{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2023:OMAMYCDSDQKXPQGW4B6CIBX24D","short_pith_number":"pith:OMAMYCDS","schema_version":"1.0","canonical_sha256":"7300cc08721c1577c0d6e07c2406fae0f439650601976fb1ef6df4f5dd2c41a4","source":{"kind":"arxiv","id":"2310.14254","version":2},"attestation_state":"computed","paper":{"title":"Pressure-induced volumetric negative thermal expansion in CoZr2 superconductor","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cond-mat.supr-con"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Aichi Yamashita, Chizuru Kawashima, Hidetomo Usui, Hirokazu Kadobayashi, Hiroki Takahashi, Hiroto Arima, Kenta Oka, Ryo Matsumoto, Saori Kawaguchi-Imada, Takeshi Kawahata, Yoshihiko Takano, Yoshikazu Mizuguchi, Yuto Watanabe","submitted_at":"2023-10-22T10:40:25Z","abstract_excerpt":"We investigate the thermal expansion and superconducting properties of a CuAl2-type (tetragonal) superconductor CoZr2 under high pressures. We perform high-pressure synchrotron X-ray diffraction in a pressure range of 2.9 GPa < P < 10.4 GPa and discover that CoZr2 exhibits volumetric negative thermal expansion under high pressures. Although the uniaxial positive thermal expansion (PTE) along the a-axis is observed under ambient pressure, that is suppressed by pressure, while the large uniaxial negative thermal expansion (NTE) along the c-axis is maintained under the pressure regime. As a resul"},"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":"2310.14254","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2023-10-22T10:40:25Z","cross_cats_sorted":["cond-mat.supr-con"],"title_canon_sha256":"583a8769104c5eac9cde7e1c24dd544d286d31dd8ad2f57f7035187a20344825","abstract_canon_sha256":"4bdba1fd90334e040f4c04f0b5aeacaaffe62f5966f38d276427b31f9d75dea5"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T07:57:44.902814Z","signature_b64":"P+iNxkMo6CpmDzaVHLvK3ZaIPHtvu1Y8CIQTUg6SnoVVjPxiMqyDeOL0OaRp5Rils/HnSndVqOk1892cqfDCBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7300cc08721c1577c0d6e07c2406fae0f439650601976fb1ef6df4f5dd2c41a4","last_reissued_at":"2026-07-05T07:57:44.902248Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T07:57:44.902248Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Pressure-induced volumetric negative thermal expansion in CoZr2 superconductor","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cond-mat.supr-con"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Aichi Yamashita, Chizuru Kawashima, Hidetomo Usui, Hirokazu Kadobayashi, Hiroki Takahashi, Hiroto Arima, Kenta Oka, Ryo Matsumoto, Saori Kawaguchi-Imada, Takeshi Kawahata, Yoshihiko Takano, Yoshikazu Mizuguchi, Yuto Watanabe","submitted_at":"2023-10-22T10:40:25Z","abstract_excerpt":"We investigate the thermal expansion and superconducting properties of a CuAl2-type (tetragonal) superconductor CoZr2 under high pressures. We perform high-pressure synchrotron X-ray diffraction in a pressure range of 2.9 GPa < P < 10.4 GPa and discover that CoZr2 exhibits volumetric negative thermal expansion under high pressures. Although the uniaxial positive thermal expansion (PTE) along the a-axis is observed under ambient pressure, that is suppressed by pressure, while the large uniaxial negative thermal expansion (NTE) along the c-axis is maintained under the pressure regime. As a resul"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2310.14254","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/2310.14254/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2310.14254","created_at":"2026-07-05T07:57:44.902327+00:00"},{"alias_kind":"arxiv_version","alias_value":"2310.14254v2","created_at":"2026-07-05T07:57:44.902327+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2310.14254","created_at":"2026-07-05T07:57:44.902327+00:00"},{"alias_kind":"pith_short_12","alias_value":"OMAMYCDSDQKX","created_at":"2026-07-05T07:57:44.902327+00:00"},{"alias_kind":"pith_short_16","alias_value":"OMAMYCDSDQKXPQGW","created_at":"2026-07-05T07:57:44.902327+00:00"},{"alias_kind":"pith_short_8","alias_value":"OMAMYCDS","created_at":"2026-07-05T07:57:44.902327+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/OMAMYCDSDQKXPQGW4B6CIBX24D","json":"https://pith.science/pith/OMAMYCDSDQKXPQGW4B6CIBX24D.json","graph_json":"https://pith.science/api/pith-number/OMAMYCDSDQKXPQGW4B6CIBX24D/graph.json","events_json":"https://pith.science/api/pith-number/OMAMYCDSDQKXPQGW4B6CIBX24D/events.json","paper":"https://pith.science/paper/OMAMYCDS"},"agent_actions":{"view_html":"https://pith.science/pith/OMAMYCDSDQKXPQGW4B6CIBX24D","download_json":"https://pith.science/pith/OMAMYCDSDQKXPQGW4B6CIBX24D.json","view_paper":"https://pith.science/paper/OMAMYCDS","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2310.14254&json=true","fetch_graph":"https://pith.science/api/pith-number/OMAMYCDSDQKXPQGW4B6CIBX24D/graph.json","fetch_events":"https://pith.science/api/pith-number/OMAMYCDSDQKXPQGW4B6CIBX24D/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/OMAMYCDSDQKXPQGW4B6CIBX24D/action/timestamp_anchor","attest_storage":"https://pith.science/pith/OMAMYCDSDQKXPQGW4B6CIBX24D/action/storage_attestation","attest_author":"https://pith.science/pith/OMAMYCDSDQKXPQGW4B6CIBX24D/action/author_attestation","sign_citation":"https://pith.science/pith/OMAMYCDSDQKXPQGW4B6CIBX24D/action/citation_signature","submit_replication":"https://pith.science/pith/OMAMYCDSDQKXPQGW4B6CIBX24D/action/replication_record"}},"created_at":"2026-07-05T07:57:44.902327+00:00","updated_at":"2026-07-05T07:57:44.902327+00:00"}