{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:H6EB6PQG4X66ZCPSOHZ7CBCGNO","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":"3d635e7d4b27abb5a7bae417470798dcd07d9f610e6e1670c9bf30471caebd3f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2010-04-23T11:22:16Z","title_canon_sha256":"bcc3e62e81e06eb8febf70ba5619e3479461c56995839ff28262b200bb6738c4"},"schema_version":"1.0","source":{"id":"1004.4100","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1004.4100","created_at":"2026-05-18T02:07:54Z"},{"alias_kind":"arxiv_version","alias_value":"1004.4100v2","created_at":"2026-05-18T02:07:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1004.4100","created_at":"2026-05-18T02:07:54Z"},{"alias_kind":"pith_short_12","alias_value":"H6EB6PQG4X66","created_at":"2026-05-18T12:26:07Z"},{"alias_kind":"pith_short_16","alias_value":"H6EB6PQG4X66ZCPS","created_at":"2026-05-18T12:26:07Z"},{"alias_kind":"pith_short_8","alias_value":"H6EB6PQG","created_at":"2026-05-18T12:26:07Z"}],"graph_snapshots":[{"event_id":"sha256:ee7819e43a2a5af1bd4e640b248c1068bf65d75522d2d7d8353fba0a6730efe7","target":"graph","created_at":"2026-05-18T02:07:54Z","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 magnetic, electric and thermal properties of the ($Ln_{1-y}$Y$_{y}$)$_{0.7}$Ca$_{0.3}$CoO$_3$ perovskites ($Ln$~=~Pr, Nd) were investigated down to very low temperatures. The main attention was given to a peculiar metal-insulator transition, which is observed in the praseodymium based samples with $y=0.075$ and 0.15 at $T_{M-I}=64$ and 132~K, respectively. The study suggests that the transition, reported originally in Pr$_{0.5}$Ca$_{0.5}$CoO$_3$, is not due to a mere change of cobalt ions from the intermediate- to the low-spin states, but is associated also with a significant electron tran","authors_text":"E. \\v{S}antav\\'a, H. Fujishiro, H. Sasaki, J. Hejtm\\'anek, K. Kn\\'i\\v{z}ek, M. Mary\\v{s}ko, Z. Jir\\'ak T. Naito","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2010-04-23T11:22:16Z","title":"Metal-insulator transition and the Pr$^{3+}$/Pr$^{4+}$ valence shift in (Pr$_{1-y}$Y$_{y}$)$_{0.7}$Ca$_{0.3}$CoO$_3$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1004.4100","kind":"arxiv","version":2},"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:aee8fcdb1393bd30e152538efcf028df43bd57509ff1989b7861b6c31ce43f7e","target":"record","created_at":"2026-05-18T02:07:54Z","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":"3d635e7d4b27abb5a7bae417470798dcd07d9f610e6e1670c9bf30471caebd3f","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2010-04-23T11:22:16Z","title_canon_sha256":"bcc3e62e81e06eb8febf70ba5619e3479461c56995839ff28262b200bb6738c4"},"schema_version":"1.0","source":{"id":"1004.4100","kind":"arxiv","version":2}},"canonical_sha256":"3f881f3e06e5fdec89f271f3f104466b85c575b8ac35eb9e3977390ab3a99360","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3f881f3e06e5fdec89f271f3f104466b85c575b8ac35eb9e3977390ab3a99360","first_computed_at":"2026-05-18T02:07:54.694812Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:07:54.694812Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"u1D3CjBks1BeLAUdq/AgIrKJCzRSJwhiFVPfM5pt7zLzZk8ArIWTubLwW+vLHOBPalZC9pC1ehpnKlTfBl1GAA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:07:54.695399Z","signed_message":"canonical_sha256_bytes"},"source_id":"1004.4100","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:aee8fcdb1393bd30e152538efcf028df43bd57509ff1989b7861b6c31ce43f7e","sha256:ee7819e43a2a5af1bd4e640b248c1068bf65d75522d2d7d8353fba0a6730efe7"],"state_sha256":"dc6ec4fa43fc2956abdb6a5b8ddc5a2671a3794ad5440a8d40e876f97ae70bc9"}