{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:PT5M34TIIJI2SYSBH4QDB6XDQC","short_pith_number":"pith:PT5M34TI","canonical_record":{"source":{"id":"1802.08978","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-02-25T09:50:50Z","cross_cats_sorted":[],"title_canon_sha256":"30d7e24f063466a8298bca3ced36a30bd6b2be3d637b7d15a95f88fd395b00f5","abstract_canon_sha256":"3e0cb727ebaa647be18c1ca5db6f27a62de1ccf01fd4c3fb14e06fd743f555a1"},"schema_version":"1.0"},"canonical_sha256":"7cfacdf2684251a962413f2030fae380bd7b986f427c6264093714f1c7840bdd","source":{"kind":"arxiv","id":"1802.08978","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.08978","created_at":"2026-05-18T00:22:35Z"},{"alias_kind":"arxiv_version","alias_value":"1802.08978v1","created_at":"2026-05-18T00:22:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.08978","created_at":"2026-05-18T00:22:35Z"},{"alias_kind":"pith_short_12","alias_value":"PT5M34TIIJI2","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_16","alias_value":"PT5M34TIIJI2SYSB","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_8","alias_value":"PT5M34TI","created_at":"2026-05-18T12:32:46Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:PT5M34TIIJI2SYSBH4QDB6XDQC","target":"record","payload":{"canonical_record":{"source":{"id":"1802.08978","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-02-25T09:50:50Z","cross_cats_sorted":[],"title_canon_sha256":"30d7e24f063466a8298bca3ced36a30bd6b2be3d637b7d15a95f88fd395b00f5","abstract_canon_sha256":"3e0cb727ebaa647be18c1ca5db6f27a62de1ccf01fd4c3fb14e06fd743f555a1"},"schema_version":"1.0"},"canonical_sha256":"7cfacdf2684251a962413f2030fae380bd7b986f427c6264093714f1c7840bdd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:22:35.868881Z","signature_b64":"PiRr6TsskZTg0ozjAcQRuXWVNZJM69vRg2cnEmnLIvF3vtj+zeH10juyoVwekExpy56yiTJyB9ExebHYlcmeAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7cfacdf2684251a962413f2030fae380bd7b986f427c6264093714f1c7840bdd","last_reissued_at":"2026-05-18T00:22:35.868254Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:22:35.868254Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1802.08978","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:22:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"F7L8QQXELtNq3Xig0YwrBhngSlmJ2ILFUfueGQCxJqFPejh6oZjG/6U5DzFkKMVnkHSHde1runqZQ4+QjjrjCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T15:34:41.342187Z"},"content_sha256":"81d41b3bea0f270874da932eca0e43f6d691f58ae4850e4ce61158539feadcb1","schema_version":"1.0","event_id":"sha256:81d41b3bea0f270874da932eca0e43f6d691f58ae4850e4ce61158539feadcb1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:PT5M34TIIJI2SYSBH4QDB6XDQC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spatial-resolved X-ray photoelectron spectroscopy of Weyl semimetal NbAs","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"G.-F. Chen, G. H. Zhang, H. Ding, H. W. Liu, L. X. Zhao, P. Richard","submitted_at":"2018-02-25T09:50:50Z","abstract_excerpt":"We utilized X-ray photoemission electron microscopy (XPEEM) and X-ray photoelectron spectroscopy (XPS) to investigate the crystal surface of Weyl semimetal NbAs. XPEEM images present white and black contrast in both the Nb 3d and As 3d core level spectra. Surface-sensitive XPS spectra indicate that the entire surface of the sample contains both surface states of Nb 3d and As 3d, in form of oxides, and bulk states of NbAs. Estimated atomic percentage values nNb/nAs suggest that the surface is Nb-rich and asymmetric for white and black areas."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.08978","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:22:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"U56cq8NcSFHE+LU1WpkhBCoDS4MZZPQQ+9EnQgjbpVwnBkV+BWLIlP3SYSguf6qT2OCYbWu558L7VnFUl0N0Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T15:34:41.342539Z"},"content_sha256":"753a5cf0bfc994114be6eb2f20de47153fd8ed72659a7e64b9b81669c72416ab","schema_version":"1.0","event_id":"sha256:753a5cf0bfc994114be6eb2f20de47153fd8ed72659a7e64b9b81669c72416ab"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/PT5M34TIIJI2SYSBH4QDB6XDQC/bundle.json","state_url":"https://pith.science/pith/PT5M34TIIJI2SYSBH4QDB6XDQC