{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2001:THGOV7NRL25AC2BLSZQVKFSB6T","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":"5e4f4916b24975ec16a4806a5a811e375eec291532ac2f60f7bab73d31975cf4","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.supr-con","submitted_at":"2001-02-22T18:58:50Z","title_canon_sha256":"cef2472b656f97df46a9a94096c3f94d48d224d10ca1cd2b2a638cdb15effca2"},"schema_version":"1.0","source":{"id":"cond-mat/0102410","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"cond-mat/0102410","created_at":"2026-05-18T04:30:24Z"},{"alias_kind":"arxiv_version","alias_value":"cond-mat/0102410v4","created_at":"2026-05-18T04:30:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.cond-mat/0102410","created_at":"2026-05-18T04:30:24Z"},{"alias_kind":"pith_short_12","alias_value":"THGOV7NRL25A","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"THGOV7NRL25AC2BL","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"THGOV7NR","created_at":"2026-05-18T12:25:50Z"}],"graph_snapshots":[{"event_id":"sha256:4df4537deaba3389a3b2d45aad612e3b623b5d06a9e6f16cb777295c59d888f9","target":"graph","created_at":"2026-05-18T04:30:24Z","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 variation of lattice structure in diborides (AB2) with different A atoms to identify the special case of MgB2 showing high Tc superconductivity. High purity MgB2 (Tc~39 K) has been prepared by direct reaction of the elements and the lattice parameters are measured by x-ray diffraction determining the strain e of the B-B distance. The results show that the superconductivity in these intermetallics appear near a critical point in a two variables (strain and charge density) phase diagram at (ec, rc).","authors_text":"A. Bianconi, A. Saccone, D. Di Castro, G. Campi, M. Giovannini M. Colapietro, N.L. Saini, S. Agrestini, S. De Negri","cross_cats":[],"headline":"","license":"","primary_cat":"cond-mat.supr-con","submitted_at":"2001-02-22T18:58:50Z","title":"High Tc superconductivity at a critical strain and charge density in diborides"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0102410","kind":"arxiv","version":4},"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":"sha256:5c0f1444359f352505d8e6b2f5e43a146c1dafcdb9fd5f7c9270b954a8f0ac1c","target":"record","created_at":"2026-05-18T04:30:24Z","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":"5e4f4916b24975ec16a4806a5a811e375eec291532ac2f60f7bab73d31975cf4","cross_cats_sorted":[],"license":"","primary_cat":"cond-mat.supr-con","submitted_at":"2001-02-22T18:58:50Z","title_canon_sha256":"cef2472b656f97df46a9a94096c3f94d48d224d10ca1cd2b2a638cdb15effca2"},"schema_version":"1.0","source":{"id":"cond-mat/0102410","kind":"arxiv","version":4}},"canonical_sha256":"99cceafdb15eba01682b9661551641f4cfe7f293d755df296b0da2545149deee","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"99cceafdb15eba01682b9661551641f4cfe7f293d755df296b0da2545149deee","first_computed_at":"2026-05-18T04:30:24.251134Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:30:24.251134Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HYMaI+RrkGzwza65nlKiTaQ1T5hutoHyX9gRCA/QK3VNbSjr6gSKJuCqBeyM2MZ+UXvq4xJIiiJetGPw5JBzCw==","signature_status":"signed_v1","signed_at":"2026-05-18T04:30:24.251928Z","signed_message":"canonical_sha256_bytes"},"source_id":"cond-mat/0102410","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5c0f1444359f352505d8e6b2f5e43a146c1dafcdb9fd5f7c9270b954a8f0ac1c","sha256:4df4537deaba3389a3b2d45aad612e3b623b5d06a9e6f16cb777295c59d888f9"],"state_sha256":"fec157a8e1cf4ac39f9b8edb6d8c0edefe2b506340f1eb0f30e6e02d175dd71b"}