{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1999:NUUROEFLRQNJVI2QIQPRJIBFJX","short_pith_number":"pith:NUUROEFL","canonical_record":{"source":{"id":"cond-mat/9908217","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.supr-con","submitted_at":"1999-08-16T07:40:26Z","cross_cats_sorted":[],"title_canon_sha256":"a77b6e71c30597fa097f494b94fc63d9518817b2c4f4f12f93b7086cd250bdea","abstract_canon_sha256":"f4649272ba873276186960ff99a4d511c4a7b55173d294d52a8fe626e91cab0d"},"schema_version":"1.0"},"canonical_sha256":"6d291710ab8c1a9aa350441f14a0254dd153a7438a311b0214b9633b8268e943","source":{"kind":"arxiv","id":"cond-mat/9908217","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/9908217","created_at":"2026-07-04T16:13:10Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/9908217v1","created_at":"2026-07-04T16:13:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/9908217","created_at":"2026-07-04T16:13:10Z"},{"alias_kind":"pith_short_12","alias_value":"NUUROEFLRQNJ","created_at":"2026-07-04T16:13:10Z"},{"alias_kind":"pith_short_16","alias_value":"NUUROEFLRQNJVI2Q","created_at":"2026-07-04T16:13:10Z"},{"alias_kind":"pith_short_8","alias_value":"NUUROEFL","created_at":"2026-07-04T16:13:10Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1999:NUUROEFLRQNJVI2QIQPRJIBFJX","target":"record","payload":{"canonical_record":{"source":{"id":"cond-mat/9908217","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.supr-con","submitted_at":"1999-08-16T07:40:26Z","cross_cats_sorted":[],"title_canon_sha256":"a77b6e71c30597fa097f494b94fc63d9518817b2c4f4f12f93b7086cd250bdea","abstract_canon_sha256":"f4649272ba873276186960ff99a4d511c4a7b55173d294d52a8fe626e91cab0d"},"schema_version":"1.0"},"canonical_sha256":"6d291710ab8c1a9aa350441f14a0254dd153a7438a311b0214b9633b8268e943","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:13:10.031472Z","signature_b64":"q0d/MfNxVWeuUi84v4s7bKqCKPFoLbs7D7MR2w2I8OllKBwaPZ2A/Xoes9yhd7Oi4JMUpnj6Co2idDauxjcOAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6d291710ab8c1a9aa350441f14a0254dd153a7438a311b0214b9633b8268e943","last_reissued_at":"2026-07-04T16:13:10.031064Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:13:10.031064Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"cond-mat/9908217","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T16:13:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZoTurPkrudgYdQtozLUCWOkE4w/GsZy2p6BaR13d4ALnK2K6MGdDXWPuaZzw07bfBt9s2xD+YRPDsy63AVI+Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T11:46:49.351375Z"},"content_sha256":"aaa408ec9f35bba18ad6fa6f4f352cdc849a8efeb9a4f12e1e71d2556d11d5df","schema_version":"1.0","event_id":"sha256:aaa408ec9f35bba18ad6fa6f4f352cdc849a8efeb9a4f12e1e71d2556d11d5df"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1999:NUUROEFLRQNJVI2QIQPRJIBFJX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Structural instability associated with the tilting of CuO6 octahedra in La2-xSrxCuO4","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"C. H. Lee, G. Shirane, H. Kimura, K. Hirota, K. Yamada","submitted_at":"1999-08-16T07:40:26Z","abstract_excerpt":"Comprehensive inelastic neutron-scattering measurements were performed to study the soft optical phonons in La2-xSrxCuO4 at x=0.10, 0.12 and 0.18. We found at x=0.18 that the softening of Z-point phonon, suggesting incipient structural transition from the low-temperature orthorhombic (LTO) to low-temperature tetragonal (LTT) phase, breaks at Tc, which is consistent with the previous report by Lee et al. for the optimally doped x=0.15 sample. As for x=0.10 and 0.12, on the other hand, the softening continues even below Tc. It is thus clarified that the breaking of soft phonon is characteristic "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/9908217","kind":"arxiv","version":1},"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/cond-mat/9908217/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":"2026-07-04T16:13:10Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GxiOuzQK5ATxsih4utnfyU8VXIgd+eF3rYtlXIGM0jx8ZFq6cBhAbWfALFylktHJcDTL8Vi7vD7otxQgy1FqCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T11:46:49.352000Z"},"content_sha256":"64db12b9cb4580c3a8f2e8e8e65bde26ba2e68502ff7ae964edda412b12497c4","schema_version":"1.0","event_id":"sha256:64db12b9cb4580c3a8f2e8e8e65bde26ba2e68502ff7ae964edda412b12497c4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NUUROEFLRQNJVI2QIQPRJIBFJX/bundle.json","state_url":"https://pith.science/pith