{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2002:7EVDVIMVJZFXLE3AMZ7R6AZ7YD","short_pith_number":"pith:7EVDVIMV","canonical_record":{"source":{"id":"cond-mat/0212621","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.str-el","submitted_at":"2002-12-28T13:24:54Z","cross_cats_sorted":["cond-mat.supr-con"],"title_canon_sha256":"c19bdda0d3dd19a5c5ee96702533827949b82ef7eb87a7a2ef4d6fb1061f9721","abstract_canon_sha256":"26ea2daecdd566660904731c40f1694f1a2a0beb4a6bc78fd2efdd66bbda33d5"},"schema_version":"1.0"},"canonical_sha256":"f92a3aa1954e4b759360667f1f033fc0ec699d20a8f652fea1d664f1258d16b1","source":{"kind":"arxiv","id":"cond-mat/0212621","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0212621","created_at":"2026-05-18T03:31:54Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0212621v1","created_at":"2026-05-18T03:31:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0212621","created_at":"2026-05-18T03:31:54Z"},{"alias_kind":"pith_short_12","alias_value":"7EVDVIMVJZFX","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"7EVDVIMVJZFXLE3A","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"7EVDVIMV","created_at":"2026-05-18T12:25:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2002:7EVDVIMVJZFXLE3AMZ7R6AZ7YD","target":"record","payload":{"canonical_record":{"source":{"id":"cond-mat/0212621","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"cond-mat.str-el","submitted_at":"2002-12-28T13:24:54Z","cross_cats_sorted":["cond-mat.supr-con"],"title_canon_sha256":"c19bdda0d3dd19a5c5ee96702533827949b82ef7eb87a7a2ef4d6fb1061f9721","abstract_canon_sha256":"26ea2daecdd566660904731c40f1694f1a2a0beb4a6bc78fd2efdd66bbda33d5"},"schema_version":"1.0"},"canonical_sha256":"f92a3aa1954e4b759360667f1f033fc0ec699d20a8f652fea1d664f1258d16b1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:31:54.759515Z","signature_b64":"KmE1nqYC5BrQKQRpjjAw6MtSwpMptX5oH1IVSgqkBsGiAMT66TwKZp85zz6npE49fcSFE2YfmjoVsRMPOnlSCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f92a3aa1954e4b759360667f1f033fc0ec699d20a8f652fea1d664f1258d16b1","last_reissued_at":"2026-05-18T03:31:54.758641Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:31:54.758641Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"cond-mat/0212621","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":"2026-05-18T03:31:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZubCPzu+lIAGUML1uJfjv0rhLenntGNhP52L3XMpqj3zRBy5mAEi7M028dTmXrV64nB2LyZE/Z0u03N6cN9cDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T20:41:05.309481Z"},"content_sha256":"d8c8d9d16967043ad459f4094a4a5aabc931ce4608fcabf57583e6f0cc7e3eb0","schema_version":"1.0","event_id":"sha256:d8c8d9d16967043ad459f4094a4a5aabc931ce4608fcabf57583e6f0cc7e3eb0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2002:7EVDVIMVJZFXLE3AMZ7R6AZ7YD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Charge Freezing in Zig-zag Chain Cuprates PrBa2Cu4O8 Observed by Cu Nuclear Quadrupole Resonance","license":"","headline":"","cross_cats":["cond-mat.supr-con"],"primary_cat":"cond-mat.str-el","authors_text":"M. Takigawa, S. Fujiyama, S. Horii","submitted_at":"2002-12-28T13:24:54Z","abstract_excerpt":"We report nuclear quadrupole resonance (NQR) studies on the chain Cu sites of PrBa$_{2}$Cu$_{4}$O$_{8}$, a quasi-one-dimensional conductor with a nearly quarter-filled band. The nuclear spin-lattice relaxation rate $1/T_{1}$ shows a pronounced peak near 100 K caused by fluctuations of electric field gradient (EFG). Similar peak was observed for the spin-echo decay rate $1/T_{2}$, however, at a different temperature near 50 K. These results and broadening of the NQR spectrum at low temperatures indicate that slow charge fluctuations of either electronic or ionic origin freeze gradually at low