{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:EPAYWHL3K7TI4OSRPIGXKONN3A","short_pith_number":"pith:EPAYWHL3","schema_version":"1.0","canonical_sha256":"23c18b1d7b57e68e3a517a0d7539add80b5e5cfcb7dbda652fc49facf8f0221b","source":{"kind":"arxiv","id":"1703.03253","version":1},"attestation_state":"computed","paper":{"title":"Doping-induced superconductivity of ZrB$_2$ and HfB$_2$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.supr-con","authors_text":"A. J. S. Machado, B. Delley, H.-R. Ott, J. Mesot, N. Barbero, T. Grant, T. Shiroka, Z. Fisk","submitted_at":"2017-03-09T13:06:56Z","abstract_excerpt":"Unlike the widely studied $s$-type two-gap superconductor MgB$_2$, the chemically similar compounds ZrB$_2$ and HfB$_2$ do not superconduct above 1 K. Yet, it has been shown that small amounts of self- or extrinsic doping (in particular with vanadium), can induce superconductivity in these materials. Based on results of different macro- and microscopic measurements, including magnetometry, nuclear magnetic resonance (NMR), resistivity, and muon-spin rotation ($\\mu$SR), we present a comparative study of Zr$_{0.96}$V$_{0.04}$B$_2$ and Hf$_{0.97}$V$_{0.03}$B$_2$. Their key magnetic and supercondu"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1703.03253","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2017-03-09T13:06:56Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"84c5401ddf33bffca1c09fbf268221177c9e6fc675bed4c7600a33149076e83f","abstract_canon_sha256":"7a0f1791f27fc45f6d9cfffe40731e4f45f5d67aa01bac8f9829204dca9214d2"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:49:00.934300Z","signature_b64":"d7c9RgCWHGVEJgen6X3ggEvLMkjOakxBWuzcBDvBc3hUWyfKw4E17XmEEDMzEw/9p6cKrxb3fNp8yN5q+n2fDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"23c18b1d7b57e68e3a517a0d7539add80b5e5cfcb7dbda652fc49facf8f0221b","last_reissued_at":"2026-05-18T00:49:00.933611Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:49:00.933611Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Doping-induced superconductivity of ZrB$_2$ and HfB$_2$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.supr-con","authors_text":"A. J. S. Machado, B. Delley, H.-R. Ott, J. Mesot, N. Barbero, T. Grant, T. Shiroka, Z. Fisk","submitted_at":"2017-03-09T13:06:56Z","abstract_excerpt":"Unlike the widely studied $s$-type two-gap superconductor MgB$_2$, the chemically similar compounds ZrB$_2$ and HfB$_2$ do not superconduct above 1 K. Yet, it has been shown that small amounts of self- or extrinsic doping (in particular with vanadium), can induce superconductivity in these materials. Based on results of different macro- and microscopic measurements, including magnetometry, nuclear magnetic resonance (NMR), resistivity, and muon-spin rotation ($\\mu$SR), we present a comparative study of Zr$_{0.96}$V$_{0.04}$B$_2$ and Hf$_{0.97}$V$_{0.03}$B$_2$. Their key magnetic and supercondu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.03253","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1703.03253","created_at":"2026-05-18T00:49:00.933729+00:00"},{"alias_kind":"arxiv_version","alias_value":"1703.03253v1","created_at":"2026-05-18T00:49:00.933729+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.03253","created_at":"2026-05-18T00:49:00.933729+00:00"},{"alias_kind":"pith_short_12","alias_value":"EPAYWHL3K7TI","created_at":"2026-05-18T12:31:12.930513+00:00"},{"alias_kind":"pith_short_16","alias_value":"EPAYWHL3K7TI4OSR","created_at":"2026-05-18T12:31:12.930513+00:00"},{"alias_kind":"pith_short_8","alias_value":"EPAYWHL3","created_at":"2026-05-18T12:31:12.930513+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/EPAYWHL3K7TI4OSRPIGXKONN3A","json":"https://pith.science/pith/EPAYWHL3K7TI4OSRPIGXKONN3A.json","graph_json":"https://pith.science/api/pith-number/EPAYWHL3K7TI4OSRPIGXKONN3A/graph.json","events_json":"https://pith.science/api/pith-number/EPAYWHL3K7TI4OSRPIGXKONN3A/events.json","paper":"https://pith.science/paper/EPAYWHL3"},"agent_actions":{"view_html":"https://pith.science/pith/EPAYWHL3K7TI4OSRPIGXKONN3A","download_json":"https://pith.science/pith/EPAYWHL3K7TI4OSRPIGXKONN3A.json","view_paper":"https://pith.science/paper/EPAYWHL3","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1703.03253&json=true","fetch_graph":"https://pith.science/api/pith-number/EPAYWHL3K7TI4OSRPIGXKONN3A/graph.json","fetch_events":"https://pith.science/api/pith-number/EPAYWHL3K7TI4OSRPIGXKONN3A/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/EPAYWHL3K7TI4OSRPIGXKONN3A/action/timestamp_anchor","attest_storage":"https://pith.science/pith/EPAYWHL3K7TI4OSRPIGXKONN3A/action/storage_attestation","attest_author":"https://pith.science/pith/EPAYWHL3K7TI4OSRPIGXKONN3A/action/author_attestation","sign_citation":"https://pith.science/pith/EPAYWHL3K7TI4OSRPIGXKONN3A/action/citation_signature","submit_replication":"https://pith.science/pith/EPAYWHL3K7TI4OSRPIGXKONN3A/action/replication_record"}},"created_at":"2026-05-18T00:49:00.933729+00:00","updated_at":"2026-05-18T00:49:00.933729+00:00"}