{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2002:X7NH4CBC5LEGMIHASJ5WFLVGD6","short_pith_number":"pith:X7NH4CBC","canonical_record":{"source":{"id":"cond-mat/0203378","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2002-03-19T15:17:46Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"9e92f2ba639919817d081f68ca4cc9391daab7d5e9a45bd6152a8a0d44fc5867","abstract_canon_sha256":"95c8ebd03f2d4d814baee74c7c6cf05f5cb3c3127653e125f8775a00b221d6f8"},"schema_version":"1.0"},"canonical_sha256":"bfda7e0822eac86620e0927b62aea61fb0c014a7403f126b902667e00ebdc781","source":{"kind":"arxiv","id":"cond-mat/0203378","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0203378","created_at":"2026-05-18T01:09:03Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0203378v1","created_at":"2026-05-18T01:09:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0203378","created_at":"2026-05-18T01:09:03Z"},{"alias_kind":"pith_short_12","alias_value":"X7NH4CBC5LEG","created_at":"2026-05-18T12:25:51Z"},{"alias_kind":"pith_short_16","alias_value":"X7NH4CBC5LEGMIHA","created_at":"2026-05-18T12:25:51Z"},{"alias_kind":"pith_short_8","alias_value":"X7NH4CBC","created_at":"2026-05-18T12:25:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2002:X7NH4CBC5LEGMIHASJ5WFLVGD6","target":"record","payload":{"canonical_record":{"source":{"id":"cond-mat/0203378","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2002-03-19T15:17:46Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"9e92f2ba639919817d081f68ca4cc9391daab7d5e9a45bd6152a8a0d44fc5867","abstract_canon_sha256":"95c8ebd03f2d4d814baee74c7c6cf05f5cb3c3127653e125f8775a00b221d6f8"},"schema_version":"1.0"},"canonical_sha256":"bfda7e0822eac86620e0927b62aea61fb0c014a7403f126b902667e00ebdc781","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:09:03.134372Z","signature_b64":"r7qchH1v9FDEa/qMDM7p3+XlVgT+j+aGNacssYf3No/Zb6IOEA+263Ovv3KbW7OCsefSwy2gHAXk8ojytn6GDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bfda7e0822eac86620e0927b62aea61fb0c014a7403f126b902667e00ebdc781","last_reissued_at":"2026-05-18T01:09:03.133927Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:09:03.133927Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"cond-mat/0203378","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":"2026-05-18T01:09:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zo4/L+ZwHPdmNNNdfnKr6z/VBHrWn84FvtId+HkKQfB8CuxtxUj5HmSzkXW3T8HMk0f3+mweMc8jFibLfHXdAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T10:39:36.837402Z"},"content_sha256":"1c96d9ee2b8590c02c99fcd37236705febb3671ddfb958bf704f2c1df0f8f57f","schema_version":"1.0","event_id":"sha256:1c96d9ee2b8590c02c99fcd37236705febb3671ddfb958bf704f2c1df0f8f57f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2002:X7NH4CBC5LEGMIHASJ5WFLVGD6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Selective Spin-State Switch and Metal-Insulator Transition in \\boldmath $\\rm GdBaCo_2O_{5.5}$","license":"","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"A. Llobet, C. Frontera, J.L. Garc\\'ia-Mu\\~noz, M.A.G. Aranda","submitted_at":"2002-03-19T15:17:46Z","abstract_excerpt":"Ultra-high resolution synchrotron diffraction data for $\\rm GdBaCo_2O_{5.5}$ throw new light on the metal-insulator transition of Co$^{3+}$ Ba-cobaltites. An anomalous expansion of CoO$_6$ octahedra is observed at the phase transition on heating, while CoO$_5$ pyramids show the normal shrinking at the closing of the gap. The insulator-to-metal transition is attributed to a sudden excitation of some electrons in the octahedra ($t_{2g}^6$ state) into the Co $e_g$ band (final $t_{2g}^4e_g^2$ state). The $t_{2g}^5e_g^1$ state in the pyramids does not change and the structural study also rules out "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0203378","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":"2026-05-18T01:09:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AE6MPrRWXPRwuEZaV3hODqmxhCfRQxkX83S2troDa5nStZKKJ7Z4cLOnZzf43UaaYF6oISdey38KXC/VpafiDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T10:39:36.838156Z"},"content_sha256":"8d4b7855d2f09666672dd5fe44a7a45552304524431e20c9f7c3d2fae1515c98","schema_version":"1.0","event_id":"sha256:8d4b7855d2f09666672dd5fe44a7a45552304524431e20c9f7c3d2fae1515c98"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/X7NH4CBC5LEGMIHASJ5WFLVGD6/bundle.json","state_url":"https://pith.science/pith/X7NH4CBC5LEGMIHASJ5WFLVGD6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