t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0212621","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":"2026-05-18T03:31:54Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tx2+prarGZ89f+HJui2frhpRsC+ade81i6mepPgtGvhrloJyjfuDQcWRs3E89n+UAfHCOZipVAyYpecYngY0Cw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T20:41:05.310151Z"},"content_sha256":"ee159586d760de89402b428358d1c482dfed643574987eb62aa68fdf22d13ec7","schema_version":"1.0","event_id":"sha256:ee159586d760de89402b428358d1c482dfed643574987eb62aa68fdf22d13ec7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7EVDVIMVJZFXLE3AMZ7R6AZ7YD/bundle.json","state_url":"https://pith.science/pith/7EVDVIMVJZFXLE3AMZ7R6AZ7YD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7EVDVIMVJZFXLE3AMZ7R6AZ7YD/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":"2026-05-25T20:41:05Z","links":{"resolver":"https://pith.science/pith/7EVDVIMVJZFXLE3AMZ7R6AZ7YD","bundle":"https://pith.science/pith/7EVDVIMVJZFXLE3AMZ7R6AZ7YD/bundle.json","state":"https://pith.science/pith/7EVDVIMVJZFXLE3AMZ7R6AZ7YD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7EVDVIMVJZFXLE3AMZ7R6AZ7YD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2002:7EVDVIMVJZFXLE3AMZ7R6AZ7YD","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":"26ea2daecdd566660904731c40f1694f1a2a0beb4a6bc78fd2efdd66bbda33d5","cross_cats_sorted":["cond-mat.supr-con"],"license":"","primary_cat":"cond-mat.str-el","submitted_at":"2002-12-28T13:24:54Z","title_canon_sha256":"c19bdda0d3dd19a5c5ee96702533827949b82ef7eb87a7a2ef4d6fb1061f9721"},"schema_version":"1.0","source":{"id":"cond-mat/0212621","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0212621","created_at":"2026-05-18T03:31:54Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0212621v1","created_at":"2026-05-18T03:31:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0212621","created_at":"2026-05-18T03:31:54Z"},{"alias_kind":"pith_short_12","alias_value":"7EVDVIMVJZFX","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"7EVDVIMVJZFXLE3A","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"7EVDVIMV","created_at":"2026-05-18T12:25:50Z"}],"graph_snapshots":[{"event_id":"sha256:ee159586d760de89402b428358d1c482dfed643574987eb62aa68fdf22d13ec7","target":"graph","created_at":"2026-05-18T03:31:54Z","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":"We report nuclear quadrupole resonance (NQR) studies on the chain Cu sites of PrBa$_{2}$Cu$_{4}$O$_{8}$, a quasi-one-dimensional conductor with a nearly quarter-filled band. The nuclear spin-lattice relaxation rate $1/T_{1}$ shows a pronounced peak near 100 K caused by fluctuations of electric field gradient (EFG). Similar peak was observed for the spin-echo decay rate $1/T_{2}$, however, at a different temperature near 50 K. These results and broadening of the NQR spectrum at low temperatures indicate that slow charge fluctuations of either electronic or ionic origin freeze gradually at low t","authors_text":"M. Takigawa, S. Fujiyama, S. Horii","cross_cats":["cond-mat.supr-con"],"headline":"","license":"","primary_cat":"cond-mat.str-el","submitted_at":"2002-12-28T13:24:54Z","title":"Charge Freezing in Zig-zag Chain Cuprates PrBa2Cu4O8 Observed by Cu Nuclear Quadrupole Resonance"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0212621","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:d8c8d9d16967043ad459f4094a4a5aabc931ce4608fcabf57583e6f0cc7e3eb0","target":"record","created_at":"2026-05-18T03:31:54Z","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":"26ea2daecdd566660904731c40f1694f1a2a0beb4a6bc78fd2efdd66bbda33d5","cross_cats_sorted":["cond-mat.supr-con"],"license":"","primary_cat":"cond-mat.str-el","submitted_at":"2002-12-28T13:24:54Z","title_canon_sha256":"c19bdda0d3dd19a5c5ee96702533827949b82ef7eb87a7a2ef4d6fb1061f9721"},"schema_version":"1.0","source":{"id":"cond-mat/0212621","kind":"arxiv","version":1}},"canonical_sha256":"f92a3aa1954e4b759360667f1f033fc0ec699d20a8f652fea1d664f1258d16b1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f92a3aa1954e4b759360667f1f033fc0ec699d20a8f652fea1d664f1258d16b1","first_computed_at":"2026-05-18T03:31:54.758641Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:31:54.758641Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KmE1nqYC5BrQKQRpjjAw6MtSwpMptX5oH1IVSgqkBsGiAMT66TwKZp85zz6npE49fcSFE2YfmjoVsRMPOnlSCA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:31:54.759515Z","signed_message":"canonical_sha256_bytes"},"source_id":"cond-mat/0212621","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d8c8d9d16967043ad459f4094a4a5aabc931ce4608fcabf57583e6f0cc7e3eb0","sha256:ee159586d760de89402b428358d1c482dfed643574987eb62aa68fdf22d13ec7"],"state_sha256":"e7676ce33a2e0c5806b39aaedfbb5805411416b531e9d6e06c4c7c04ad241a84"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Fq0beV1Xhnk1SSWoLLfV7FW8uBnlhReVt57TE5hwBWtzZSEO3d4lhA4xHKarKWVbUYPkId8sgo6Hd8YQFqMXCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T20:41:05.313755Z","bundle_sha256":"2dfc9ffffd91574e3c54a40c6c2a1d19b7efcb8628e38248e0035b26ff60bc80"}}