{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:SHWPDLYG6AEVQ3S7U3IFBIKIQW","short_pith_number":"pith:SHWPDLYG","canonical_record":{"source":{"id":"2606.09277","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-06-08T09:44:12Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"ed1aa3aab0373e9aaa7d1d129309f1ebca3289785c0cc1ae90aa39d6817eb7cb","abstract_canon_sha256":"6fc8bb3d61c3d5da253800ef149ef0e747466bd37e60be1176c59abfaf5a3019"},"schema_version":"1.0"},"canonical_sha256":"91ecf1af06f009586e5fa6d050a14885bd9eba3f892c11be49d553a983aebbf5","source":{"kind":"arxiv","id":"2606.09277","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.09277","created_at":"2026-06-09T02:08:11Z"},{"alias_kind":"arxiv_version","alias_value":"2606.09277v1","created_at":"2026-06-09T02:08:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.09277","created_at":"2026-06-09T02:08:11Z"},{"alias_kind":"pith_short_12","alias_value":"SHWPDLYG6AEV","created_at":"2026-06-09T02:08:11Z"},{"alias_kind":"pith_short_16","alias_value":"SHWPDLYG6AEVQ3S7","created_at":"2026-06-09T02:08:11Z"},{"alias_kind":"pith_short_8","alias_value":"SHWPDLYG","created_at":"2026-06-09T02:08:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:SHWPDLYG6AEVQ3S7U3IFBIKIQW","target":"record","payload":{"canonical_record":{"source":{"id":"2606.09277","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-06-08T09:44:12Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"ed1aa3aab0373e9aaa7d1d129309f1ebca3289785c0cc1ae90aa39d6817eb7cb","abstract_canon_sha256":"6fc8bb3d61c3d5da253800ef149ef0e747466bd37e60be1176c59abfaf5a3019"},"schema_version":"1.0"},"canonical_sha256":"91ecf1af06f009586e5fa6d050a14885bd9eba3f892c11be49d553a983aebbf5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-09T02:08:11.862912Z","signature_b64":"nxQpXpVm9hVbC6TBsfV/pOKDiSYHl6g9AOhfdPxK13x/0iyeubMiZp25hGje5HO6tPF9UuVkDFgmgfpMjYFfCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"91ecf1af06f009586e5fa6d050a14885bd9eba3f892c11be49d553a983aebbf5","last_reissued_at":"2026-06-09T02:08:11.862067Z","signature_status":"signed_v1","first_computed_at":"2026-06-09T02:08:11.862067Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2606.09277","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":"2026-06-09T02:08:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AwG+B1Qr6SDkMME1qA8Z4Z0+E82MQbSkoYd5/1azJPwY9mTMxQr2bdBOxsE+oZaegzcRObmz6gjyyApxC6+XCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-29T03:15:52.123793Z"},"content_sha256":"02996f349db0751b70def455540c7260390adc7ceac2157f7976426f728bc005","schema_version":"1.0","event_id":"sha256:02996f349db0751b70def455540c7260390adc7ceac2157f7976426f728bc005"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:SHWPDLYG6AEVQ3S7U3IFBIKIQW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Layer-parity-defined surface polarization in Nb$_3$Cl$_8$ for excitonic modulation at van der Waals interfaces","license":"http://creativecommons.org/publicdomain/zero/1.0/","headline":"","cross_cats":["cond-mat.mes-hall"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Hansheng Xu, Jianpeng Liu, Jianqi Huang, Kenji Watanabe, Takashi Taniguchi, Teng Yang, Xinyue Huang, Youguo Shi, Yuchen Gao, Yushen Zhou, Yu Ye, Zhijie Ma, Zuxin Chen","submitted_at":"2026-06-08T09:44:12Z","abstract_excerpt":"The intrinsic symmetry breaking in the breathing kagome lattice of layered Nb$_3$Cl$_8$ provides a unique mechanism for realizing electrically polar surfaces. In each monolayer, the trimerization of Nb atoms breaks inversion and mirror symmetries, generating an out-of-plane electric dipole. The AB-stacked $\\alpha$ phase arranges adjacent layer dipoles antiferroelectrically, leaving the uncompensated surface polarization strictly governed by layer parity. Here, using atomic force microscopy operated in Kelvin probe force microscopy mode, we directly visualize layer-dependent polarization