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/PT5M34TIIJI2SYSBH4QDB6XDQC/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":"2026-05-28T15:34:41Z","links":{"resolver":"https://pith.science/pith/PT5M34TIIJI2SYSBH4QDB6XDQC","bundle":"https://pith.science/pith/PT5M34TIIJI2SYSBH4QDB6XDQC/bundle.json","state":"https://pith.science/pith/PT5M34TIIJI2SYSBH4QDB6XDQC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/PT5M34TIIJI2SYSBH4QDB6XDQC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:PT5M34TIIJI2SYSBH4QDB6XDQC","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":"3e0cb727ebaa647be18c1ca5db6f27a62de1ccf01fd4c3fb14e06fd743f555a1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-02-25T09:50:50Z","title_canon_sha256":"30d7e24f063466a8298bca3ced36a30bd6b2be3d637b7d15a95f88fd395b00f5"},"schema_version":"1.0","source":{"id":"1802.08978","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.08978","created_at":"2026-05-18T00:22:35Z"},{"alias_kind":"arxiv_version","alias_value":"1802.08978v1","created_at":"2026-05-18T00:22:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.08978","created_at":"2026-05-18T00:22:35Z"},{"alias_kind":"pith_short_12","alias_value":"PT5M34TIIJI2","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_16","alias_value":"PT5M34TIIJI2SYSB","created_at":"2026-05-18T12:32:46Z"},{"alias_kind":"pith_short_8","alias_value":"PT5M34TI","created_at":"2026-05-18T12:32:46Z"}],"graph_snapshots":[{"event_id":"sha256:753a5cf0bfc994114be6eb2f20de47153fd8ed72659a7e64b9b81669c72416ab","target":"graph","created_at":"2026-05-18T00:22:35Z","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"},"paper":{"abstract_excerpt":"We utilized X-ray photoemission electron microscopy (XPEEM) and X-ray photoelectron spectroscopy (XPS) to investigate the crystal surface of Weyl semimetal NbAs. XPEEM images present white and black contrast in both the Nb 3d and As 3d core level spectra. Surface-sensitive XPS spectra indicate that the entire surface of the sample contains both surface states of Nb 3d and As 3d, in form of oxides, and bulk states of NbAs. Estimated atomic percentage values nNb/nAs suggest that the surface is Nb-rich and asymmetric for white and black areas.","authors_text":"G.-F. Chen, G. H. Zhang, H. Ding, H. W. Liu, L. X. Zhao, P. Richard","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-02-25T09:50:50Z","title":"Spatial-resolved X-ray photoelectron spectroscopy of Weyl semimetal NbAs"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.08978","kind":"arxiv","version":1},"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":"sha256:81d41b3bea0f270874da932eca0e43f6d691f58ae4850e4ce61158539feadcb1","target":"record","created_at":"2026-05-18T00:22:35Z","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":"3e0cb727ebaa647be18c1ca5db6f27a62de1ccf01fd4c3fb14e06fd743f555a1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2018-02-25T09:50:50Z","title_canon_sha256":"30d7e24f063466a8298bca3ced36a30bd6b2be3d637b7d15a95f88fd395b00f5"},"schema_version":"1.0","source":{"id":"1802.08978","kind":"arxiv","version":1}},"canonical_sha256":"7cfacdf2684251a962413f2030fae380bd7b986f427c6264093714f1c7840bdd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"7cfacdf2684251a962413f2030fae380bd7b986f427c6264093714f1c7840bdd","first_computed_at":"2026-05-18T00:22:35.868254Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:22:35.868254Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PiRr6TsskZTg0ozjAcQRuXWVNZJM69vRg2cnEmnLIvF3vtj+zeH10juyoVwekExpy56yiTJyB9ExebHYlcmeAw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:22:35.868881Z","signed_message":"canonical_sha256_bytes"},"source_id":"1802.08978","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:81d41b3bea0f270874da932eca0e43f6d691f58ae4850e4ce61158539feadcb1","sha256:753a5cf0bfc994114be6eb2f20de47153fd8ed72659a7e64b9b81669c72416ab"],"state_sha256":"c851eabb21c3ca44f3a0826bba89e061bd31aab020eddcb7f5000d7a29ccb695"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8Etx/tyeC8QKZdP16teW06m29cwx5knl4MT4iVGAUreHk4pHAavopVsd10kMX0NsQJ+pd8/rO3ERAjCG14InDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T15:34:41.344428Z","bundle_sha256":"b7c58b06e77b5f0b45b305843eb254d7b8bd5296b0242052d6ae9a8358c56a43"}}