/X7NH4CBC5LEGMIHASJ5WFLVGD6/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":"2026-05-30T10:39:36Z","links":{"resolver":"https://pith.science/pith/X7NH4CBC5LEGMIHASJ5WFLVGD6","bundle":"https://pith.science/pith/X7NH4CBC5LEGMIHASJ5WFLVGD6/bundle.json","state":"https://pith.science/pith/X7NH4CBC5LEGMIHASJ5WFLVGD6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/X7NH4CBC5LEGMIHASJ5WFLVGD6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2002:X7NH4CBC5LEGMIHASJ5WFLVGD6","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":"95c8ebd03f2d4d814baee74c7c6cf05f5cb3c3127653e125f8775a00b221d6f8","cross_cats_sorted":["cond-mat.str-el"],"license":"","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2002-03-19T15:17:46Z","title_canon_sha256":"9e92f2ba639919817d081f68ca4cc9391daab7d5e9a45bd6152a8a0d44fc5867"},"schema_version":"1.0","source":{"id":"cond-mat/0203378","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0203378","created_at":"2026-05-18T01:09:03Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0203378v1","created_at":"2026-05-18T01:09:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0203378","created_at":"2026-05-18T01:09:03Z"},{"alias_kind":"pith_short_12","alias_value":"X7NH4CBC5LEG","created_at":"2026-05-18T12:25:51Z"},{"alias_kind":"pith_short_16","alias_value":"X7NH4CBC5LEGMIHA","created_at":"2026-05-18T12:25:51Z"},{"alias_kind":"pith_short_8","alias_value":"X7NH4CBC","created_at":"2026-05-18T12:25:51Z"}],"graph_snapshots":[{"event_id":"sha256:8d4b7855d2f09666672dd5fe44a7a45552304524431e20c9f7c3d2fae1515c98","target":"graph","created_at":"2026-05-18T01:09:03Z","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":"Ultra-high resolution synchrotron diffraction data for $\\rm GdBaCo_2O_{5.5}$ throw new light on the metal-insulator transition of Co$^{3+}$ Ba-cobaltites. An anomalous expansion of CoO$_6$ octahedra is observed at the phase transition on heating, while CoO$_5$ pyramids show the normal shrinking at the closing of the gap. The insulator-to-metal transition is attributed to a sudden excitation of some electrons in the octahedra ($t_{2g}^6$ state) into the Co $e_g$ band (final $t_{2g}^4e_g^2$ state). The $t_{2g}^5e_g^1$ state in the pyramids does not change and the structural study also rules out ","authors_text":"A. Llobet, C. Frontera, J.L. Garc\\'ia-Mu\\~noz, M.A.G. Aranda","cross_cats":["cond-mat.str-el"],"headline":"","license":"","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2002-03-19T15:17:46Z","title":"Selective Spin-State Switch and Metal-Insulator Transition in \\boldmath $\\rm GdBaCo_2O_{5.5}$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0203378","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":"sha256:1c96d9ee2b8590c02c99fcd37236705febb3671ddfb958bf704f2c1df0f8f57f","target":"record","created_at":"2026-05-18T01:09:03Z","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":"95c8ebd03f2d4d814baee74c7c6cf05f5cb3c3127653e125f8775a00b221d6f8","cross_cats_sorted":["cond-mat.str-el"],"license":"","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2002-03-19T15:17:46Z","title_canon_sha256":"9e92f2ba639919817d081f68ca4cc9391daab7d5e9a45bd6152a8a0d44fc5867"},"schema_version":"1.0","source":{"id":"cond-mat/0203378","kind":"arxiv","version":1}},"canonical_sha256":"bfda7e0822eac86620e0927b62aea61fb0c014a7403f126b902667e00ebdc781","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bfda7e0822eac86620e0927b62aea61fb0c014a7403f126b902667e00ebdc781","first_computed_at":"2026-05-18T01:09:03.133927Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:09:03.133927Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"r7qchH1v9FDEa/qMDM7p3+XlVgT+j+aGNacssYf3No/Zb6IOEA+263Ovv3KbW7OCsefSwy2gHAXk8ojytn6GDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:09:03.134372Z","signed_message":"canonical_sha256_bytes"},"source_id":"cond-mat/0203378","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1c96d9ee2b8590c02c99fcd37236705febb3671ddfb958bf704f2c1df0f8f57f","sha256:8d4b7855d2f09666672dd5fe44a7a45552304524431e20c9f7c3d2fae1515c98"],"state_sha256":"86978eb4860fdd8de12514263374edd8cd27014b3ea50bf65453e9f5637be9a6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zeNsduy3uEUxgyoJBkdG4cQF2ENwJkIK1pDOzLbDrOeFnHRZORiwWekLEQ10B991mR14TrW5c1zDEU3ggHe4Cg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T10:39:36.841926Z","bundle_sha256":"3e4a6fb1f082a3a205c03dd9f65e80dce731609c1a94f1bdffe07ba1ea643f78"}}