{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:FIW47ELLP6MPJJSUEMOICTLCPL","short_pith_number":"pith:FIW47ELL","canonical_record":{"source":{"id":"1007.3677","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2010-07-21T15:08:44Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"b6ec2c9cff22472684813d95bfbd3d335d8570084fcc93c72060c625a3e1107a","abstract_canon_sha256":"d84cc775deccbc459797743c670005182bb33e04d6921d751dc3032e5ec1fa40"},"schema_version":"1.0"},"canonical_sha256":"2a2dcf916b7f98f4a654231c814d627adeb15c7b7e6029ba0e7e041c5f3fc2fa","source":{"kind":"arxiv","id":"1007.3677","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1007.3677","created_at":"2026-05-18T03:14:17Z"},{"alias_kind":"arxiv_version","alias_value":"1007.3677v2","created_at":"2026-05-18T03:14:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1007.3677","created_at":"2026-05-18T03:14:17Z"},{"alias_kind":"pith_short_12","alias_value":"FIW47ELLP6MP","created_at":"2026-05-18T12:26:07Z"},{"alias_kind":"pith_short_16","alias_value":"FIW47ELLP6MPJJSU","created_at":"2026-05-18T12:26:07Z"},{"alias_kind":"pith_short_8","alias_value":"FIW47ELL","created_at":"2026-05-18T12:26:07Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:FIW47ELLP6MPJJSUEMOICTLCPL","target":"record","payload":{"canonical_record":{"source":{"id":"1007.3677","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2010-07-21T15:08:44Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"b6ec2c9cff22472684813d95bfbd3d335d8570084fcc93c72060c625a3e1107a","abstract_canon_sha256":"d84cc775deccbc459797743c670005182bb33e04d6921d751dc3032e5ec1fa40"},"schema_version":"1.0"},"canonical_sha256":"2a2dcf916b7f98f4a654231c814d627adeb15c7b7e6029ba0e7e041c5f3fc2fa","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:14:17.864916Z","signature_b64":"bVAcwQ2jgiD0BggnRBrJJWDI+WPhUgS4c9ak3W3r4YzvDtk+5VRxVaGzRfH0hqe5Xr5PjxZz9iR6r6dhpsCkBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2a2dcf916b7f98f4a654231c814d627adeb15c7b7e6029ba0e7e041c5f3fc2fa","last_reissued_at":"2026-05-18T03:14:17.864226Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:14:17.864226Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1007.3677","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:14:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mqgC53LwvULWCEAfCuGtFW0SQH+x/L516NdnMJCeJk8GdSoi1TjayvIha6iVBc6LqWrPyFXK92SlO5crcv8ICA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T20:22:52.909425Z"},"content_sha256":"254dfa880f18f196d04c2fcf1bc99971827c0e1c25054334c8da4b0bba9b2382","schema_version":"1.0","event_id":"sha256:254dfa880f18f196d04c2fcf1bc99971827c0e1c25054334c8da4b0bba9b2382"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:FIW47ELLP6MPJJSUEMOICTLCPL","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Observation of a coherence peak and pair-breaking effects in THz conductivity of BaFe$_{2-2x}$Co$_{2x}$As$_2$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.supr-con","authors_text":"C.B. Eom, D.C. Larbalestier, E.E. Hellstrom, J.D. Weiss, J. Jiang, L.S. Bilbro, N.P. Armitage, R. Vald\\'es Aguilar, S. Lee","submitted_at":"2010-07-21T15:08:44Z","abstract_excerpt":"We report a study of high quality pnictide superconductor BaFe$_{1.84}$Co$_{0.16}$As$_2$ thin films using time-domain THz spectroscopy. Near T$_c$ we find evidence for a coherence peak and qualitative agreement with the weak-coupling Mattis-Bardeen form of the conductivity. At low temperature, we find that the real part of the THz conductivity is not fully suppressed and $\\sigma_2$ is significantly smaller than the Matthis-Bardeen expectation. The temperature dependence of the penetration depth $\\lambda$ follows a power law with an unusually high exponent of 3.1. We interpret these results as "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1007.3677","kind":"arxiv","version":2},"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":"2026-05-18T03:14:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"O+SJWHA65GEUjeWtxjmcGtpv5a9sxU2RVIkVby0glvNUkWGRA9AEzAQGpO5uVEIDkNqeOG+BW27Flgew53aLBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T20:22:52.910113Z"},"content_sha256":"4caa5fef50462e1a61ce977e9bb648d8f05bfdcd7393861c9f52e0e9e6c7de01","schema_version":"1.0","event_id":"sha256:4caa5fef50462e1a61ce977e9bb648d8f05bfdcd7393861c9f52e0e9e6c7de01"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FIW47ELLP6MPJJSUEMOICTLCPL/bundle.json","state_url":"https://pith.science/pith