{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:OSRGLC3S2GHAONNB2AMXIPWAUG","short_pith_number":"pith:OSRGLC3S","canonical_record":{"source":{"id":"2607.19663","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-07-22T02:06:32Z","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.str-el"],"title_canon_sha256":"f9568efe2654f009e71a5c52f6ade317bf70f1b840f86843f1ecc11684b6be31","abstract_canon_sha256":"fd9fe3f1d2cb4cf9786fea12b03b3cd787dcf54f2c9f7749e03919ac97bf2f53"},"schema_version":"1.0"},"canonical_sha256":"74a2658b72d18e0735a1d019743ec0a180ed4c5474c99408534162e4a3d96ced","source":{"kind":"arxiv","id":"2607.19663","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.19663","created_at":"2026-07-23T00:24:02Z"},{"alias_kind":"arxiv_version","alias_value":"2607.19663v1","created_at":"2026-07-23T00:24:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.19663","created_at":"2026-07-23T00:24:02Z"},{"alias_kind":"pith_short_12","alias_value":"OSRGLC3S2GHA","created_at":"2026-07-23T00:24:02Z"},{"alias_kind":"pith_short_16","alias_value":"OSRGLC3S2GHAONNB","created_at":"2026-07-23T00:24:02Z"},{"alias_kind":"pith_short_8","alias_value":"OSRGLC3S","created_at":"2026-07-23T00:24:02Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:OSRGLC3S2GHAONNB2AMXIPWAUG","target":"record","payload":{"canonical_record":{"source":{"id":"2607.19663","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-07-22T02:06:32Z","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.str-el"],"title_canon_sha256":"f9568efe2654f009e71a5c52f6ade317bf70f1b840f86843f1ecc11684b6be31","abstract_canon_sha256":"fd9fe3f1d2cb4cf9786fea12b03b3cd787dcf54f2c9f7749e03919ac97bf2f53"},"schema_version":"1.0"},"canonical_sha256":"74a2658b72d18e0735a1d019743ec0a180ed4c5474c99408534162e4a3d96ced","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-23T00:24:02.608263Z","signature_b64":"OsbMgxXka53kM/h8Ncz/dwIPj6nZf0i+/1XDrqpzCdjespMqSoH2XWbBRQKwFj/Fd/tzUV470MfLPGk+FaIlBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"74a2658b72d18e0735a1d019743ec0a180ed4c5474c99408534162e4a3d96ced","last_reissued_at":"2026-07-23T00:24:02.607401Z","signature_status":"signed_v1","first_computed_at":"2026-07-23T00:24:02.607401Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2607.19663","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":"2026-07-23T00:24:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8ow8BGX48VkJz9kurwdFF0MZYUQxuWpA6LLVb7vnXEeMKadKDkTQEBYrG2Lw6J8Pnx4JQzuRH7H3PaTBLbQvDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T19:32:47.419568Z"},"content_sha256":"bf4e98a62b29fb3ecdbdfba5f4a5ada3964283e33685850e4b325891033428cd","schema_version":"1.0","event_id":"sha256:bf4e98a62b29fb3ecdbdfba5f4a5ada3964283e33685850e4b325891033428cd"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:OSRGLC3S2GHAONNB2AMXIPWAUG","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Raman spectroscopy of van der Waals topological magnet GdGaI","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall","cond-mat.str-el"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Jun-ichi Yamaura, Kenji Watanabe, Nan Jiang, Ryutaro Okuma, Takashi Taniguchi, Tiantian Zhang, Tomo Higashihara, Tomoki Machida, Yasuhiro Niimi, Yijin Zhang, Yoshinori Okada, Yujie Xia","submitted_at":"2026-07-22T02:06:32Z","abstract_excerpt":"We report polarization-resolved Raman spectroscopy of a van der Waals compound GdGaI that is a candidate for excitonic insulators. By combining the symmetry analysis with density functional theory calculations, we identify six Raman-active phonons. The spectra exhibit only the expected anharmonic hardening down to 4 K: no additional peaks, no soft modes, and no signatures of zone folding are observed. This result indicates that any lattice distortion is below our experimental sensitivity, supporting an electronically driven origin for the band reconstruction reported by angle-resolved photoemi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.19663","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/2607.19663/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":"2026-07-23T00:24:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ezK5ENwbdmIJro2awVbw4hFCpT33kPNMRNOk/JhI/2VKe8uOpVtfEvrz4Io8PKPsF8zNJHg64h8g49/N10eXBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-03T19:32:47.419962Z"},"content_sha256":"50cbf47fc6fcf550ad063abbf19c62a8baeaf9dc5b2e78911a001fd241f96b02","schema_version":"1.0","event_id":"sha256:50cbf47fc6fcf550ad063abbf19c62a8baeaf9dc5b2e78911a001fd241f96b02"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OSRGLC3S2GHAONNB2AMXIPWAUG/bundle.json