{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:4LMWSNKBDFVG7GJZYYITKEKBYF","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":"81a556252f22c3e349c10be3a2ff40ea387bcfa5606454e7616693f6038a7aed","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2018-10-23T17:10:36Z","title_canon_sha256":"5bbb7ecf9fa172ce79713bfc6aefd3d9a8704f00ff8e8e8457d99aa8ad374563"},"schema_version":"1.0","source":{"id":"1810.09976","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1810.09976","created_at":"2026-05-17T23:53:57Z"},{"alias_kind":"arxiv_version","alias_value":"1810.09976v1","created_at":"2026-05-17T23:53:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1810.09976","created_at":"2026-05-17T23:53:57Z"},{"alias_kind":"pith_short_12","alias_value":"4LMWSNKBDFVG","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"4LMWSNKBDFVG7GJZ","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"4LMWSNKB","created_at":"2026-05-18T12:32:05Z"}],"graph_snapshots":[{"event_id":"sha256:9ef1f70c4ba9d9081b8b1ea126b047b7c237c633757917f7385fe1d51efac6aa","target":"graph","created_at":"2026-05-17T23:53:57Z","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":"In this paper, a comprehensive study of the effects of Ni-doping on structural, electrical, thermal and magnetic properties of the NbB2 is presented. Low amounts (\\leq 10 %) of Ni substitution on Nb sites cause structural distortions and induce drastic changes in the physical properties, such as the emergence of a bulk superconducting state with anomalous behaviors in the critical fields (lower and upper) and in the specific heat. Ni-doping at the 9 at.% level, for instance, is able to increase the critical temperature (TC) in stoichiometric NbB2 (< 1.3 K) to approximately 6.0 K. Bulk supercon","authors_text":"A. J. S. Machado, E. Diez, L. E. Corr\\^ea, M. S. da Luz, R. Lang, S. T. Renosto, Z. Fisk","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2018-10-23T17:10:36Z","title":"Evidence of unconventional superconductivity in the Ni-doped NbB2 system"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.09976","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":"sha256:731a9ede3ad330f4a7665504a3435c37101b8ab153783a339056a00a8529e7f1","target":"record","created_at":"2026-05-17T23:53:57Z","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":"81a556252f22c3e349c10be3a2ff40ea387bcfa5606454e7616693f6038a7aed","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2018-10-23T17:10:36Z","title_canon_sha256":"5bbb7ecf9fa172ce79713bfc6aefd3d9a8704f00ff8e8e8457d99aa8ad374563"},"schema_version":"1.0","source":{"id":"1810.09976","kind":"arxiv","version":1}},"canonical_sha256":"e2d9693541196a6f9939c611351141c167e6c367ed36f12d97df6176a265180c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e2d9693541196a6f9939c611351141c167e6c367ed36f12d97df6176a265180c","first_computed_at":"2026-05-17T23:53:57.366401Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:53:57.366401Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"/Ei8oKKULlBRNaXKm5L3N6tpXA6ULSnBLFfxR8WpfLeK5KHdKftNIjBMebsuzC2qu2WnEYkf2A0IWNXTGKsbAw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:53:57.367145Z","signed_message":"canonical_sha256_bytes"},"source_id":"1810.09976","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:731a9ede3ad330f4a7665504a3435c37101b8ab153783a339056a00a8529e7f1","sha256:9ef1f70c4ba9d9081b8b1ea126b047b7c237c633757917f7385fe1d51efac6aa"],"state_sha256":"cc09c49556407b24eea07f09312577e1aaa10cc047dd09d5e10fd312546ba02e"}