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0807.1040","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":"2026-05-18T03:24:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mz/GLpifJJZpnhT2T4iSDjn4N6C7nBcVfHCRB/C5IyueMeaw2LFzJEziIRxYGZDRM7ONDK4RbhBaChmrgzQjAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T07:19:10.559110Z"},"content_sha256":"1b2f59cfe8198f5d6c162370433834b671767ba910ac076aa63a6f7c680277fc","schema_version":"1.0","event_id":"sha256:1b2f59cfe8198f5d6c162370433834b671767ba910ac076aa63a6f7c680277fc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:MHZTMQK2ZMZOQSUK3QYIPA3P5O","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optical spectroscopy of superconducting Ba{0.55}K{0.45}Fe2As2: evidence for strong coupling to low energy bosons","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"D. Huvonen, J.P. Carbotte, J. Yang, N. Ni, P. C. Canfield, S. L. Budko, T. Room, T. Timusk, U. Nagel","submitted_at":"2008-07-07T15:29:09Z","abstract_excerpt":"Optical spectroscopy on single crystals of the new iron arsenide superconductor Ba{0.55}K{0.45}Fe2As2 shows that the infrared spectrum consists of two major components: a strong metallic Drude band and a well separated mid infrared absorption centered at 0.7 eV. It is difficult to separate the two components unambiguously but several fits of Lorentzian peaks suggest a model with a Drude peak having a plasma frequency of 1.8 to 2.1 eV and a midinfrared peak with a plasma frequency of 2.5 eV. In contrast to the cuprate superconductors the scattering rate obtained from the extended Drude model sa"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0807.1040","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":"2026-05-18T03:24:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"50ATb7uaOqTH1B/zYy25WCScjtxN+9X8xIUxCE1n1LykZ9r7PU6nTAffzEKwyFYrCg3gtPvGkGbCBhsx/HSLCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T07:19:10.559467Z"},"content_sha256":"29df97d004d161d983ab1cdf8312343c03ba84370aaa34b58f0ca87f2169790a","schema_version":"1.0","event_id":"sha256:29df97d004d161d983ab1cdf8312343c03ba84370aaa34b58f0ca87f2169790a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MHZTMQK2ZMZOQSUK3QYIPA3P5O/bundle.json","state_url":"https://pith.science/pith/MHZTMQK2ZMZOQSUK3QYIPA3P5O/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MHZTMQK2ZMZOQSUK3QYIPA3P5O/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":"2026-05-28T07:19:10Z","links":{"resolver":"https://pith.science/pith/MHZTMQK2ZMZOQSUK3QYIPA3P5O","bundle":"https://pith.science/pith/MHZTMQK2ZMZOQSUK3QYIPA3P5O/bundle.json","state":"https://pith.science/pith/MHZTMQK2ZMZOQSUK3QYIPA3P5O/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MHZTMQK2ZMZOQSUK3QYIPA3P5O/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:MHZTMQK2ZMZOQSUK3QYIPA3P5O","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":"66fe07854aed6378a523ef839baa817ed179c0ad36c5eabceeb0951d5ff3459d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-07-07T15:29:09Z","title_canon_sha256":"bf7ff1f16ee85c408a00c70ddf9a4134fe0a36852be2d28a15588d1997c1c8bc"},"schema_version":"1.0","source":{"id":"0807.1040","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0807.1040","created_at":"2026-05-18T03:24:18Z"},{"alias_kind":"arxiv_version","alias_value":"0807.1040v1","created_at":"2026-05-18T03:24:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0807.1040","created_at":"2026-05-18T03:24:18Z"},{"alias_kind":"pith_short_12","alias_value":"MHZTMQK2ZMZO","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_16","alias_value":"MHZTMQK2ZMZOQSUK","created_at":"2026-05-18T12:25:57Z"},{"alias_kind":"pith_short_8","alias_value":"MHZTMQK2","created_at":"2026-05-18T12:25:57Z"}],"graph_snapshots":[{"event_id":"sha256:29df97d004d161d983ab1cdf8312343c03ba84370aaa34b58f0ca87f2169790a","target":"graph","created_at":"2026-05-18T03:24:18Z","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":"Optical spectroscopy on single crystals of the new iron arsenide superconductor Ba{0.55}K{0.45}Fe2As2 shows that the infrared spectrum consists of two major components: a strong metallic Drude band and a well separated mid infrared absorption centered at 0.7 eV. It is difficult to separate the two components unambiguously but several fits of Lorentzian peaks suggest a model with a Drude peak having a plasma frequency of 1.8 to 2.1 eV and a midinfrared peak with a plasma frequency of 2.5 eV. In contrast to the cuprate superconductors the scattering rate obtained from the extended Drude model sa","authors_text":"D. Huvonen, J.P. Carbotte, J. Yang, N. Ni, P. C. Canfield, S. L. Budko, T. Room, T. Timusk, U. Nagel","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-07-07T15:29:09Z","title":"Optical spectroscopy of superconducting Ba{0.55}K{0.45}Fe2As2: evidence for strong coupling to low energy bosons"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0807.1040","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":"sha256:1b2f59cfe8198f5d6c162370433834b671767ba910ac076aa63a6f7c680277fc","target":"record","created_at":"2026-05-18T03:24:18Z","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":"66fe07854aed6378a523ef839baa817ed179c0ad36c5eabceeb0951d5ff3459d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-07-07T15:29:09Z","title_canon_sha256":"bf7ff1f16ee85c408a00c70ddf9a4134fe0a36852be2d28a15588d1997c1c8bc"},"schema_version":"1.0","source":{"id":"0807.1040","kind":"arxiv","version":1}},"canonical_sha256":"61f336415acb32e84a8adc3087836febb05a5b47cb4ceb4f42020eae3fd010e4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"61f336415acb32e84a8adc3087836febb05a5b47cb4ceb4f42020eae3fd010e4","first_computed_at":"2026-05-18T03:24:18.469121Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:24:18.469121Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Bssb98ROukHH9nrB4TM/aR41T46UNOVW7ND+6Qb0YlOl2sgxg+9iw6d/5ZLKXcrxpFDG+ACiy/ZtW9B+LtCfDA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:24:18.469807Z","signed_message":"canonical_sha256_bytes"},"source_id":"0807.1040","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1b2f59cfe8198f5d6c162370433834b671767ba910ac076aa63a6f7c680277fc","sha256:29df97d004d161d983ab1cdf8312343c03ba84370aaa34b58f0ca87f2169790a"],"state_sha256":"9118d979138bbd142463895a2ed33324b60b0a668c5c1b6c7a1b6217e46777ef"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VU9v1S/LMnUipnHKy/KjaHR4lfx69HrKYq9SqMm+fQyfmm9355IPBBVAYfKXCJkFTbNAZWydH8+7OTAYFSVNBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T07:19:10.561415Z","bundle_sha256":"90b8ca00ecce4abc37dabdffbc2c1d47408e1fe8ced02696345ac800b5497a24"}}