","state_url":"https://pith.science/pith/OSRGLC3S2GHAONNB2AMXIPWAUG/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OSRGLC3S2GHAONNB2AMXIPWAUG/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":"2026-08-03T19:32:47Z","links":{"resolver":"https://pith.science/pith/OSRGLC3S2GHAONNB2AMXIPWAUG","bundle":"https://pith.science/pith/OSRGLC3S2GHAONNB2AMXIPWAUG/bundle.json","state":"https://pith.science/pith/OSRGLC3S2GHAONNB2AMXIPWAUG/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OSRGLC3S2GHAONNB2AMXIPWAUG/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:OSRGLC3S2GHAONNB2AMXIPWAUG","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":"fd9fe3f1d2cb4cf9786fea12b03b3cd787dcf54f2c9f7749e03919ac97bf2f53","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-07-22T02:06:32Z","title_canon_sha256":"f9568efe2654f009e71a5c52f6ade317bf70f1b840f86843f1ecc11684b6be31"},"schema_version":"1.0","source":{"id":"2607.19663","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.19663","created_at":"2026-07-23T00:24:02Z"},{"alias_kind":"arxiv_version","alias_value":"2607.19663v1","created_at":"2026-07-23T00:24:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.19663","created_at":"2026-07-23T00:24:02Z"},{"alias_kind":"pith_short_12","alias_value":"OSRGLC3S2GHA","created_at":"2026-07-23T00:24:02Z"},{"alias_kind":"pith_short_16","alias_value":"OSRGLC3S2GHAONNB","created_at":"2026-07-23T00:24:02Z"},{"alias_kind":"pith_short_8","alias_value":"OSRGLC3S","created_at":"2026-07-23T00:24:02Z"}],"graph_snapshots":[{"event_id":"sha256:50cbf47fc6fcf550ad063abbf19c62a8baeaf9dc5b2e78911a001fd241f96b02","target":"graph","created_at":"2026-07-23T00:24:02Z","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/2607.19663/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We report polarization-resolved Raman spectroscopy of a van der Waals compound GdGaI that is a candidate for excitonic insulators. By combining the symmetry analysis with density functional theory calculations, we identify six Raman-active phonons. The spectra exhibit only the expected anharmonic hardening down to 4 K: no additional peaks, no soft modes, and no signatures of zone folding are observed. This result indicates that any lattice distortion is below our experimental sensitivity, supporting an electronically driven origin for the band reconstruction reported by angle-resolved photoemi","authors_text":"Jun-ichi Yamaura, Kenji Watanabe, Nan Jiang, Ryutaro Okuma, Takashi Taniguchi, Tiantian Zhang, Tomo Higashihara, Tomoki Machida, Yasuhiro Niimi, Yijin Zhang, Yoshinori Okada, Yujie Xia","cross_cats":["cond-mat.mes-hall","cond-mat.str-el"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-07-22T02:06:32Z","title":"Raman spectroscopy of van der Waals topological magnet GdGaI"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.19663","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:bf4e98a62b29fb3ecdbdfba5f4a5ada3964283e33685850e4b325891033428cd","target":"record","created_at":"2026-07-23T00:24:02Z","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":"fd9fe3f1d2cb4cf9786fea12b03b3cd787dcf54f2c9f7749e03919ac97bf2f53","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.str-el"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-07-22T02:06:32Z","title_canon_sha256":"f9568efe2654f009e71a5c52f6ade317bf70f1b840f86843f1ecc11684b6be31"},"schema_version":"1.0","source":{"id":"2607.19663","kind":"arxiv","version":1}},"canonical_sha256":"74a2658b72d18e0735a1d019743ec0a180ed4c5474c99408534162e4a3d96ced","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"74a2658b72d18e0735a1d019743ec0a180ed4c5474c99408534162e4a3d96ced","first_computed_at":"2026-07-23T00:24:02.607401Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-23T00:24:02.607401Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OsbMgxXka53kM/h8Ncz/dwIPj6nZf0i+/1XDrqpzCdjespMqSoH2XWbBRQKwFj/Fd/tzUV470MfLPGk+FaIlBg==","signature_status":"signed_v1","signed_at":"2026-07-23T00:24:02.608263Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.19663","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bf4e98a62b29fb3ecdbdfba5f4a5ada3964283e33685850e4b325891033428cd","sha256:50cbf47fc6fcf550ad063abbf19c62a8baeaf9dc5b2e78911a001fd241f96b02"],"state_sha256":"feecfcce9240824b339ca4f0037c4156e20270267fa6b7fa908c0453d708b7e1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"a8vnAsJOSeAH2vS47ho0UVdWsZ24ZM/vKmIHJ3azVESB/MyjInvgKxGZXMoPHCSjH52m/vht/ErRMxa7sebIAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-03T19:32:47.422652Z","bundle_sha256":"0b13147950549ad5ffd13e8af6c5ea4363d8af3d61f3c772fafb2a81cca52096"}}