/NUUROEFLRQNJVI2QIQPRJIBFJX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NUUROEFLRQNJVI2QIQPRJIBFJX/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":"2026-08-06T11:46:49Z","links":{"resolver":"https://pith.science/pith/NUUROEFLRQNJVI2QIQPRJIBFJX","bundle":"https://pith.science/pith/NUUROEFLRQNJVI2QIQPRJIBFJX/bundle.json","state":"https://pith.science/pith/NUUROEFLRQNJVI2QIQPRJIBFJX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NUUROEFLRQNJVI2QIQPRJIBFJX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1999:NUUROEFLRQNJVI2QIQPRJIBFJX","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":"f4649272ba873276186960ff99a4d511c4a7b55173d294d52a8fe626e91cab0d","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.supr-con","submitted_at":"1999-08-16T07:40:26Z","title_canon_sha256":"a77b6e71c30597fa097f494b94fc63d9518817b2c4f4f12f93b7086cd250bdea"},"schema_version":"1.0","source":{"id":"cond-mat/9908217","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/9908217","created_at":"2026-07-04T16:13:10Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/9908217v1","created_at":"2026-07-04T16:13:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/9908217","created_at":"2026-07-04T16:13:10Z"},{"alias_kind":"pith_short_12","alias_value":"NUUROEFLRQNJ","created_at":"2026-07-04T16:13:10Z"},{"alias_kind":"pith_short_16","alias_value":"NUUROEFLRQNJVI2Q","created_at":"2026-07-04T16:13:10Z"},{"alias_kind":"pith_short_8","alias_value":"NUUROEFL","created_at":"2026-07-04T16:13:10Z"}],"graph_snapshots":[{"event_id":"sha256:64db12b9cb4580c3a8f2e8e8e65bde26ba2e68502ff7ae964edda412b12497c4","target":"graph","created_at":"2026-07-04T16:13:10Z","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/cond-mat/9908217/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Comprehensive inelastic neutron-scattering measurements were performed to study the soft optical phonons in La2-xSrxCuO4 at x=0.10, 0.12 and 0.18. We found at x=0.18 that the softening of Z-point phonon, suggesting incipient structural transition from the low-temperature orthorhombic (LTO) to low-temperature tetragonal (LTT) phase, breaks at Tc, which is consistent with the previous report by Lee et al. for the optimally doped x=0.15 sample. As for x=0.10 and 0.12, on the other hand, the softening continues even below Tc. It is thus clarified that the breaking of soft phonon is characteristic ","authors_text":"C. H. Lee, G. Shirane, H. Kimura, K. Hirota, K. Yamada","cross_cats":[],"headline":"","license":"","primary_cat":"cond-mat.supr-con","submitted_at":"1999-08-16T07:40:26Z","title":"Structural instability associated with the tilting of CuO6 octahedra in La2-xSrxCuO4"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/9908217","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:aaa408ec9f35bba18ad6fa6f4f352cdc849a8efeb9a4f12e1e71d2556d11d5df","target":"record","created_at":"2026-07-04T16:13:10Z","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":"f4649272ba873276186960ff99a4d511c4a7b55173d294d52a8fe626e91cab0d","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.supr-con","submitted_at":"1999-08-16T07:40:26Z","title_canon_sha256":"a77b6e71c30597fa097f494b94fc63d9518817b2c4f4f12f93b7086cd250bdea"},"schema_version":"1.0","source":{"id":"cond-mat/9908217","kind":"arxiv","version":1}},"canonical_sha256":"6d291710ab8c1a9aa350441f14a0254dd153a7438a311b0214b9633b8268e943","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6d291710ab8c1a9aa350441f14a0254dd153a7438a311b0214b9633b8268e943","first_computed_at":"2026-07-04T16:13:10.031064Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:13:10.031064Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"q0d/MfNxVWeuUi84v4s7bKqCKPFoLbs7D7MR2w2I8OllKBwaPZ2A/Xoes9yhd7Oi4JMUpnj6Co2idDauxjcOAg==","signature_status":"signed_v1","signed_at":"2026-07-04T16:13:10.031472Z","signed_message":"canonical_sha256_bytes"},"source_id":"cond-mat/9908217","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:aaa408ec9f35bba18ad6fa6f4f352cdc849a8efeb9a4f12e1e71d2556d11d5df","sha256:64db12b9cb4580c3a8f2e8e8e65bde26ba2e68502ff7ae964edda412b12497c4"],"state_sha256":"041264ad51e91d7d203428c64036a32b29a1640d60366f0e46dbe4cd933217a0"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2IQrSpg3dAtfSslZ6sdsVqrlD9Co6QhFp0Gdj5X2jH6JAe0Pfs71lDMmXqOFfSCe9cq0QpfDFOWDb1tPSm7UBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T11:46:49.359840Z","bundle_sha256":"a0bb3f2d2dcb7224b0b85dc41f12b6e205dae079d1c3f90a360c89d7550b17ad"}}