{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:KWR6G37PA47RKRHW6VBWOSTEOH","short_pith_number":"pith:KWR6G37P","schema_version":"1.0","canonical_sha256":"55a3e36fef073f1544f6f543674a6471c71eeb62c6ef6a8b45c736198faaffcc","source":{"kind":"arxiv","id":"1805.04644","version":1},"attestation_state":"computed","paper":{"title":"Observation of a nodal chain with Dirac surface states in TiB2","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"B.-B. Fu, B. Q. Lv, C.-J. Yi, G. Li, H. Ding, M. Li, M. Shi, M. Yang, Oleg V. Yazyev, P. Richard, Q. S. Wu, T. Qian, X. Gao, X.-L. Peng, Y.-B. Huang, Y.-G. Shi","submitted_at":"2018-05-12T03:45:56Z","abstract_excerpt":"Topological nodal-line semimetals (TNLSMs) are characterized by symmetry-protected band crossings extending along one-dimensional lines in momentum space. The nodal lines exhibit a variety of possible configurations, such as nodal ring, nodal link, nodal chain, and nodal knot. Here, using angle-resolved photoemission spectroscopy, we observe nodal rings in the orthogonal kz = 0 and kx = 0 planes of the Brillouin zone in TiB2. The nodal rings connect with each other on the intersecting line {\\Gamma}-K of the orthogonal planes, forming a remarkable nodal-chain structure. Furthermore, we observe "},"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":"1805.04644","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-05-12T03:45:56Z","cross_cats_sorted":[],"title_canon_sha256":"e49b6d4148c77648e1fd84d82577f3c44303482ec3dc737c8719e3f7db7d2b6f","abstract_canon_sha256":"a1a918726a32851cc901e6e5e02c616c49e3b93eb4e3a47e0cf0d3f0db384515"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:16:06.817773Z","signature_b64":"/1VPqqKsZSgAcolRgxmlArbJaNRafzrLKpinEev4ePfb/xbcdEAe4DIdMRIBsrSh+MlnWO+Fz+3MLpZbOqJVDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"55a3e36fef073f1544f6f543674a6471c71eeb62c6ef6a8b45c736198faaffcc","last_reissued_at":"2026-05-18T00:16:06.817250Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:16:06.817250Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Observation of a nodal chain with Dirac surface states in TiB2","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"B.-B. Fu, B. Q. Lv, C.-J. Yi, G. Li, H. Ding, M. Li, M. Shi, M. Yang, Oleg V. Yazyev, P. Richard, Q. S. Wu, T. Qian, X. Gao, X.-L. Peng, Y.-B. Huang, Y.-G. Shi","submitted_at":"2018-05-12T03:45:56Z","abstract_excerpt":"Topological nodal-line semimetals (TNLSMs) are characterized by symmetry-protected band crossings extending along one-dimensional lines in momentum space. The nodal lines exhibit a variety of possible configurations, such as nodal ring, nodal link, nodal chain, and nodal knot. Here, using angle-resolved photoemission spectroscopy, we observe nodal rings in the orthogonal kz = 0 and kx = 0 planes of the Brillouin zone in TiB2. The nodal rings connect with each other on the intersecting line {\\Gamma}-K of the orthogonal planes, forming a remarkable nodal-chain structure. Furthermore, we observe "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.04644","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":"1805.04644","created_at":"2026-05-18T00:16:06.817331+00:00"},{"alias_kind":"arxiv_version","alias_value":"1805.04644v1","created_at":"2026-05-18T00:16:06.817331+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.04644","created_at":"2026-05-18T00:16:06.817331+00:00"},{"alias_kind":"pith_short_12","alias_value":"KWR6G37PA47R","created_at":"2026-05-18T12:32:33.847187+00:00"},{"alias_kind":"pith_short_16","alias_value":"KWR6G37PA47RKRHW","created_at":"2026-05-18T12:32:33.847187+00:00"},{"alias_kind":"pith_short_8","alias_value":"KWR6G37P","created_at":"2026-05-18T12:32:33.847187+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/KWR6G37PA47RKRHW6VBWOSTEOH","json":"https://pith.science/pith/KWR6G37PA47RKRHW6VBWOSTEOH.json","graph_json":"https://pith.science/api/pith-number/KWR6G37PA47RKRHW6VBWOSTEOH/graph.json","events_json":"https://pith.science/api/pith-number/KWR6G37PA47RKRHW6VBWOSTEOH/events.json","paper":"https://pith.science/paper/KWR6G37P"},"agent_actions":{"view_html":"https://pith.science/pith/KWR6G37PA47RKRHW6VBWOSTEOH","download_json":"https://pith.science/pith/KWR6G37PA47RKRHW6VBWOSTEOH.json","view_paper":"https://pith.science/paper/KWR6G37P","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1805.04644&json=true","fetch_graph":"https://pith.science/api/pith-number/KWR6G37PA47RKRHW6VBWOSTEOH/graph.json","fetch_events":"https://pith.science/api/pith-number/KWR6G37PA47RKRHW6VBWOSTEOH/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/KWR6G37PA47RKRHW6VBWOSTEOH/action/timestamp_anchor","attest_storage":"https://pith.science/pith/KWR6G37PA47RKRHW6VBWOSTEOH/action/storage_attestation","attest_author":"https://pith.science/pith/KWR6G37PA47RKRHW6VBWOSTEOH/action/author_attestation","sign_citation":"https://pith.science/pith/KWR6G37PA47RKRHW6VBWOSTEOH/action/citation_signature","submit_replication":"https://pith.science/pith/KWR6G37PA47RKRHW6VBWOSTEOH/action/replication_record"}},"created_at":"2026-05-18T00:16:06.817331+00:00","updated_at":"2026-05-18T00:16:06.817331+00:00"}