{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:FNFPZBDK5XKD72A73QCGL6PU3G","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":"fc87464167aae3b0df61d9a8f19860aa4c12fd3f514e7324afa9ddc80b015647","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-11-09T17:00:01Z","title_canon_sha256":"df1536872bf6a496e4f4cb2bd4f778eeaa780be0b2fa7eb58fe3276f48559963"},"schema_version":"1.0","source":{"id":"1511.02759","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1511.02759","created_at":"2026-05-18T01:27:29Z"},{"alias_kind":"arxiv_version","alias_value":"1511.02759v1","created_at":"2026-05-18T01:27:29Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1511.02759","created_at":"2026-05-18T01:27:29Z"},{"alias_kind":"pith_short_12","alias_value":"FNFPZBDK5XKD","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_16","alias_value":"FNFPZBDK5XKD72A7","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_8","alias_value":"FNFPZBDK","created_at":"2026-05-18T12:29:19Z"}],"graph_snapshots":[{"event_id":"sha256:48dfc877e413dc437d0e2d266c78907a0fe77b6d72cdfd39afce45a9d3954740","target":"graph","created_at":"2026-05-18T01:27:29Z","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 use inelastic neutron scattering to study the temperature and energy dependence of the spin excitation anisotropy in uniaxial-strained electron-doped iron pnictide BaFe$_{1.9}$Ni$_{0.1}$As$_2$ near optimal superconductivity ($T_c=20$ K). Our work has been motivated by the observation of in-plane resistivity anisotropy in the paramagnetic tetragonal phase of electron-underdoped iron pnictides under uniaxial pressure, which has been attributed to a spin-driven Ising-nematic state or orbital ordering. Here we show that the spin excitation anisotropy, a signature of the spin-driven Ising-nemati","authors_text":"David W. Tam, D. L. Abernathy, Huiqian Luo, J. L. Niedziela, Pengcheng Dai, Qimiao Si, Wei Tian, Xingye Lu, Yu Song","cross_cats":["cond-mat.str-el"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-11-09T17:00:01Z","title":"Energy dependence of the spin excitation anisotropy in uniaxial-strained BaFe1.9Ni0.1As2"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.02759","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":"sha256:14c2e1b44ce89cd806ef775398a68005d91324ea343a8469fb2d537a27408b44","target":"record","created_at":"2026-05-18T01:27:29Z","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":"fc87464167aae3b0df61d9a8f19860aa4c12fd3f514e7324afa9ddc80b015647","cross_cats_sorted":["cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2015-11-09T17:00:01Z","title_canon_sha256":"df1536872bf6a496e4f4cb2bd4f778eeaa780be0b2fa7eb58fe3276f48559963"},"schema_version":"1.0","source":{"id":"1511.02759","kind":"arxiv","version":1}},"canonical_sha256":"2b4afc846aedd43fe81fdc0465f9f4d9b7c220c8731932460df610e0df2fcfaf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2b4afc846aedd43fe81fdc0465f9f4d9b7c220c8731932460df610e0df2fcfaf","first_computed_at":"2026-05-18T01:27:29.420214Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:27:29.420214Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"gANyA1hSrzDG/I33oQFOinGUUq/tBWN++0iG3mddk+wwWCPWl+Z8uQX2FUIjGNiQed98H5h288dzdXMnsxzdCA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:27:29.420841Z","signed_message":"canonical_sha256_bytes"},"source_id":"1511.02759","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:14c2e1b44ce89cd806ef775398a68005d91324ea343a8469fb2d537a27408b44","sha256:48dfc877e413dc437d0e2d266c78907a0fe77b6d72cdfd39afce45a9d3954740"],"state_sha256":"e4a9322390419e0dc58f021de279fc1ffb371c455c15b7c4069c7a1c8719a7e8"}