{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:TNUOD2SSKNUXQENT7SGSVF5TBT","short_pith_number":"pith:TNUOD2SS","canonical_record":{"source":{"id":"0804.4290","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-04-28T07:29:45Z","cross_cats_sorted":[],"title_canon_sha256":"70a407091cc901343eea41808d801a321a49598ad9fff778b8cef6da306e28b7","abstract_canon_sha256":"efaeedbc28cefc1af7d83c5e9424ed5c57efb6d2f5cd5b84a26456ed736be707"},"schema_version":"1.0"},"canonical_sha256":"9b68e1ea5253697811b3fc8d2a97b30cc79f99f1cdfbb749d06cdb06d14e7354","source":{"kind":"arxiv","id":"0804.4290","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0804.4290","created_at":"2026-07-04T15:14:10Z"},{"alias_kind":"arxiv_version","alias_value":"0804.4290v2","created_at":"2026-07-04T15:14:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0804.4290","created_at":"2026-07-04T15:14:10Z"},{"alias_kind":"pith_short_12","alias_value":"TNUOD2SSKNUX","created_at":"2026-07-04T15:14:10Z"},{"alias_kind":"pith_short_16","alias_value":"TNUOD2SSKNUXQENT","created_at":"2026-07-04T15:14:10Z"},{"alias_kind":"pith_short_8","alias_value":"TNUOD2SS","created_at":"2026-07-04T15:14:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:TNUOD2SSKNUXQENT7SGSVF5TBT","target":"record","payload":{"canonical_record":{"source":{"id":"0804.4290","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-04-28T07:29:45Z","cross_cats_sorted":[],"title_canon_sha256":"70a407091cc901343eea41808d801a321a49598ad9fff778b8cef6da306e28b7","abstract_canon_sha256":"efaeedbc28cefc1af7d83c5e9424ed5c57efb6d2f5cd5b84a26456ed736be707"},"schema_version":"1.0"},"canonical_sha256":"9b68e1ea5253697811b3fc8d2a97b30cc79f99f1cdfbb749d06cdb06d14e7354","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T15:14:10.449705Z","signature_b64":"59VMAGQdGywr0CRpx5EoIdGPovpkL09gTUX6Glp750OiPEUl17h8IeQur+tVY/V3I/peoUS2T+QMN2OitlhXBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9b68e1ea5253697811b3fc8d2a97b30cc79f99f1cdfbb749d06cdb06d14e7354","last_reissued_at":"2026-07-04T15:14:10.449335Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T15:14:10.449335Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0804.4290","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":"2026-07-04T15:14:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"97ThUA3ebE/lRiu8UWQGxSRtf09fUBSSWYsQsSQJ8xUC0yj6ctzU31kGzxNZWdTmbMc0JDLJYwL8dMwc4owZBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T15:50:03.408251Z"},"content_sha256":"7d94212a2425f09fba0565632beac6a1c1b2d0131b7ab48b17d56dbd3b222de3","schema_version":"1.0","event_id":"sha256:7d94212a2425f09fba0565632beac6a1c1b2d0131b7ab48b17d56dbd3b222de3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:TNUOD2SSKNUXQENT7SGSVF5TBT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Thorium-doping induced superconductivity up to 56 K in Gd1-xThxFeAsO","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"Cao Wang, Guanghan Cao, Linjun Li, Shuai Jiang, Shun Chi, Xiangfan Xu, Xiao Lin, Yongkang Luo, Yuetao Wang, Yuke Li, Zengwei Zhu, Zhi Ren, Zhu'an Xu","submitted_at":"2008-04-28T07:29:45Z","abstract_excerpt":"Following the discovery of superconductivity in an iron-based arsenide LaO1-xFxFeAs with a superconducting transition temperature (Tc) of 26 K[1], Tc was pushed up surprisingly to above 40 K by either applying pressure[2] or replacing La with Sm[3], Ce[4], Nd[5] and Pr[6]. The maximum Tc has climbed to 55 K, observed in SmO1-xFxFeAs[7, 8] and SmFeAsO1-x[9]. The value of Tc was found to increase with decreasing lattice parameters in LnFeAsO1-xFx (Ln stands for the lanthanide elements) at an apparently optimal doping level. However, the F- doping in GdFeAsO is particularly difficult[10,11] due t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0804.4290","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0804.4290/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T15:14:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+gbDS1Ir9ei+aNcGa1oZNBbYzIbqVZ40U0oO9def2tvkz2TFMMeu6tWRmhh+5lbv0mHHYPitXZmkw6tXmFonDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T15:50:03.408760Z"},"content_sha256":"73b9c9e6f850f08eceec2874b13d7a39764f4977a3ab6d915f7c42f9cedb02d3","schema_version":"1.0","event_id":"sha256:73b9c9e6f850f08eceec2874b13d7a39764f4977a3ab6d915f7c42f9cedb02d3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TNUOD2SSKNUXQENT7SGSVF5TBT/bundle.json","state_url":"https://pith.science/pith/TNUOD2SSKNUXQENT7SGSVF5TBT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TNUOD2SSKNUXQENT7SGSVF5TBT/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":"2026-08-06T15:50:03Z","links":{"resolver":"https://pith.science/pith/TNUOD2SSKNUXQENT7SGSVF5TBT","bundle":"https://pith.science/pith/TNUOD2SSKNUXQENT7SGSVF5TBT/bundle.json","state":"https://pith.science/pith/TNUOD2SSKNUXQENT7SGSVF5TBT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TNUOD2SSKNUXQENT7SGSVF5TBT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:TNUOD2SSKNUXQENT7SGSVF5TBT","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":"efaeedbc28cefc1af7d83c5e9424ed5c57efb6d2f5cd5b84a26456ed736be707","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-04-28T07:29:45Z","title_canon_sha256":"70a407091cc901343eea41808d801a321a49598ad9fff778b8cef6da306e28b7"},"schema_version":"1.0","source":{"id":"0804.4290","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0804.4290","created_at":"2026-07-04T15:14:10Z"},{"alias_kind":"arxiv_version","alias_value":"0804.4290v2","created_at":"2026-07-04T15:14:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0804.4290","created_at":"2026-07-04T15:14:10Z"},{"alias_kind":"pith_short_12","alias_value":"TNUOD2SSKNUX","created_at":"2026-07-04T15:14:10Z"},{"alias_kind":"pith_short_16","alias_value":"TNUOD2SSKNUXQENT","created_at":"2026-07-04T15:14:10Z"},{"alias_kind":"pith_short_8","alias_value":"TNUOD2SS","created_at":"2026-07-04T15:14:10Z"}],"graph_snapshots":[{"event_id":"sha256:73b9c9e6f850f08eceec2874b13d7a39764f4977a3ab6d915f7c42f9cedb02d3","target":"graph","created_at":"2026-07-04T15:14:10Z","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/0804.4290/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Following the discovery of superconductivity in an iron-based arsenide LaO1-xFxFeAs with a superconducting transition temperature (Tc) of 26 K[1], Tc was pushed up surprisingly to above 40 K by either applying pressure[2] or replacing La with Sm[3], Ce[4], Nd[5] and Pr[6]. The maximum Tc has climbed to 55 K, observed in SmO1-xFxFeAs[7, 8] and SmFeAsO1-x[9]. The value of Tc was found to increase with decreasing lattice parameters in LnFeAsO1-xFx (Ln stands for the lanthanide elements) at an apparently optimal doping level. However, the F- doping in GdFeAsO is particularly difficult[10,11] due t","authors_text":"Cao Wang, Guanghan Cao, Linjun Li, Shuai Jiang, Shun Chi, Xiangfan Xu, Xiao Lin, Yongkang Luo, Yuetao Wang, Yuke Li, Zengwei Zhu, Zhi Ren, Zhu'an Xu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-04-28T07:29:45Z","title":"Thorium-doping induced superconductivity up to 56 K in Gd1-xThxFeAsO"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0804.4290","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":"sha256:7d94212a2425f09fba0565632beac6a1c1b2d0131b7ab48b17d56dbd3b222de3","target":"record","created_at":"2026-07-04T15:14:10Z","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":"efaeedbc28cefc1af7d83c5e9424ed5c57efb6d2f5cd5b84a26456ed736be707","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2008-04-28T07:29:45Z","title_canon_sha256":"70a407091cc901343eea41808d801a321a49598ad9fff778b8cef6da306e28b7"},"schema_version":"1.0","source":{"id":"0804.4290","kind":"arxiv","version":2}},"canonical_sha256":"9b68e1ea5253697811b3fc8d2a97b30cc79f99f1cdfbb749d06cdb06d14e7354","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9b68e1ea5253697811b3fc8d2a97b30cc79f99f1cdfbb749d06cdb06d14e7354","first_computed_at":"2026-07-04T15:14:10.449335Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T15:14:10.449335Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"59VMAGQdGywr0CRpx5EoIdGPovpkL09gTUX6Glp750OiPEUl17h8IeQur+tVY/V3I/peoUS2T+QMN2OitlhXBg==","signature_status":"signed_v1","signed_at":"2026-07-04T15:14:10.449705Z","signed_message":"canonical_sha256_bytes"},"source_id":"0804.4290","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7d94212a2425f09fba0565632beac6a1c1b2d0131b7ab48b17d56dbd3b222de3","sha256:73b9c9e6f850f08eceec2874b13d7a39764f4977a3ab6d915f7c42f9cedb02d3"],"state_sha256":"ca9919484d3978afad18a2b09754dc329c7b06a64bd0e400cdcc7885974a34fb"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mLSLeY5hLvaNUAbjMRFSgS9MBDOZHcwJuu4XIzbRWs4pyi6efsVh6A+U1gEEKM2sQgrBO7mzBdZ4VDmeOGPmAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T15:50:03.414385Z","bundle_sha256":"7a332a4043e7ae116b002f3d88817ba830304edb6ad09914ea5c0b8eaed87a69"}}