{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:AMPQPQ7DU73TVQWYCILS6XZLW7","short_pith_number":"pith:AMPQPQ7D","canonical_record":{"source":{"id":"1102.4787","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2011-02-23T16:40:53Z","cross_cats_sorted":[],"title_canon_sha256":"6bfb39cc8d1d9addeb633224d6cb361dfb67ff10f8e16bf59cc7917374b97ba2","abstract_canon_sha256":"853a312fcaa501226d6f79eed7e3b5bfb290bf42c5a99b6a46fc16162c5b5681"},"schema_version":"1.0"},"canonical_sha256":"031f07c3e3a7f73ac2d812172f5f2bb7ed9de43a5de240de5d53beb93e5d6026","source":{"kind":"arxiv","id":"1102.4787","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1102.4787","created_at":"2026-05-18T02:03:05Z"},{"alias_kind":"arxiv_version","alias_value":"1102.4787v1","created_at":"2026-05-18T02:03:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1102.4787","created_at":"2026-05-18T02:03:05Z"},{"alias_kind":"pith_short_12","alias_value":"AMPQPQ7DU73T","created_at":"2026-05-18T12:26:24Z"},{"alias_kind":"pith_short_16","alias_value":"AMPQPQ7DU73TVQWY","created_at":"2026-05-18T12:26:24Z"},{"alias_kind":"pith_short_8","alias_value":"AMPQPQ7D","created_at":"2026-05-18T12:26:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:AMPQPQ7DU73TVQWYCILS6XZLW7","target":"record","payload":{"canonical_record":{"source":{"id":"1102.4787","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2011-02-23T16:40:53Z","cross_cats_sorted":[],"title_canon_sha256":"6bfb39cc8d1d9addeb633224d6cb361dfb67ff10f8e16bf59cc7917374b97ba2","abstract_canon_sha256":"853a312fcaa501226d6f79eed7e3b5bfb290bf42c5a99b6a46fc16162c5b5681"},"schema_version":"1.0"},"canonical_sha256":"031f07c3e3a7f73ac2d812172f5f2bb7ed9de43a5de240de5d53beb93e5d6026","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:03:05.979817Z","signature_b64":"B7TjOhT3V+bRwRnPmp+dPPm57LeZOmbrGCI4HFBy9vUuUg2di4h7fF1N9hBnb+0jBK9f0qZOimw6E2K4Zf5rCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"031f07c3e3a7f73ac2d812172f5f2bb7ed9de43a5de240de5d53beb93e5d6026","last_reissued_at":"2026-05-18T02:03:05.979299Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:03:05.979299Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1102.4787","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":"2026-05-18T02:03:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"y7a0lpntCv3+pLaa3eV7MANMu+dnYHvDwL9KGtqYs1QBpg23GgIVL8OBbyeZBhTlOmoW/ef1QJ3jnyRfdEu8Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T21:27:22.903699Z"},"content_sha256":"b15024528ff326f04059c7067c922d0e2c41a1dc6d8cb7c35e5e36215d967f05","schema_version":"1.0","event_id":"sha256:b15024528ff326f04059c7067c922d0e2c41a1dc6d8cb7c35e5e36215d967f05"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:AMPQPQ7DU73TVQWYCILS6XZLW7","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Structural changes at the semiconductor-insulator phase transition in the single layered La0.5Sr1.5MnO4 perovskite","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"C. Mazzoli, G. Subias, J. Blasco, J. Garcia, J. Herrero-Martin","submitted_at":"2011-02-23T16:40:53Z","abstract_excerpt":"The semiconductor-insulator phase transition of the single-layer manganite La0.5Sr1.5MnO4 has been studied by means of high resolution synchrotron x-ray powder diffraction and resonant x-ray scattering at the Mn K edge. We conclude that a concomitant structural transition from tetragonal I4/mmm to orthorhombic Cmcm phases drives this electronic transition. A detailed symmetry-mode analysis reveals that condensation of three soft modes -Delta_2(B2u), X1+(B2u) and X1+(A)- acting on the oxygen atoms accounts for the structural transformation. The Delta_2 mode leads to a pseudo Jahn-Teller distort"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1102.4787","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":""},"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":"2026-05-18T02:03:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"UnTXSBV3ODrJV3uyYULGv3l7hdaPrr0tfkd2lH41Jf0BsYU0qqOmGWNJW1TLTPdRolhPwdsfoBrk6TPa97s4Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T21:27:22.904306Z"},"content_sha256":"29fcf3c1c894a649c9426d59e99e9ef9db0107569f85bf387a37fdf28553232b","schema_version":"1.0","event_id":"sha256:29fcf3c1c894a649c9426d59e99e9ef9db0107569f85bf387a37fdf28553232b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AMPQPQ7DU73TVQWYCILS6XZLW7/bundle.json","