{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1998:DLLXB2WU5X733ZVIHIXRGSVETX","short_pith_number":"pith:DLLXB2WU","canonical_record":{"source":{"id":"cond-mat/9808284","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"cond-mat.str-el","submitted_at":"1998-08-25T22:26:17Z","cross_cats_sorted":[],"title_canon_sha256":"e3ea55db98c67a73edfe977288e284b8fddedcebe0f454dff1c78e53a57ecf4c","abstract_canon_sha256":"7f600bad885c1620c05dbd1ee5e9fe4589577b45722adbe925f5038babd80176"},"schema_version":"1.0"},"canonical_sha256":"1ad770ead4edffbde6a83a2f134aa49dfad44a2a302db04112840c351279b1bf","source":{"kind":"arxiv","id":"cond-mat/9808284","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/9808284","created_at":"2026-07-04T14:23:12Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/9808284v2","created_at":"2026-07-04T14:23:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/9808284","created_at":"2026-07-04T14:23:12Z"},{"alias_kind":"pith_short_12","alias_value":"DLLXB2WU5X73","created_at":"2026-07-04T14:23:12Z"},{"alias_kind":"pith_short_16","alias_value":"DLLXB2WU5X733ZVI","created_at":"2026-07-04T14:23:12Z"},{"alias_kind":"pith_short_8","alias_value":"DLLXB2WU","created_at":"2026-07-04T14:23:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1998:DLLXB2WU5X733ZVIHIXRGSVETX","target":"record","payload":{"canonical_record":{"source":{"id":"cond-mat/9808284","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"cond-mat.str-el","submitted_at":"1998-08-25T22:26:17Z","cross_cats_sorted":[],"title_canon_sha256":"e3ea55db98c67a73edfe977288e284b8fddedcebe0f454dff1c78e53a57ecf4c","abstract_canon_sha256":"7f600bad885c1620c05dbd1ee5e9fe4589577b45722adbe925f5038babd80176"},"schema_version":"1.0"},"canonical_sha256":"1ad770ead4edffbde6a83a2f134aa49dfad44a2a302db04112840c351279b1bf","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T14:23:12.767547Z","signature_b64":"D1PDaX0R5Dv5BQvuLzO6hXhYYY7OUrLmRYKuw/k+0ipt7U5mfxYTo5P3jRD04bV6kKa7bM4t5UDhETgHQK1qCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1ad770ead4edffbde6a83a2f134aa49dfad44a2a302db04112840c351279b1bf","last_reissued_at":"2026-07-04T14:23:12.767144Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T14:23:12.767144Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"cond-mat/9808284","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T14:23:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EnDcWUSGz8mOcQ/iXQ2nrF5JiWeSlaZVHV9X2agS9TxN4pJamEmZ0jWfI06XBh6JlnZEJohKB1b2ACiavNeXBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T12:53:20.283490Z"},"content_sha256":"434b9524b941032939e9f7e3aaacf6060752332323aefb911704fe916e2b63bb","schema_version":"1.0","event_id":"sha256:434b9524b941032939e9f7e3aaacf6060752332323aefb911704fe916e2b63bb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1998:DLLXB2WU5X733ZVIHIXRGSVETX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Unconventional Transition from Metallic to Insulating Resistivity in the Spin-ladder Compound (Sr,Ca)$_{14}$Cu$_{24}$O$_{41}$","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"F. F. Balakirev, G. S. Boebinger, H. Eisaki, J. B. Betts, N. Motoyama, S. Uchida","submitted_at":"1998-08-25T22:26:17Z","abstract_excerpt":"Spin-ladder compounds make interesting analogs of the high-temperature superconductors, because they contain layers of nearly one-dimensional \"ladders\" consisting of a square array of copper and oxygen atoms. Increasing the number of legs in the ladders provides a step-wise approach toward the two-dimensional copper-oxygen plane, that structure believed to be a key to high temperature superconductivity. Short-range spin correlations in ladders have been predicted to lead to formation of hole pairs favorable for superconductivity, once enough holes are introduced onto the ladders by doping. Ind"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/9808284","kind":"arxiv","version":2},"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/cond-mat/9808284/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":"2026-07-04T14:23:12Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OukSwCvsUojwHxqmv78x25VpcEg+T563J4OI+75QV1aZYgzQBJO68PGeLnYIGAvwb6iJiF3IVGJXbt5ACpMeCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T12:53:20.284024Z"},"content_sha256":"216dca2f4f3f715009debf1f4e2f157a5009b88ab29f24bfca5c76cc3162855e","schema_version":"1.0","event_id":"sha256:216dca2f4f3f715009debf1f4e2f157a5009b88ab29f24bfca5c76cc3162855e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DLLXB2WU5X733ZVIHIXRGSVETX/bundle.json","state_url":"https://pith.science