{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:BIHUS6WXRMPLENEGRZLCQ6O4VD","short_pith_number":"pith:BIHUS6WX","schema_version":"1.0","canonical_sha256":"0a0f497ad78b1eb234868e562879dca8f8d54156bc02a0a854438008302c8d39","source":{"kind":"arxiv","id":"0911.0256","version":1},"attestation_state":"computed","paper":{"title":"First-principles LDA+U and GGA+U study of neptunium dioxide","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Baotian Wang, Hongliang Shi, Ping Zhang, Weidong Li","submitted_at":"2009-11-02T08:43:46Z","abstract_excerpt":"We have performed a systematic first-principles investigation to calculate the electronic structures, mechanical properties, and phonon dispersion curves of NpO$_{2}$. The local density approximation$+U$ and the generalized gradient approximation$+U$ formalisms have been used to account for the strong on-site Coulomb repulsion among the localized Np $5f$ electrons. By choosing the Hubbard \\emph{U} parameter around 4 eV, the orbital occupancy characters of Np 5\\emph{f} and O 2\\emph{p} are in good agreement with recent experiments [J. Nucl. Mater. \\textbf{389}, 470 (2009)]. Comparing with our pr"},"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":"0911.0256","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2009-11-02T08:43:46Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"a60a88e4255770d54c33916ba7ee765783c055b6bc9cf5ddc3b3b58015b30f54","abstract_canon_sha256":"12e8d6424458967aa3215bcb2bf945a06760deec565ec3df867494b65331df97"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:11:00.779515Z","signature_b64":"PSWjOgP5ZoDpE160j/luTWOnN9erdObcm+EDiQjXXWkWBPtOpQealvweUYI2VrY1GDM0RenUFB0q6Zh/hQyOAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0a0f497ad78b1eb234868e562879dca8f8d54156bc02a0a854438008302c8d39","last_reissued_at":"2026-05-18T02:11:00.778745Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:11:00.778745Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"First-principles LDA+U and GGA+U study of neptunium dioxide","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Baotian Wang, Hongliang Shi, Ping Zhang, Weidong Li","submitted_at":"2009-11-02T08:43:46Z","abstract_excerpt":"We have performed a systematic first-principles investigation to calculate the electronic structures, mechanical properties, and phonon dispersion curves of NpO$_{2}$. The local density approximation$+U$ and the generalized gradient approximation$+U$ formalisms have been used to account for the strong on-site Coulomb repulsion among the localized Np $5f$ electrons. By choosing the Hubbard \\emph{U} parameter around 4 eV, the orbital occupancy characters of Np 5\\emph{f} and O 2\\emph{p} are in good agreement with recent experiments [J. Nucl. Mater. \\textbf{389}, 470 (2009)]. Comparing with our pr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0911.0256","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":"0911.0256","created_at":"2026-05-18T02:11:00.778884+00:00"},{"alias_kind":"arxiv_version","alias_value":"0911.0256v1","created_at":"2026-05-18T02:11:00.778884+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0911.0256","created_at":"2026-05-18T02:11:00.778884+00:00"},{"alias_kind":"pith_short_12","alias_value":"BIHUS6WXRMPL","created_at":"2026-05-18T12:25:58.837520+00:00"},{"alias_kind":"pith_short_16","alias_value":"BIHUS6WXRMPLENEG","created_at":"2026-05-18T12:25:58.837520+00:00"},{"alias_kind":"pith_short_8","alias_value":"BIHUS6WX","created_at":"2026-05-18T12:25:58.837520+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/BIHUS6WXRMPLENEGRZLCQ6O4VD","json":"https://pith.science/pith/BIHUS6WXRMPLENEGRZLCQ6O4VD.json","graph_json":"https://pith.science/api/pith-number/BIHUS6WXRMPLENEGRZLCQ6O4VD/graph.json","events_json":"https://pith.science/api/pith-number/BIHUS6WXRMPLENEGRZLCQ6O4VD/events.json","paper":"https://pith.science/paper/BIHUS6WX"},"agent_actions":{"view_html":"https://pith.science/pith/BIHUS6WXRMPLENEGRZLCQ6O4VD","download_json":"https://pith.science/pith/BIHUS6WXRMPLENEGRZLCQ6O4VD.json","view_paper":"https://pith.science/paper/BIHUS6WX","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0911.0256&json=true","fetch_graph":"https://pith.science/api/pith-number/BIHUS6WXRMPLENEGRZLCQ6O4VD/graph.json","fetch_events":"https://pith.science/api/pith-number/BIHUS6WXRMPLENEGRZLCQ6O4VD/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/BIHUS6WXRMPLENEGRZLCQ6O4VD/action/timestamp_anchor","attest_storage":"https://pith.science/pith/BIHUS6WXRMPLENEGRZLCQ6O4VD/action/storage_attestation","attest_author":"https://pith.science/pith/BIHUS6WXRMPLENEGRZLCQ6O4VD/action/author_attestation","sign_citation":"https://pith.science/pith/BIHUS6WXRMPLENEGRZLCQ6O4VD/action/citation_signature","submit_replication":"https://pith.science/pith/BIHUS6WXRMPLENEGRZLCQ6O4VD/action/replication_record"}},"created_at":"2026-05-18T02:11:00.778884+00:00","updated_at":"2026-05-18T02:11:00.778884+00:00"}