{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:ZRL4K72GVFZ2MGQW2GLQV5AXBN","short_pith_number":"pith:ZRL4K72G","canonical_record":{"source":{"id":"2008.11424","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2020-08-26T07:43:12Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"7aa45902dc1ee690289f5904d6521b51e7aa90a026bc9f705d88fdf8f6861db1","abstract_canon_sha256":"acaffc658dde74f064fb6a40ac3db452bd0c0146d753fe459a2de55136759e61"},"schema_version":"1.0"},"canonical_sha256":"cc57c57f46a973a61a16d1970af4170b7973e3ffabca36ade51fe71debd340a8","source":{"kind":"arxiv","id":"2008.11424","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2008.11424","created_at":"2026-07-05T01:33:22Z"},{"alias_kind":"arxiv_version","alias_value":"2008.11424v2","created_at":"2026-07-05T01:33:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2008.11424","created_at":"2026-07-05T01:33:22Z"},{"alias_kind":"pith_short_12","alias_value":"ZRL4K72GVFZ2","created_at":"2026-07-05T01:33:22Z"},{"alias_kind":"pith_short_16","alias_value":"ZRL4K72GVFZ2MGQW","created_at":"2026-07-05T01:33:22Z"},{"alias_kind":"pith_short_8","alias_value":"ZRL4K72G","created_at":"2026-07-05T01:33:22Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:ZRL4K72GVFZ2MGQW2GLQV5AXBN","target":"record","payload":{"canonical_record":{"source":{"id":"2008.11424","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2020-08-26T07:43:12Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"7aa45902dc1ee690289f5904d6521b51e7aa90a026bc9f705d88fdf8f6861db1","abstract_canon_sha256":"acaffc658dde74f064fb6a40ac3db452bd0c0146d753fe459a2de55136759e61"},"schema_version":"1.0"},"canonical_sha256":"cc57c57f46a973a61a16d1970af4170b7973e3ffabca36ade51fe71debd340a8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T01:33:22.624055Z","signature_b64":"EDF8ibgHUZ8X3CR9tc3LOEUkK6Cb2dVPpy87KNM+/WaT8qYmHcDoMCBRgESTqvDjjOlYlf6OetI62RLx8XpoDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cc57c57f46a973a61a16d1970af4170b7973e3ffabca36ade51fe71debd340a8","last_reissued_at":"2026-07-05T01:33:22.623597Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T01:33:22.623597Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2008.11424","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":"2026-07-05T01:33:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HW8u6LadpqpWObLzotat2gIvY8r6hBLafNZeV/kmtZHMixbUZttbekOy3Ua2aNQms9M8l6wq8w3lWrY8LFNbCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-11T20:56:22.869809Z"},"content_sha256":"c3b16d6c9e90ceb361907ea5dd18f9b218aa7a2f8ca48b806200a5bcd6ea6a92","schema_version":"1.0","event_id":"sha256:c3b16d6c9e90ceb361907ea5dd18f9b218aa7a2f8ca48b806200a5bcd6ea6a92"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:ZRL4K72GVFZ2MGQW2GLQV5AXBN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Stabilization of Nonmagnetic Hexagonal Close-Packed Phase in Nanocrystalline Nickel Metal with a Giant Volume Expansion","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Hirofumi Ishii, Kenta Akashi, Koji Ishibashi, Ku-Ding Tsuei, Masashi Nantoh, Miki Kakihara, Satoshi Suehiro, Sho Otsuru, Takuto Tsukahara, Tatsuya Kawae, Tetsuya Kida, Yen-Fa Liao, Yoichi Ishiwata, Yuji Inagaki","submitted_at":"2020-08-26T07:43:12Z","abstract_excerpt":"Nanocrystalline Ni can adopt a hexagonal close-packed (hcp) structure,which does not appear in a bulk form under any conditions.Structural studies found its $>$ 20% expansion of volume per atom compared with face-centered cubic (fcc) Ni.Hard x-ray photoemission spectroscopy of the hcp phase revealed a $>$ 0.14 valence electron transfer from 3$d$ to 4$s$ and 4$p$ orbitals and a 0.25 eV reduction in band energy per electron compared with the fcc phase.Its nonmagnetic nature was attributed to a low density of states at the Fermi level.Thermodynamic stability of the hcp phase can be explained by t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2008.11424","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/2008.11424/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":"2026-07-05T01:33:22Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"QsbH7SmZg/vOUQOeJKazramnPae5WC2NKFBxT8opEV69Y9h7lTyQ0fy/pA3ntnCeur8gE8bqKFTTcT5qKAFpBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-11T20:56:22.870177Z"},"content_sha256":"a119095a5d21a8eb520ecbd5771e599985200319a27a54c7f9c400a010926eb2","schema_version":"1.0","event_id":"sha256:a119095a5d21a8eb520ecbd5771e599985200319a27a54c7f9c400a010926eb2"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZRL4K72GVFZ2MGQW2GLQV5AXBN/bundle.json","state_url":"https://