{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:2KFQTN3FRR7WI35S4NQSUTNKX4","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":"07b5f33c0cccc9b7172877bd478d6c9252dc1619946b0bb0d1c95856d79f1b6f","cross_cats_sorted":["cond-mat.supr-con"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2012-12-02T16:07:02Z","title_canon_sha256":"6a29ab10fe9ae8347219e67e68daca3c090715205c69c3a1c3309f690126ecfb"},"schema_version":"1.0","source":{"id":"1212.0221","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1212.0221","created_at":"2026-05-18T01:52:48Z"},{"alias_kind":"arxiv_version","alias_value":"1212.0221v2","created_at":"2026-05-18T01:52:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1212.0221","created_at":"2026-05-18T01:52:48Z"},{"alias_kind":"pith_short_12","alias_value":"2KFQTN3FRR7W","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_16","alias_value":"2KFQTN3FRR7WI35S","created_at":"2026-05-18T12:26:50Z"},{"alias_kind":"pith_short_8","alias_value":"2KFQTN3F","created_at":"2026-05-18T12:26:50Z"}],"graph_snapshots":[{"event_id":"sha256:c07b3f941fba1998df058e5585eb1a20a4ce3d7c1dda5a5419fd176526187ad6","target":"graph","created_at":"2026-05-18T01:52:48Z","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 study the interplay of 3d and 4f electrons in the iron pnictides CeFe$_{1-x}$Co$_x$AsO and GdFe$_{1-y}$Co$_y$AsO, which correspond to two very different cases of $4f$-magnetic moment. Both CeFeAsO and GdFeAsO undergo a spin-density-wave (SDW) transition associated with Fe 3d electrons at high temperatures, which is rapidly suppressed by Fe/Co substitution. Superconductivity appears in a narrow doping range: $0.05 < x < 0.2$ for CeFe$_{1-x}$Co$_x$AsO and $0.05 < y < 0.25$ for GdFe$_{1-y}$Co$_y$AsO, showing a maximum transition temperature $T_\\textup{sc}$ of about 13.5 K for Ce and 19 K for G","authors_text":"A. Howard, A. Zakhidov, F. Ronning, H. Q. Yuan, J. Chen, J. Dai, J. D. Thompson, J. L. Zhang, L. Jiao, L. Yang, M. B. Salamon, N. Cornell, T. Shang, Y. Chen, Y. H. Chen","cross_cats":["cond-mat.supr-con"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2012-12-02T16:07:02Z","title":"Tunable interplay between 3d and 4f electrons in Co-doped iron pnictides"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1212.0221","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":"sha256:9a0f057190cc88c0aec16a1cea8aedf3d09d1e4a29c0544881a0efde9e3968aa","target":"record","created_at":"2026-05-18T01:52:48Z","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":"07b5f33c0cccc9b7172877bd478d6c9252dc1619946b0bb0d1c95856d79f1b6f","cross_cats_sorted":["cond-mat.supr-con"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2012-12-02T16:07:02Z","title_canon_sha256":"6a29ab10fe9ae8347219e67e68daca3c090715205c69c3a1c3309f690126ecfb"},"schema_version":"1.0","source":{"id":"1212.0221","kind":"arxiv","version":2}},"canonical_sha256":"d28b09b7658c7f646fb2e3612a4daabf21b0d4bc5ca93d5e8f3dfcc13953c3ce","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d28b09b7658c7f646fb2e3612a4daabf21b0d4bc5ca93d5e8f3dfcc13953c3ce","first_computed_at":"2026-05-18T01:52:48.558725Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:52:48.558725Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dB5TNKQTkz9F7vKUx68gbuYi/qkQDp6quQcYVRI78YEkXlA7S1osMCIUYJQ/6jIgojQB94MdigooRbqsuY9YCg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:52:48.559127Z","signed_message":"canonical_sha256_bytes"},"source_id":"1212.0221","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9a0f057190cc88c0aec16a1cea8aedf3d09d1e4a29c0544881a0efde9e3968aa","sha256:c07b3f941fba1998df058e5585eb1a20a4ce3d7c1dda5a5419fd176526187ad6"],"state_sha256":"5773449c966e03e79aa3242d7abd672ba40b7b55fc9c873aad60a435d1d19c17"}