{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:CV5L47Y6YQRFGOGP54HURLRVN4","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":"ab5413e07d363a853fedd83ccf1280a4a57ff8183dfa4c5b7a19895c5b6d3bb6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2020-07-03T14:45:18Z","title_canon_sha256":"f49493227ec5a3cbfea6a181573ab77b357b683c759b93bedeb4a8805f71d4e1"},"schema_version":"1.0","source":{"id":"2007.01723","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.01723","created_at":"2026-07-05T02:19:55Z"},{"alias_kind":"arxiv_version","alias_value":"2007.01723v3","created_at":"2026-07-05T02:19:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.01723","created_at":"2026-07-05T02:19:55Z"},{"alias_kind":"pith_short_12","alias_value":"CV5L47Y6YQRF","created_at":"2026-07-05T02:19:55Z"},{"alias_kind":"pith_short_16","alias_value":"CV5L47Y6YQRFGOGP","created_at":"2026-07-05T02:19:55Z"},{"alias_kind":"pith_short_8","alias_value":"CV5L47Y6","created_at":"2026-07-05T02:19:55Z"}],"graph_snapshots":[{"event_id":"sha256:b72bdee4179c466a74ae8d28f3b0730f5451465514b6e61b6f7d0dfc3dd602cb","target":"graph","created_at":"2026-07-05T02:19:55Z","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/2007.01723/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Ta$_2$NiSe$_5$ became one of the most investigated candidate materials for hosting an excitonic insulator ground state. Many studies describe the corresponding phase transition as a condensation of excitons breaking a continuous symmetry. This view got challenged recently pointing out the importance of the loss of two mirror symmetries at a structural phase transition that occurs together with the semiconductor-excitonic insulator transition. For such a scenario an unstable optical zone-center phonon at low energy is proposed to drive the transition. Here we report on the experimental observat","authors_text":"Armin Schulz, Hidenori Takagi, Masahiko Isobe, Min-Jae Kim, Stefan Kaiser, Tomohiro Takayama","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2020-07-03T14:45:18Z","title":"Phononic soft mode and strong electronic background behavior across the structural phase transition in the excitonic insulator Ta$_2$NiSe$_5$ (with Erratum)"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.01723","kind":"arxiv","version":3},"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":"sha256:4cef59270420bdc779826efcaa09f43933e6391e69e7d20f9a2462f19f3bec20","target":"record","created_at":"2026-07-05T02:19:55Z","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":"ab5413e07d363a853fedd83ccf1280a4a57ff8183dfa4c5b7a19895c5b6d3bb6","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2020-07-03T14:45:18Z","title_canon_sha256":"f49493227ec5a3cbfea6a181573ab77b357b683c759b93bedeb4a8805f71d4e1"},"schema_version":"1.0","source":{"id":"2007.01723","kind":"arxiv","version":3}},"canonical_sha256":"157abe7f1ec4225338cfef0f48ae356f12dfcecdf0064592658f9a2440f4b57d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"157abe7f1ec4225338cfef0f48ae356f12dfcecdf0064592658f9a2440f4b57d","first_computed_at":"2026-07-05T02:19:55.008660Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:19:55.008660Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"FEi2BI4yMwS2oW08lMVeVBhzUGWofqB/LWlwi6Wrx/ugHA4amdWQyIF/Ze/SXaNtvAlu67rlO3MF/Fn+Pyy0Ag==","signature_status":"signed_v1","signed_at":"2026-07-05T02:19:55.009031Z","signed_message":"canonical_sha256_bytes"},"source_id":"2007.01723","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4cef59270420bdc779826efcaa09f43933e6391e69e7d20f9a2462f19f3bec20","sha256:b72bdee4179c466a74ae8d28f3b0730f5451465514b6e61b6f7d0dfc3dd602cb"],"state_sha256":"48a2f5dabaf2e294c992d4de8e8a257fc92acd8c9e5eacc6d17d960b49332398"}