/pith/DLLXB2WU5X733ZVIHIXRGSVETX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DLLXB2WU5X733ZVIHIXRGSVETX/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":"2026-08-07T12:53:20Z","links":{"resolver":"https://pith.science/pith/DLLXB2WU5X733ZVIHIXRGSVETX","bundle":"https://pith.science/pith/DLLXB2WU5X733ZVIHIXRGSVETX/bundle.json","state":"https://pith.science/pith/DLLXB2WU5X733ZVIHIXRGSVETX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DLLXB2WU5X733ZVIHIXRGSVETX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1998:DLLXB2WU5X733ZVIHIXRGSVETX","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":"7f600bad885c1620c05dbd1ee5e9fe4589577b45722adbe925f5038babd80176","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.str-el","submitted_at":"1998-08-25T22:26:17Z","title_canon_sha256":"e3ea55db98c67a73edfe977288e284b8fddedcebe0f454dff1c78e53a57ecf4c"},"schema_version":"1.0","source":{"id":"cond-mat/9808284","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/9808284","created_at":"2026-07-04T14:23:12Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/9808284v2","created_at":"2026-07-04T14:23:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/9808284","created_at":"2026-07-04T14:23:12Z"},{"alias_kind":"pith_short_12","alias_value":"DLLXB2WU5X73","created_at":"2026-07-04T14:23:12Z"},{"alias_kind":"pith_short_16","alias_value":"DLLXB2WU5X733ZVI","created_at":"2026-07-04T14:23:12Z"},{"alias_kind":"pith_short_8","alias_value":"DLLXB2WU","created_at":"2026-07-04T14:23:12Z"}],"graph_snapshots":[{"event_id":"sha256:216dca2f4f3f715009debf1f4e2f157a5009b88ab29f24bfca5c76cc3162855e","target":"graph","created_at":"2026-07-04T14:23:12Z","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/cond-mat/9808284/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Spin-ladder compounds make interesting analogs of the high-temperature superconductors, because they contain layers of nearly one-dimensional \"ladders\" consisting of a square array of copper and oxygen atoms. Increasing the number of legs in the ladders provides a step-wise approach toward the two-dimensional copper-oxygen plane, that structure believed to be a key to high temperature superconductivity. Short-range spin correlations in ladders have been predicted to lead to formation of hole pairs favorable for superconductivity, once enough holes are introduced onto the ladders by doping. Ind","authors_text":"F. F. Balakirev, G. S. Boebinger, H. Eisaki, J. B. Betts, N. Motoyama, S. Uchida","cross_cats":[],"headline":"","license":"","primary_cat":"cond-mat.str-el","submitted_at":"1998-08-25T22:26:17Z","title":"Unconventional Transition from Metallic to Insulating Resistivity in the Spin-ladder Compound (Sr,Ca)$_{14}$Cu$_{24}$O$_{41}$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/9808284","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":"sha256:434b9524b941032939e9f7e3aaacf6060752332323aefb911704fe916e2b63bb","target":"record","created_at":"2026-07-04T14:23:12Z","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":"7f600bad885c1620c05dbd1ee5e9fe4589577b45722adbe925f5038babd80176","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.str-el","submitted_at":"1998-08-25T22:26:17Z","title_canon_sha256":"e3ea55db98c67a73edfe977288e284b8fddedcebe0f454dff1c78e53a57ecf4c"},"schema_version":"1.0","source":{"id":"cond-mat/9808284","kind":"arxiv","version":2}},"canonical_sha256":"1ad770ead4edffbde6a83a2f134aa49dfad44a2a302db04112840c351279b1bf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1ad770ead4edffbde6a83a2f134aa49dfad44a2a302db04112840c351279b1bf","first_computed_at":"2026-07-04T14:23:12.767144Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T14:23:12.767144Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"D1PDaX0R5Dv5BQvuLzO6hXhYYY7OUrLmRYKuw/k+0ipt7U5mfxYTo5P3jRD04bV6kKa7bM4t5UDhETgHQK1qCw==","signature_status":"signed_v1","signed_at":"2026-07-04T14:23:12.767547Z","signed_message":"canonical_sha256_bytes"},"source_id":"cond-mat/9808284","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:434b9524b941032939e9f7e3aaacf6060752332323aefb911704fe916e2b63bb","sha256:216dca2f4f3f715009debf1f4e2f157a5009b88ab29f24bfca5c76cc3162855e"],"state_sha256":"9fdddcdfb87b9f07a0d7abd5e51fd2ad8768ab862d42f73b44b2bcba99532b8a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"c/DunKPe6iUhcVwNQK5WZxQZviRnzEF7xk+UNpxrLt0uolVQp77GJ2qtekABAV431EjHzAayAqwHZ8/3dvKpAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T12:53:20.288139Z","bundle_sha256":"a052a5e998eb3fe16a8fbcafa88ab23bbd80f9ac2cf9dce0a5c72228db16b75f"}}