{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2008:JW5XAYAR2EQWMEYWP27H6A6MF5","short_pith_number":"pith:JW5XAYAR","canonical_record":{"source":{"id":"0808.3152","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2008-08-22T22:00:39Z","cross_cats_sorted":[],"title_canon_sha256":"813006f9c28653eae2c13cf11bd51216d510f2c082d5dcf6494f8b91cdbd00d9","abstract_canon_sha256":"eafdda0d5e85cc7924927c3d75322537ec3edfa1f8e1ff2be619e91bede964cf"},"schema_version":"1.0"},"canonical_sha256":"4dbb706011d1216613167ebe7f03cc2f419d998546d14e1c06d1689c59ef9656","source":{"kind":"arxiv","id":"0808.3152","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0808.3152","created_at":"2026-07-04T17:12:26Z"},{"alias_kind":"arxiv_version","alias_value":"0808.3152v1","created_at":"2026-07-04T17:12:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0808.3152","created_at":"2026-07-04T17:12:26Z"},{"alias_kind":"pith_short_12","alias_value":"JW5XAYAR2EQW","created_at":"2026-07-04T17:12:26Z"},{"alias_kind":"pith_short_16","alias_value":"JW5XAYAR2EQWMEYW","created_at":"2026-07-04T17:12:26Z"},{"alias_kind":"pith_short_8","alias_value":"JW5XAYAR","created_at":"2026-07-04T17:12:26Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2008:JW5XAYAR2EQWMEYWP27H6A6MF5","target":"record","payload":{"canonical_record":{"source":{"id":"0808.3152","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2008-08-22T22:00:39Z","cross_cats_sorted":[],"title_canon_sha256":"813006f9c28653eae2c13cf11bd51216d510f2c082d5dcf6494f8b91cdbd00d9","abstract_canon_sha256":"eafdda0d5e85cc7924927c3d75322537ec3edfa1f8e1ff2be619e91bede964cf"},"schema_version":"1.0"},"canonical_sha256":"4dbb706011d1216613167ebe7f03cc2f419d998546d14e1c06d1689c59ef9656","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:12:26.771448Z","signature_b64":"w6xcv+kWWddQW3szcQhI5K/niwK5cnxtKqUWI4KNZAPsuViMex6xAk0Q739O2+so0y6ovuVjb7ZrgaR6CQJuDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"4dbb706011d1216613167ebe7f03cc2f419d998546d14e1c06d1689c59ef9656","last_reissued_at":"2026-07-04T17:12:26.771057Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:12:26.771057Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0808.3152","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":"2026-07-04T17:12:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8/2gBOReFgOHwi1d0WVTGvFgf2k74XfFOYncTl2c6n23VcVw9HTneMQNmz7XB39+5qWPIV3FrNU+EylUeQg6Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T02:29:48.262011Z"},"content_sha256":"bda0c942ac87839da112321afda958f4c0ae1ed04b46c883d8d936ee9666e831","schema_version":"1.0","event_id":"sha256:bda0c942ac87839da112321afda958f4c0ae1ed04b46c883d8d936ee9666e831"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2008:JW5XAYAR2EQWMEYWP27H6A6MF5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Lattice Properties of PbX (X = S, Se, Te): Experimental Studies and ab initio Calculations Including Spin-Orbit Effects","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"A.H. Romero, G. Siegle, J. Serrano, M. Cardona, R. K. Kremer, R. Lauck, X. C. Gonze","submitted_at":"2008-08-22T22:00:39Z","abstract_excerpt":"During the past five years the low temperature heat capacity of simple semiconductors and insulators has received renewed attention. Of particular interest has been its dependence on isotopic masses and the effect of spin- orbit coupling in ab initio calculations. Here we concentrate on the lead chalcogenides PbS, PbSe and PbTe. These materials, with rock salt structure, have different natural isotopes for both cations and anions, a fact that allows a systematic experimental and theoretical study of isotopic effects e.g. on the specific heat. Also, the large spin-orbit splitting of the 6p elec"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0808.3152","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/0808.3152/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":"2026-07-04T17:12:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vzQe5abuARond667n3NtQXXT/INsdv++2s1/AKqx39ITvHH4hhqT3DrCfUa9PAgUd1vD51EKgFNLv7cBbEW/BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T02:29:48.262504Z"},"content_sha256":"84c39ef4f425e4cb1ebaa8cbefe4301c6a19ea445a7a0443721755f0377e3728","schema_version":"1.0","event_id":"sha256:84c39ef4f425e4cb1ebaa8cbefe4301c6a19ea445a7a0443721755f0377e3728"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JW5XAYAR2EQWMEYWP27H6A6MF5/bundle.json","state_url":"https://pith.science