state_url":"https://pith.science/pith/AMPQPQ7DU73TVQWYCILS6XZLW7/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AMPQPQ7DU73TVQWYCILS6XZLW7/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":"2026-06-01T21:27:22Z","links":{"resolver":"https://pith.science/pith/AMPQPQ7DU73TVQWYCILS6XZLW7","bundle":"https://pith.science/pith/AMPQPQ7DU73TVQWYCILS6XZLW7/bundle.json","state":"https://pith.science/pith/AMPQPQ7DU73TVQWYCILS6XZLW7/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AMPQPQ7DU73TVQWYCILS6XZLW7/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:AMPQPQ7DU73TVQWYCILS6XZLW7","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":"853a312fcaa501226d6f79eed7e3b5bfb290bf42c5a99b6a46fc16162c5b5681","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2011-02-23T16:40:53Z","title_canon_sha256":"6bfb39cc8d1d9addeb633224d6cb361dfb67ff10f8e16bf59cc7917374b97ba2"},"schema_version":"1.0","source":{"id":"1102.4787","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1102.4787","created_at":"2026-05-18T02:03:05Z"},{"alias_kind":"arxiv_version","alias_value":"1102.4787v1","created_at":"2026-05-18T02:03:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1102.4787","created_at":"2026-05-18T02:03:05Z"},{"alias_kind":"pith_short_12","alias_value":"AMPQPQ7DU73T","created_at":"2026-05-18T12:26:24Z"},{"alias_kind":"pith_short_16","alias_value":"AMPQPQ7DU73TVQWY","created_at":"2026-05-18T12:26:24Z"},{"alias_kind":"pith_short_8","alias_value":"AMPQPQ7D","created_at":"2026-05-18T12:26:24Z"}],"graph_snapshots":[{"event_id":"sha256:29fcf3c1c894a649c9426d59e99e9ef9db0107569f85bf387a37fdf28553232b","target":"graph","created_at":"2026-05-18T02:03:05Z","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":"The semiconductor-insulator phase transition of the single-layer manganite La0.5Sr1.5MnO4 has been studied by means of high resolution synchrotron x-ray powder diffraction and resonant x-ray scattering at the Mn K edge. We conclude that a concomitant structural transition from tetragonal I4/mmm to orthorhombic Cmcm phases drives this electronic transition. A detailed symmetry-mode analysis reveals that condensation of three soft modes -Delta_2(B2u), X1+(B2u) and X1+(A)- acting on the oxygen atoms accounts for the structural transformation. The Delta_2 mode leads to a pseudo Jahn-Teller distort","authors_text":"C. Mazzoli, G. Subias, J. Blasco, J. Garcia, J. Herrero-Martin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2011-02-23T16:40:53Z","title":"Structural changes at the semiconductor-insulator phase transition in the single layered La0.5Sr1.5MnO4 perovskite"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1102.4787","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:b15024528ff326f04059c7067c922d0e2c41a1dc6d8cb7c35e5e36215d967f05","target":"record","created_at":"2026-05-18T02:03:05Z","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":"853a312fcaa501226d6f79eed7e3b5bfb290bf42c5a99b6a46fc16162c5b5681","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2011-02-23T16:40:53Z","title_canon_sha256":"6bfb39cc8d1d9addeb633224d6cb361dfb67ff10f8e16bf59cc7917374b97ba2"},"schema_version":"1.0","source":{"id":"1102.4787","kind":"arxiv","version":1}},"canonical_sha256":"031f07c3e3a7f73ac2d812172f5f2bb7ed9de43a5de240de5d53beb93e5d6026","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"031f07c3e3a7f73ac2d812172f5f2bb7ed9de43a5de240de5d53beb93e5d6026","first_computed_at":"2026-05-18T02:03:05.979299Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:03:05.979299Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"B7TjOhT3V+bRwRnPmp+dPPm57LeZOmbrGCI4HFBy9vUuUg2di4h7fF1N9hBnb+0jBK9f0qZOimw6E2K4Zf5rCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:03:05.979817Z","signed_message":"canonical_sha256_bytes"},"source_id":"1102.4787","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b15024528ff326f04059c7067c922d0e2c41a1dc6d8cb7c35e5e36215d967f05","sha256:29fcf3c1c894a649c9426d59e99e9ef9db0107569f85bf387a37fdf28553232b"],"state_sha256":"a1cf0ce6ec8750633a37d2aa79af12136fde792ecc351fca0b9531443e6d45fd"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2MqSI0h0ymLXzuWlLfJ/OCna3IiwDCcD2ZEZ3jdvPmHBKyuOPQCwsSNN/HoSUI0IOiwAy6amyHZ0hd/mgIQeDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T21:27:22.907152Z","bundle_sha256":"ed83d1dc241e94ebb18369999a875f8b051e6fb2125461a55daeec4b2bd4ca69"}}