pith.science/pith/ZRL4K72GVFZ2MGQW2GLQV5AXBN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZRL4K72GVFZ2MGQW2GLQV5AXBN/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":"2026-07-11T20:56:22Z","links":{"resolver":"https://pith.science/pith/ZRL4K72GVFZ2MGQW2GLQV5AXBN","bundle":"https://pith.science/pith/ZRL4K72GVFZ2MGQW2GLQV5AXBN/bundle.json","state":"https://pith.science/pith/ZRL4K72GVFZ2MGQW2GLQV5AXBN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZRL4K72GVFZ2MGQW2GLQV5AXBN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:ZRL4K72GVFZ2MGQW2GLQV5AXBN","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":"acaffc658dde74f064fb6a40ac3db452bd0c0146d753fe459a2de55136759e61","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2020-08-26T07:43:12Z","title_canon_sha256":"7aa45902dc1ee690289f5904d6521b51e7aa90a026bc9f705d88fdf8f6861db1"},"schema_version":"1.0","source":{"id":"2008.11424","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2008.11424","created_at":"2026-07-05T01:33:22Z"},{"alias_kind":"arxiv_version","alias_value":"2008.11424v2","created_at":"2026-07-05T01:33:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2008.11424","created_at":"2026-07-05T01:33:22Z"},{"alias_kind":"pith_short_12","alias_value":"ZRL4K72GVFZ2","created_at":"2026-07-05T01:33:22Z"},{"alias_kind":"pith_short_16","alias_value":"ZRL4K72GVFZ2MGQW","created_at":"2026-07-05T01:33:22Z"},{"alias_kind":"pith_short_8","alias_value":"ZRL4K72G","created_at":"2026-07-05T01:33:22Z"}],"graph_snapshots":[{"event_id":"sha256:a119095a5d21a8eb520ecbd5771e599985200319a27a54c7f9c400a010926eb2","target":"graph","created_at":"2026-07-05T01:33:22Z","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/2008.11424/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Nanocrystalline Ni can adopt a hexagonal close-packed (hcp) structure,which does not appear in a bulk form under any conditions.Structural studies found its $>$ 20% expansion of volume per atom compared with face-centered cubic (fcc) Ni.Hard x-ray photoemission spectroscopy of the hcp phase revealed a $>$ 0.14 valence electron transfer from 3$d$ to 4$s$ and 4$p$ orbitals and a 0.25 eV reduction in band energy per electron compared with the fcc phase.Its nonmagnetic nature was attributed to a low density of states at the Fermi level.Thermodynamic stability of the hcp phase can be explained by t","authors_text":"Hirofumi Ishii, Kenta Akashi, Koji Ishibashi, Ku-Ding Tsuei, Masashi Nantoh, Miki Kakihara, Satoshi Suehiro, Sho Otsuru, Takuto Tsukahara, Tatsuya Kawae, Tetsuya Kida, Yen-Fa Liao, Yoichi Ishiwata, Yuji Inagaki","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2020-08-26T07:43:12Z","title":"Stabilization of Nonmagnetic Hexagonal Close-Packed Phase in Nanocrystalline Nickel Metal with a Giant Volume Expansion"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2008.11424","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:c3b16d6c9e90ceb361907ea5dd18f9b218aa7a2f8ca48b806200a5bcd6ea6a92","target":"record","created_at":"2026-07-05T01:33:22Z","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":"acaffc658dde74f064fb6a40ac3db452bd0c0146d753fe459a2de55136759e61","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2020-08-26T07:43:12Z","title_canon_sha256":"7aa45902dc1ee690289f5904d6521b51e7aa90a026bc9f705d88fdf8f6861db1"},"schema_version":"1.0","source":{"id":"2008.11424","kind":"arxiv","version":2}},"canonical_sha256":"cc57c57f46a973a61a16d1970af4170b7973e3ffabca36ade51fe71debd340a8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cc57c57f46a973a61a16d1970af4170b7973e3ffabca36ade51fe71debd340a8","first_computed_at":"2026-07-05T01:33:22.623597Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:33:22.623597Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"EDF8ibgHUZ8X3CR9tc3LOEUkK6Cb2dVPpy87KNM+/WaT8qYmHcDoMCBRgESTqvDjjOlYlf6OetI62RLx8XpoDg==","signature_status":"signed_v1","signed_at":"2026-07-05T01:33:22.624055Z","signed_message":"canonical_sha256_bytes"},"source_id":"2008.11424","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c3b16d6c9e90ceb361907ea5dd18f9b218aa7a2f8ca48b806200a5bcd6ea6a92","sha256:a119095a5d21a8eb520ecbd5771e599985200319a27a54c7f9c400a010926eb2"],"state_sha256":"93822f819f04175271f93f9c3d2863ad0a31a64568e90d9c9631829f16e01957"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JMuNIED6DsnMsOSjgsxHVM1Yw6vinmtg10lB0yGq6NvbYUW7GWwoWt5NUUqX0xTdWRMDVEBMfN9hoirajomNDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-11T20:56:22.872611Z","bundle_sha256":"de164d915ca117db3b9412a5ce8b8c8b1ccd83f97986d72000a3ad9a8537dbb9"}}