/pith/JW5XAYAR2EQWMEYWP27H6A6MF5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JW5XAYAR2EQWMEYWP27H6A6MF5/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":"2026-08-05T02:29:48Z","links":{"resolver":"https://pith.science/pith/JW5XAYAR2EQWMEYWP27H6A6MF5","bundle":"https://pith.science/pith/JW5XAYAR2EQWMEYWP27H6A6MF5/bundle.json","state":"https://pith.science/pith/JW5XAYAR2EQWMEYWP27H6A6MF5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JW5XAYAR2EQWMEYWP27H6A6MF5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2008:JW5XAYAR2EQWMEYWP27H6A6MF5","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":"eafdda0d5e85cc7924927c3d75322537ec3edfa1f8e1ff2be619e91bede964cf","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2008-08-22T22:00:39Z","title_canon_sha256":"813006f9c28653eae2c13cf11bd51216d510f2c082d5dcf6494f8b91cdbd00d9"},"schema_version":"1.0","source":{"id":"0808.3152","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0808.3152","created_at":"2026-07-04T17:12:26Z"},{"alias_kind":"arxiv_version","alias_value":"0808.3152v1","created_at":"2026-07-04T17:12:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0808.3152","created_at":"2026-07-04T17:12:26Z"},{"alias_kind":"pith_short_12","alias_value":"JW5XAYAR2EQW","created_at":"2026-07-04T17:12:26Z"},{"alias_kind":"pith_short_16","alias_value":"JW5XAYAR2EQWMEYW","created_at":"2026-07-04T17:12:26Z"},{"alias_kind":"pith_short_8","alias_value":"JW5XAYAR","created_at":"2026-07-04T17:12:26Z"}],"graph_snapshots":[{"event_id":"sha256:84c39ef4f425e4cb1ebaa8cbefe4301c6a19ea445a7a0443721755f0377e3728","target":"graph","created_at":"2026-07-04T17:12:26Z","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/0808.3152/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"During the past five years the low temperature heat capacity of simple semiconductors and insulators has received renewed attention. Of particular interest has been its dependence on isotopic masses and the effect of spin- orbit coupling in ab initio calculations. Here we concentrate on the lead chalcogenides PbS, PbSe and PbTe. These materials, with rock salt structure, have different natural isotopes for both cations and anions, a fact that allows a systematic experimental and theoretical study of isotopic effects e.g. on the specific heat. Also, the large spin-orbit splitting of the 6p elec","authors_text":"A.H. Romero, G. Siegle, J. Serrano, M. Cardona, R. K. Kremer, R. Lauck, X. C. Gonze","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2008-08-22T22:00:39Z","title":"Lattice Properties of PbX (X = S, Se, Te): Experimental Studies and ab initio Calculations Including Spin-Orbit Effects"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0808.3152","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:bda0c942ac87839da112321afda958f4c0ae1ed04b46c883d8d936ee9666e831","target":"record","created_at":"2026-07-04T17:12:26Z","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":"eafdda0d5e85cc7924927c3d75322537ec3edfa1f8e1ff2be619e91bede964cf","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2008-08-22T22:00:39Z","title_canon_sha256":"813006f9c28653eae2c13cf11bd51216d510f2c082d5dcf6494f8b91cdbd00d9"},"schema_version":"1.0","source":{"id":"0808.3152","kind":"arxiv","version":1}},"canonical_sha256":"4dbb706011d1216613167ebe7f03cc2f419d998546d14e1c06d1689c59ef9656","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4dbb706011d1216613167ebe7f03cc2f419d998546d14e1c06d1689c59ef9656","first_computed_at":"2026-07-04T17:12:26.771057Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:12:26.771057Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"w6xcv+kWWddQW3szcQhI5K/niwK5cnxtKqUWI4KNZAPsuViMex6xAk0Q739O2+so0y6ovuVjb7ZrgaR6CQJuDg==","signature_status":"signed_v1","signed_at":"2026-07-04T17:12:26.771448Z","signed_message":"canonical_sha256_bytes"},"source_id":"0808.3152","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bda0c942ac87839da112321afda958f4c0ae1ed04b46c883d8d936ee9666e831","sha256:84c39ef4f425e4cb1ebaa8cbefe4301c6a19ea445a7a0443721755f0377e3728"],"state_sha256":"3939184e91c5cd78226ed6bee910d4a921ce6133e0f3ee042f9fe9c9327ed30f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TDMpXj5T+UX8le4+Pw0kpyRcpLFNMxD61ONCu2OM9FNFe4LurHbXmGnihIt1zg+IcfmaYWpfTh9Ob0YPgeHqAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T02:29:48.267911Z","bundle_sha256":"ec864689f406815afa73103943f4e9f5ea4c12f7b95fb0267ecf4c2cae11dd0c"}}