{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2020:TIYMQA3SO5ID7NTTOAZ423MITU","short_pith_number":"pith:TIYMQA3S","schema_version":"1.0","canonical_sha256":"9a30c8037277503fb6737033cd6d889d040ebbdd1c9e53966b8a106cc4d6d430","source":{"kind":"arxiv","id":"2001.05305","version":3},"attestation_state":"computed","paper":{"title":"Stability and superconductivity of lanthanum and yttrium decahydrides","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"Alice M. Shipley, Chris J. Pickard, Mark S. Johnson, Michael J. Hutcheon, Richard J. Needs","submitted_at":"2020-01-15T13:25:51Z","abstract_excerpt":"Rare-earth hydrides can exhibit high-temperature superconductivity under high pressure. Here, we apply a crystal structure prediction method to the current record-holding $T_c$ material, LaH$_{10}$, and a candidate for even higher $T_c$, YH$_{10}$. We find a pressure-induced phase transition from the experimentally observed cubic LaH$_{10}$ phase to a new hexagonal phase at around 420 GPa. This hexagonal phase could explain experimental observations of hcp impurities in fcc samples. We find that YH$_{10}$ forms similar structures to LaH$_{10}$ and discuss the sensitivity of superconductivity c"},"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":"2001.05305","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2020-01-15T13:25:51Z","cross_cats_sorted":[],"title_canon_sha256":"242aa4b7b64680729e5641cb0e088130335c363765a3a3dedc31ee43cc36ac40","abstract_canon_sha256":"9853514d52a35d05ea1cc689ddb98c94c03f9981becb5b60cb7d3b3b5b2c5c61"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:12:34.309393Z","signature_b64":"zm/vKwdMy5ssU5Bb6oPYNsp6XqLaEEJlxg3sblzIORmg80XcBIkh6taZS2TE4aI60yKMnMUaoN0XAi0P9AOOAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9a30c8037277503fb6737033cd6d889d040ebbdd1c9e53966b8a106cc4d6d430","last_reissued_at":"2026-07-05T01:12:34.308942Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:12:34.308942Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Stability and superconductivity of lanthanum and yttrium decahydrides","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"Alice M. Shipley, Chris J. Pickard, Mark S. Johnson, Michael J. Hutcheon, Richard J. Needs","submitted_at":"2020-01-15T13:25:51Z","abstract_excerpt":"Rare-earth hydrides can exhibit high-temperature superconductivity under high pressure. Here, we apply a crystal structure prediction method to the current record-holding $T_c$ material, LaH$_{10}$, and a candidate for even higher $T_c$, YH$_{10}$. We find a pressure-induced phase transition from the experimentally observed cubic LaH$_{10}$ phase to a new hexagonal phase at around 420 GPa. This hexagonal phase could explain experimental observations of hcp impurities in fcc samples. We find that YH$_{10}$ forms similar structures to LaH$_{10}$ and discuss the sensitivity of superconductivity c"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2001.05305","kind":"arxiv","version":3},"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/2001.05305/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":"2001.05305","created_at":"2026-07-05T01:12:34.308995+00:00"},{"alias_kind":"arxiv_version","alias_value":"2001.05305v3","created_at":"2026-07-05T01:12:34.308995+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2001.05305","created_at":"2026-07-05T01:12:34.308995+00:00"},{"alias_kind":"pith_short_12","alias_value":"TIYMQA3SO5ID","created_at":"2026-07-05T01:12:34.308995+00:00"},{"alias_kind":"pith_short_16","alias_value":"TIYMQA3SO5ID7NTT","created_at":"2026-07-05T01:12:34.308995+00:00"},{"alias_kind":"pith_short_8","alias_value":"TIYMQA3S","created_at":"2026-07-05T01:12:34.308995+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/TIYMQA3SO5ID7NTTOAZ423MITU","json":"https://pith.science/pith/TIYMQA3SO5ID7NTTOAZ423MITU.json","graph_json":"https://pith.science/api/pith-number/TIYMQA3SO5ID7NTTOAZ423MITU/graph.json","events_json":"https://pith.science/api/pith-number/TIYMQA3SO5ID7NTTOAZ423MITU/events.json","paper":"https://pith.science/paper/TIYMQA3S"},"agent_actions":{"view_html":"https://pith.science/pith/TIYMQA3SO5ID7NTTOAZ423MITU","download_json":"https://pith.science/pith/TIYMQA3SO5ID7NTTOAZ423MITU.json","view_paper":"https://pith.science/paper/TIYMQA3S","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2001.05305&json=true","fetch_graph":"https://pith.science/api/pith-number/TIYMQA3SO5ID7NTTOAZ423MITU/graph.json","fetch_events":"https://pith.science/api/pith-number/TIYMQA3SO5ID7NTTOAZ423MITU/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/TIYMQA3SO5ID7NTTOAZ423MITU/action/timestamp_anchor","attest_storage":"https://pith.science/pith/TIYMQA3SO5ID7NTTOAZ423MITU/action/storage_attestation","attest_author":"https://pith.science/pith/TIYMQA3SO5ID7NTTOAZ423MITU/action/author_attestation","sign_citation":"https://pith.science/pith/TIYMQA3SO5ID7NTTOAZ423MITU/action/citation_signature","submit_replication":"https://pith.science/pith/TIYMQA3SO5ID7NTTOAZ423MITU/action/replication_record"}},"created_at":"2026-07-05T01:12:34.308995+00:00","updated_at":"2026-07-05T01:12:34.308995+00:00"}