{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:2F6OHFVT6ZFVB2QRVGSQKLZN45","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":"c57e11835fec8019babaa478eac76db63834b453da630e23c9d9c968644184f1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2015-07-22T09:53:44Z","title_canon_sha256":"e97b5d2396de1584a6118cccdae76f4caa9659a88d1512b95300d4a2db6e2834"},"schema_version":"1.0","source":{"id":"1507.06116","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1507.06116","created_at":"2026-05-18T01:08:44Z"},{"alias_kind":"arxiv_version","alias_value":"1507.06116v1","created_at":"2026-05-18T01:08:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1507.06116","created_at":"2026-05-18T01:08:44Z"},{"alias_kind":"pith_short_12","alias_value":"2F6OHFVT6ZFV","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_16","alias_value":"2F6OHFVT6ZFVB2QR","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_8","alias_value":"2F6OHFVT","created_at":"2026-05-18T12:28:59Z"}],"graph_snapshots":[{"event_id":"sha256:4994f98a39f5e0162f49415227974ba70b64e319fda321f0f53a3fc389172bd9","target":"graph","created_at":"2026-05-18T01:08:44Z","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":"An inelastic light (Raman) scattering study of nematicity and critical fluctuations in ${\\rm Ba(Fe_{1-x}Co_x)_2As_2}$ ($0\\le x \\le 0.051$) is presented. It is shown that the response from fluctuations appears only in $B_{1g}$ (${x^2-y^2}$) symmetry. The scattering amplitude increases towards the structural transition at $T_s$ but vanishes only below the magnetic ordering transition at $T_{\\rm SDW} < T_s$, suggesting a magnetic origin of the fluctuations. The theoretical analysis explains the selection rules and the temperature dependence of the fluctuation response. These results make magnetis","authors_text":"Andreas Baum, Bernhard Muschler, Carlo Di Castro, Daniel Jost, Florian Kretzschmar, Ian Randal Fisher, James G. Analytis, Jiun-Haw Chu, Joerg Schmalian, Marco Grilli, Rudi Hackl, Sergio Caprara, Thomas B\\\"ohm, Una Karahasanovi\\'c","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2015-07-22T09:53:44Z","title":"Nematic fluctuations and the magneto-structural phase transition in ${\\rm Ba(Fe_{1-x}Co_x)_2As_2}$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.06116","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:fbf68a34cf370a4e0cea911dd2d7173d57221c0d9c085c19b6ec100fb82610f6","target":"record","created_at":"2026-05-18T01:08:44Z","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":"c57e11835fec8019babaa478eac76db63834b453da630e23c9d9c968644184f1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2015-07-22T09:53:44Z","title_canon_sha256":"e97b5d2396de1584a6118cccdae76f4caa9659a88d1512b95300d4a2db6e2834"},"schema_version":"1.0","source":{"id":"1507.06116","kind":"arxiv","version":1}},"canonical_sha256":"d17ce396b3f64b50ea11a9a5052f2de760a4df3e6ce64ea43bdeed4a7d0d378b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d17ce396b3f64b50ea11a9a5052f2de760a4df3e6ce64ea43bdeed4a7d0d378b","first_computed_at":"2026-05-18T01:08:44.660744Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:08:44.660744Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"et1RjF6AfKj3Iovo1RKTTy4a2WJDRBsfziUF0NVyvd5sa+KBo7QjCE/hkFMXv2LQFQF+/wyDYgnoi/oiokomAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:08:44.661207Z","signed_message":"canonical_sha256_bytes"},"source_id":"1507.06116","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fbf68a34cf370a4e0cea911dd2d7173d57221c0d9c085c19b6ec100fb82610f6","sha256:4994f98a39f5e0162f49415227974ba70b64e319fda321f0f53a3fc389172bd9"],"state_sha256":"b46569a7959abb2d0742bb6bcf35963e2b6607c7796c423fe22f0b295f2535bf"}