{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:65OHI73ZOLD4ZNCPUTQOOWYRFJ","short_pith_number":"pith:65OHI73Z","canonical_record":{"source":{"id":"2007.03969","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2020-07-08T08:56:35Z","cross_cats_sorted":[],"title_canon_sha256":"55890d21ed27920f86c27825bd32fbdf9835f8cc2622c3d9be5323d2519627f9","abstract_canon_sha256":"7aab05b4257e3bf52f83f16ddde393e10b75db32fb5d5feb89da410bed9ee51a"},"schema_version":"1.0"},"canonical_sha256":"f75c747f7972c7ccb44fa4e0e75b112a59b716e12e5ab18995baa5a325e8a6e6","source":{"kind":"arxiv","id":"2007.03969","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.03969","created_at":"2026-07-05T01:37:13Z"},{"alias_kind":"arxiv_version","alias_value":"2007.03969v2","created_at":"2026-07-05T01:37:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.03969","created_at":"2026-07-05T01:37:13Z"},{"alias_kind":"pith_short_12","alias_value":"65OHI73ZOLD4","created_at":"2026-07-05T01:37:13Z"},{"alias_kind":"pith_short_16","alias_value":"65OHI73ZOLD4ZNCP","created_at":"2026-07-05T01:37:13Z"},{"alias_kind":"pith_short_8","alias_value":"65OHI73Z","created_at":"2026-07-05T01:37:13Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:65OHI73ZOLD4ZNCPUTQOOWYRFJ","target":"record","payload":{"canonical_record":{"source":{"id":"2007.03969","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2020-07-08T08:56:35Z","cross_cats_sorted":[],"title_canon_sha256":"55890d21ed27920f86c27825bd32fbdf9835f8cc2622c3d9be5323d2519627f9","abstract_canon_sha256":"7aab05b4257e3bf52f83f16ddde393e10b75db32fb5d5feb89da410bed9ee51a"},"schema_version":"1.0"},"canonical_sha256":"f75c747f7972c7ccb44fa4e0e75b112a59b716e12e5ab18995baa5a325e8a6e6","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:37:13.355126Z","signature_b64":"B+XS7kR+4ZzOh3wInd3PBH06+t0RLjknN/lhq+/R/RBSF/KcV84q+ftSfebzARZA7OAQIiRK1xxoDXZbEFjhDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f75c747f7972c7ccb44fa4e0e75b112a59b716e12e5ab18995baa5a325e8a6e6","last_reissued_at":"2026-07-05T01:37:13.354755Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:37:13.354755Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2007.03969","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T01:37:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qHH7TlVXRoTXSsTGCOHw4Ku6N2/u07fIywqZfzkGUrvmG3QUsWyBFD8jJJpkzCgluaIC7uCf5/ibeXJPttKUBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-21T03:30:33.880105Z"},"content_sha256":"aae5b0b30093369102020a2dfcab26b3ded2f5b0a9916f20e5ec6c517c0c198c","schema_version":"1.0","event_id":"sha256:aae5b0b30093369102020a2dfcab26b3ded2f5b0a9916f20e5ec6c517c0c198c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:65OHI73ZOLD4ZNCPUTQOOWYRFJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Experimental evidence for orthorhombic Fddd crystal structure in elemental yttrium above 100 GPa","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"Israel Osmond, Jonathan Buhot, Owen Moulding, Sven Friedemann, Takaki Muramatsu","submitted_at":"2020-07-08T08:56:35Z","abstract_excerpt":"We present electrical resistance measurements of elemental yttrium on bulk and film samples, and both exhibit superconductivity at very high pressures. We show that the pressure dependence of the superconducting transition temperature above 100 GPa is in good agreement with the predicted Fddd phase by Chen et al. [Phys. Rev. lett. 109, 157004 (2012)]. This result together with a new Rietveld refinement made on X-ray data at 123 GPa from Samudrala et al. [J. Phys. Condens. Matter 24, 362201 (2012)] offer strong evidence that the atomic structure of yttrium above 100 GPa is orthorhombic Fddd. Fu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.03969","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/2007.03969/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T01:37:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"05XGfOI5bEOO0zF4OLiyeGGI1bz/AMi8ykfavobCoVZl5izb9igLlpX78g7NgsnkbnGkGaISplMzIPmJhW/LDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-21T03:30:33.880505Z"},"content_sha256":"a9b0097f1d09a484a704fed805c5aafe71cedc59a18176c1f55305ebc98c1928","schema_version":"1.0","event_id":"sha256:a9b0097f1d09a484a704fed805c5aafe71cedc59a18176c1f55305ebc98c1928"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/65OHI73ZOLD4ZNCPUTQOOWYRFJ/bundle.json","state_url":"https://pith.science/pith/65OHI73ZOLD4ZNCPUTQOOWYRFJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/65OHI73ZOLD4ZNCPUTQOOWYRFJ/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-07-21T03:30:33Z","links":{"resolver":"https://pith.science/pith/65OHI73ZOLD4ZNCPUTQOOWYRFJ","bundle":"https://pith.science/pith/65OHI73ZOLD4ZNCPUTQOOWYRFJ/bundle.json","state":"https://pith.science/pith/65OHI73ZOLD4ZNCPUTQOOWYRFJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/65OHI73ZOLD4ZNCPUTQOOWYRFJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:65OHI73ZOLD4ZNCPUTQOOWYRFJ","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":"7aab05b4257e3bf52f83f16ddde393e10b75db32fb5d5feb89da410bed9ee51a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2020-07-08T08:56:35Z","title_canon_sha256":"55890d21ed27920f86c27825bd32fbdf9835f8cc2622c3d9be5323d2519627f9"},"schema_version":"1.0","source":{"id":"2007.03969","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2007.03969","created_at":"2026-07-05T01:37:13Z"},{"alias_kind":"arxiv_version","alias_value":"2007.03969v2","created_at":"2026-07-05T01:37:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2007.03969","created_at":"2026-07-05T01:37:13Z"},{"alias_kind":"pith_short_12","alias_value":"65OHI73ZOLD4","created_at":"2026-07-05T01:37:13Z"},{"alias_kind":"pith_short_16","alias_value":"65OHI73ZOLD4ZNCP","created_at":"2026-07-05T01:37:13Z"},{"alias_kind":"pith_short_8","alias_value":"65OHI73Z","created_at":"2026-07-05T01:37:13Z"}],"graph_snapshots":[{"event_id":"sha256:a9b0097f1d09a484a704fed805c5aafe71cedc59a18176c1f55305ebc98c1928","target":"graph","created_at":"2026-07-05T01:37:13Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2007.03969/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We present electrical resistance measurements of elemental yttrium on bulk and film samples, and both exhibit superconductivity at very high pressures. We show that the pressure dependence of the superconducting transition temperature above 100 GPa is in good agreement with the predicted Fddd phase by Chen et al. [Phys. Rev. lett. 109, 157004 (2012)]. This result together with a new Rietveld refinement made on X-ray data at 123 GPa from Samudrala et al. [J. Phys. Condens. Matter 24, 362201 (2012)] offer strong evidence that the atomic structure of yttrium above 100 GPa is orthorhombic Fddd. Fu","authors_text":"Israel Osmond, Jonathan Buhot, Owen Moulding, Sven Friedemann, Takaki Muramatsu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2020-07-08T08:56:35Z","title":"Experimental evidence for orthorhombic Fddd crystal structure in elemental yttrium above 100 GPa"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2007.03969","kind":"arxiv","version":2},"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:aae5b0b30093369102020a2dfcab26b3ded2f5b0a9916f20e5ec6c517c0c198c","target":"record","created_at":"2026-07-05T01:37:13Z","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":"7aab05b4257e3bf52f83f16ddde393e10b75db32fb5d5feb89da410bed9ee51a","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2020-07-08T08:56:35Z","title_canon_sha256":"55890d21ed27920f86c27825bd32fbdf9835f8cc2622c3d9be5323d2519627f9"},"schema_version":"1.0","source":{"id":"2007.03969","kind":"arxiv","version":2}},"canonical_sha256":"f75c747f7972c7ccb44fa4e0e75b112a59b716e12e5ab18995baa5a325e8a6e6","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f75c747f7972c7ccb44fa4e0e75b112a59b716e12e5ab18995baa5a325e8a6e6","first_computed_at":"2026-07-05T01:37:13.354755Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:37:13.354755Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"B+XS7kR+4ZzOh3wInd3PBH06+t0RLjknN/lhq+/R/RBSF/KcV84q+ftSfebzARZA7OAQIiRK1xxoDXZbEFjhDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T01:37:13.355126Z","signed_message":"canonical_sha256_bytes"},"source_id":"2007.03969","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:aae5b0b30093369102020a2dfcab26b3ded2f5b0a9916f20e5ec6c517c0c198c","sha256:a9b0097f1d09a484a704fed805c5aafe71cedc59a18176c1f55305ebc98c1928"],"state_sha256":"746a0d85bf181c6ef05c21a661760f651882b99cc066ab4be3bad6ec66824ccf"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3J5XBhxVKStfJemjBplNXmdPQMIvG7TvcwLNDaBQnioUSdmDpNRsYyCeutKhz+9PoTDwktZDPLYOt4gTpFcwCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-21T03:30:33.883020Z","bundle_sha256":"449d09dac9a5214e140d37d9cd7658b7bece7e20918d81755199d0ed83f51972"}}