states"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.09277","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2606.09277/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":"2026-06-09T02:08:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zIMbPdm7MkVXajF7Gbc/LGzVRLupXJvN7ysDH9Tze/HGFFTkASAU5Ymvh2o+lJ9JzYAyLrBCipkVLYNHyqnGDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-29T03:15:52.124164Z"},"content_sha256":"e83534fb23b7f5f8844e380616f454be42efaf9571232bd331680f6dcce31c59","schema_version":"1.0","event_id":"sha256:e83534fb23b7f5f8844e380616f454be42efaf9571232bd331680f6dcce31c59"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SHWPDLYG6AEVQ3S7U3IFBIKIQW/bundle.json","state_url":"https://pith.science/pith/SHWPDLYG6AEVQ3S7U3IFBIKIQW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SHWPDLYG6AEVQ3S7U3IFBIKIQW/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":"2026-06-29T03:15:52Z","links":{"resolver":"https://pith.science/pith/SHWPDLYG6AEVQ3S7U3IFBIKIQW","bundle":"https://pith.science/pith/SHWPDLYG6AEVQ3S7U3IFBIKIQW/bundle.json","state":"https://pith.science/pith/SHWPDLYG6AEVQ3S7U3IFBIKIQW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SHWPDLYG6AEVQ3S7U3IFBIKIQW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:SHWPDLYG6AEVQ3S7U3IFBIKIQW","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":"6fc8bb3d61c3d5da253800ef149ef0e747466bd37e60be1176c59abfaf5a3019","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-06-08T09:44:12Z","title_canon_sha256":"ed1aa3aab0373e9aaa7d1d129309f1ebca3289785c0cc1ae90aa39d6817eb7cb"},"schema_version":"1.0","source":{"id":"2606.09277","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2606.09277","created_at":"2026-06-09T02:08:11Z"},{"alias_kind":"arxiv_version","alias_value":"2606.09277v1","created_at":"2026-06-09T02:08:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2606.09277","created_at":"2026-06-09T02:08:11Z"},{"alias_kind":"pith_short_12","alias_value":"SHWPDLYG6AEV","created_at":"2026-06-09T02:08:11Z"},{"alias_kind":"pith_short_16","alias_value":"SHWPDLYG6AEVQ3S7","created_at":"2026-06-09T02:08:11Z"},{"alias_kind":"pith_short_8","alias_value":"SHWPDLYG","created_at":"2026-06-09T02:08:11Z"}],"graph_snapshots":[{"event_id":"sha256:e83534fb23b7f5f8844e380616f454be42efaf9571232bd331680f6dcce31c59","target":"graph","created_at":"2026-06-09T02:08:11Z","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/2606.09277/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The intrinsic symmetry breaking in the breathing kagome lattice of layered Nb$_3$Cl$_8$ provides a unique mechanism for realizing electrically polar surfaces. In each monolayer, the trimerization of Nb atoms breaks inversion and mirror symmetries, generating an out-of-plane electric dipole. The AB-stacked $\\alpha$ phase arranges adjacent layer dipoles antiferroelectrically, leaving the uncompensated surface polarization strictly governed by layer parity. Here, using atomic force microscopy operated in Kelvin probe force microscopy mode, we directly visualize layer-dependent polarization states","authors_text":"Hansheng Xu, Jianpeng Liu, Jianqi Huang, Kenji Watanabe, Takashi Taniguchi, Teng Yang, Xinyue Huang, Youguo Shi, Yuchen Gao, Yushen Zhou, Yu Ye, Zhijie Ma, Zuxin Chen","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-06-08T09:44:12Z","title":"Layer-parity-defined surface polarization in Nb$_3$Cl$_8$ for excitonic modulation at van der Waals interfaces"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2606.09277","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":"sha256:02996f349db0751b70def455540c7260390adc7ceac2157f7976426f728bc005","target":"record","created_at":"2026-06-09T02:08:11Z","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":"6fc8bb3d61c3d5da253800ef149ef0e747466bd37e60be1176c59abfaf5a3019","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-06-08T09:44:12Z","title_canon_sha256":"ed1aa3aab0373e9aaa7d1d129309f1ebca3289785c0cc1ae90aa39d6817eb7cb"},"schema_version":"1.0","source":{"id":"2606.09277","kind":"arxiv","version":1}},"canonical_sha256":"91ecf1af06f009586e5fa6d050a14885bd9eba3f892c11be49d553a983aebbf5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"91ecf1af06f009586e5fa6d050a14885bd9eba3f892c11be49d553a983aebbf5","first_computed_at":"2026-06-09T02:08:11.862067Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-09T02:08:11.862067Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nxQpXpVm9hVbC6TBsfV/pOKDiSYHl6g9AOhfdPxK13x/0iyeubMiZp25hGje5HO6tPF9UuVkDFgmgfpMjYFfCQ==","signature_status":"signed_v1","signed_at":"2026-06-09T02:08:11.862912Z","signed_message":"canonical_sha256_bytes"},"source_id":"2606.09277","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:02996f349db0751b70def455540c7260390adc7ceac2157f7976426f728bc005","sha256:e83534fb23b7f5f8844e380616f454be42efaf9571232bd331680f6dcce31c59"],"state_sha256":"43b25d8cee3c3d4ec5c96508c6565121533bf1f76e194bf29e338c2e17a7ce07"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rGe4ADd54QVTdlPHZjjQ8/GhHrW0y2aKPVzLvc7c0zkYOYoEkaDUtQ7akRWTwpka3LoTNXmtkHVOSDvYK9UMAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-29T03:15:52.126051Z","bundle_sha256":"24775182a4295504c355a3f75d437ee53c3630b92d59099d8e02b5e8af45c3b8"}}