/FIW47ELLP6MPJJSUEMOICTLCPL/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FIW47ELLP6MPJJSUEMOICTLCPL/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":"2026-05-25T20:22:52Z","links":{"resolver":"https://pith.science/pith/FIW47ELLP6MPJJSUEMOICTLCPL","bundle":"https://pith.science/pith/FIW47ELLP6MPJJSUEMOICTLCPL/bundle.json","state":"https://pith.science/pith/FIW47ELLP6MPJJSUEMOICTLCPL/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FIW47ELLP6MPJJSUEMOICTLCPL/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:FIW47ELLP6MPJJSUEMOICTLCPL","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":"d84cc775deccbc459797743c670005182bb33e04d6921d751dc3032e5ec1fa40","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2010-07-21T15:08:44Z","title_canon_sha256":"b6ec2c9cff22472684813d95bfbd3d335d8570084fcc93c72060c625a3e1107a"},"schema_version":"1.0","source":{"id":"1007.3677","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1007.3677","created_at":"2026-05-18T03:14:17Z"},{"alias_kind":"arxiv_version","alias_value":"1007.3677v2","created_at":"2026-05-18T03:14:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1007.3677","created_at":"2026-05-18T03:14:17Z"},{"alias_kind":"pith_short_12","alias_value":"FIW47ELLP6MP","created_at":"2026-05-18T12:26:07Z"},{"alias_kind":"pith_short_16","alias_value":"FIW47ELLP6MPJJSU","created_at":"2026-05-18T12:26:07Z"},{"alias_kind":"pith_short_8","alias_value":"FIW47ELL","created_at":"2026-05-18T12:26:07Z"}],"graph_snapshots":[{"event_id":"sha256:4caa5fef50462e1a61ce977e9bb648d8f05bfdcd7393861c9f52e0e9e6c7de01","target":"graph","created_at":"2026-05-18T03:14:17Z","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":"We report a study of high quality pnictide superconductor BaFe$_{1.84}$Co$_{0.16}$As$_2$ thin films using time-domain THz spectroscopy. Near T$_c$ we find evidence for a coherence peak and qualitative agreement with the weak-coupling Mattis-Bardeen form of the conductivity. At low temperature, we find that the real part of the THz conductivity is not fully suppressed and $\\sigma_2$ is significantly smaller than the Matthis-Bardeen expectation. The temperature dependence of the penetration depth $\\lambda$ follows a power law with an unusually high exponent of 3.1. We interpret these results as ","authors_text":"C.B. Eom, D.C. Larbalestier, E.E. Hellstrom, J.D. Weiss, J. Jiang, L.S. Bilbro, N.P. Armitage, R. Vald\\'es Aguilar, S. Lee","cross_cats":["cond-mat.str-el"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2010-07-21T15:08:44Z","title":"Observation of a coherence peak and pair-breaking effects in THz conductivity of BaFe$_{2-2x}$Co$_{2x}$As$_2$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1007.3677","kind":"arxiv","version":2},"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":"sha256:254dfa880f18f196d04c2fcf1bc99971827c0e1c25054334c8da4b0bba9b2382","target":"record","created_at":"2026-05-18T03:14:17Z","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":"d84cc775deccbc459797743c670005182bb33e04d6921d751dc3032e5ec1fa40","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2010-07-21T15:08:44Z","title_canon_sha256":"b6ec2c9cff22472684813d95bfbd3d335d8570084fcc93c72060c625a3e1107a"},"schema_version":"1.0","source":{"id":"1007.3677","kind":"arxiv","version":2}},"canonical_sha256":"2a2dcf916b7f98f4a654231c814d627adeb15c7b7e6029ba0e7e041c5f3fc2fa","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2a2dcf916b7f98f4a654231c814d627adeb15c7b7e6029ba0e7e041c5f3fc2fa","first_computed_at":"2026-05-18T03:14:17.864226Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:14:17.864226Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bVAcwQ2jgiD0BggnRBrJJWDI+WPhUgS4c9ak3W3r4YzvDtk+5VRxVaGzRfH0hqe5Xr5PjxZz9iR6r6dhpsCkBA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:14:17.864916Z","signed_message":"canonical_sha256_bytes"},"source_id":"1007.3677","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:254dfa880f18f196d04c2fcf1bc99971827c0e1c25054334c8da4b0bba9b2382","sha256:4caa5fef50462e1a61ce977e9bb648d8f05bfdcd7393861c9f52e0e9e6c7de01"],"state_sha256":"0629eb446b5e4f7c386ac42b7fb98d410663fa8f66ac992cd4c387b1820177b1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DyPFolotzhHGX+GyCPXphGlpcUpvs25FTIdMeO/IurXj5SgaxPtoLrkqRkNO7n/39fRdnn0w0PaIBgFbZd40AQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T20:22:52.913701Z","bundle_sha256":"6ac256ad282613580f181b0d878dc689e45d217c18b7f14fac1ed7da7b819ed7"}}