{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:3OT2ORI65HVMDTX4P4MMKOG2KD","short_pith_number":"pith:3OT2ORI6","canonical_record":{"source":{"id":"2107.00698","kind":"arxiv","version":4},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2021-07-01T18:43:30Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"8c638dbee8b7143c31968abee3f66bd3f23c002b7a9cba60a92f70e6937996d6","abstract_canon_sha256":"e93dc20affbb34aa3162f651f4fe34e328aa11d64d7eaa702482654dc705a1bc"},"schema_version":"1.0"},"canonical_sha256":"dba7a7451ee9eac1cefc7f18c538da50fab33352fb34ca75ab59c81f7cec57ce","source":{"kind":"arxiv","id":"2107.00698","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2107.00698","created_at":"2026-07-05T03:00:18Z"},{"alias_kind":"arxiv_version","alias_value":"2107.00698v4","created_at":"2026-07-05T03:00:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.00698","created_at":"2026-07-05T03:00:18Z"},{"alias_kind":"pith_short_12","alias_value":"3OT2ORI65HVM","created_at":"2026-07-05T03:00:18Z"},{"alias_kind":"pith_short_16","alias_value":"3OT2ORI65HVMDTX4","created_at":"2026-07-05T03:00:18Z"},{"alias_kind":"pith_short_8","alias_value":"3OT2ORI6","created_at":"2026-07-05T03:00:18Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:3OT2ORI65HVMDTX4P4MMKOG2KD","target":"record","payload":{"canonical_record":{"source":{"id":"2107.00698","kind":"arxiv","version":4},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2021-07-01T18:43:30Z","cross_cats_sorted":["cond-mat.mes-hall"],"title_canon_sha256":"8c638dbee8b7143c31968abee3f66bd3f23c002b7a9cba60a92f70e6937996d6","abstract_canon_sha256":"e93dc20affbb34aa3162f651f4fe34e328aa11d64d7eaa702482654dc705a1bc"},"schema_version":"1.0"},"canonical_sha256":"dba7a7451ee9eac1cefc7f18c538da50fab33352fb34ca75ab59c81f7cec57ce","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T03:00:18.633423Z","signature_b64":"fPkEY5+1avhO/luyDzTQszHUIipjjSmumOdb+yLfpzBKQKRK+jwWcMSE5Dyu4FZXsZweKqzIuoAhz1Vrwyg+Bw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dba7a7451ee9eac1cefc7f18c538da50fab33352fb34ca75ab59c81f7cec57ce","last_reissued_at":"2026-07-05T03:00:18.632967Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T03:00:18.632967Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2107.00698","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T03:00:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+JKF12aHScXRanXzgAuCY6PFC8TIDOxZTRQINK8aPayq3t68r4wHTRnp4bhi/ysYCN5nGTTToTLwhQovLD45Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-09T02:06:03.998193Z"},"content_sha256":"832bbe1347f685cefc02ce6e6eaf067ab81c3d7ff051b96d2a6ff6efd5587c26","schema_version":"1.0","event_id":"sha256:832bbe1347f685cefc02ce6e6eaf067ab81c3d7ff051b96d2a6ff6efd5587c26"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:3OT2ORI65HVMDTX4P4MMKOG2KD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Evidence for Higher order topology in Bi and Bi$_{0.92}$Sb$_{0.08}$","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cond-mat.mes-hall"],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Leena Aggarwal, Penghao Zhu, Taylor L. Hughes, Vidya Madhavan","submitted_at":"2021-07-01T18:43:30Z","abstract_excerpt":"Higher order topological insulators (HOTIs) are a new class of topological materials which host protected states at the corners or hinges of a crystal. HOTIs provide an intriguing alternative platform for helical and chiral edge states and Majorana modes, but there are very few known materials in this class. Recent studies have proposed Bi as a potential HOTI, however, its topological classification is not yet well accepted. In this work, we show that the (110) facets of Bi and BiSb alloys can be used to unequivocally establish the topology of these systems. Bi and Bi$_{0.92}$Sb$_{0.08}$ (110)"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.00698","kind":"arxiv","version":4},"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/2107.00698/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":"2026-07-05T03:00:18Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SkBd6vEzBU6tEJA5/K8dPfQaxT9jYngDTwSCaD4fQ4vb8bluJ/sFNJgGfjicO6uEilQzXrOq7Vl7ki80Dom7Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-09T02:06:03.998576Z"},"content_sha256":"241b9cf91f08cb6439f577b6635068c5ee9f29ec8727c9b6628c2b4d618c7091","schema_version":"1.0","event_id":"sha256:241b9cf91f08cb6439f577b6635068c5ee9f29ec8727c9b6628c2b4d618c7091"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/3OT2ORI65HVMDTX4P4MMKOG2KD/bundle.json","state_url":"https://pith.science/pith/3OT2ORI65HVMDTX4P4MMKOG2KD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/3OT2ORI65HVMDTX4P4MMKOG2KD/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":"2026-07-09T02:06:03Z","links":{"resolver":"https://pith.science/pith/3OT2ORI65HVMDTX4P4MMKOG2KD","bundle":"https://pith.science/pith/3OT2ORI65HVMDTX4P4MMKOG2KD/bundle.json","state":"https://pith.science/pith/3OT2ORI65HVMDTX4P4MMKOG2KD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/3OT2ORI65HVMDTX4P4MMKOG2KD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:3OT2ORI65HVMDTX4P4MMKOG2KD","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":"e93dc20affbb34aa3162f651f4fe34e328aa11d64d7eaa702482654dc705a1bc","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2021-07-01T18:43:30Z","title_canon_sha256":"8c638dbee8b7143c31968abee3f66bd3f23c002b7a9cba60a92f70e6937996d6"},"schema_version":"1.0","source":{"id":"2107.00698","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2107.00698","created_at":"2026-07-05T03:00:18Z"},{"alias_kind":"arxiv_version","alias_value":"2107.00698v4","created_at":"2026-07-05T03:00:18Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2107.00698","created_at":"2026-07-05T03:00:18Z"},{"alias_kind":"pith_short_12","alias_value":"3OT2ORI65HVM","created_at":"2026-07-05T03:00:18Z"},{"alias_kind":"pith_short_16","alias_value":"3OT2ORI65HVMDTX4","created_at":"2026-07-05T03:00:18Z"},{"alias_kind":"pith_short_8","alias_value":"3OT2ORI6","created_at":"2026-07-05T03:00:18Z"}],"graph_snapshots":[{"event_id":"sha256:241b9cf91f08cb6439f577b6635068c5ee9f29ec8727c9b6628c2b4d618c7091","target":"graph","created_at":"2026-07-05T03:00:18Z","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/2107.00698/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Higher order topological insulators (HOTIs) are a new class of topological materials which host protected states at the corners or hinges of a crystal. HOTIs provide an intriguing alternative platform for helical and chiral edge states and Majorana modes, but there are very few known materials in this class. Recent studies have proposed Bi as a potential HOTI, however, its topological classification is not yet well accepted. In this work, we show that the (110) facets of Bi and BiSb alloys can be used to unequivocally establish the topology of these systems. Bi and Bi$_{0.92}$Sb$_{0.08}$ (110)","authors_text":"Leena Aggarwal, Penghao Zhu, Taylor L. Hughes, Vidya Madhavan","cross_cats":["cond-mat.mes-hall"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2021-07-01T18:43:30Z","title":"Evidence for Higher order topology in Bi and Bi$_{0.92}$Sb$_{0.08}$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.00698","kind":"arxiv","version":4},"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":"sha256:832bbe1347f685cefc02ce6e6eaf067ab81c3d7ff051b96d2a6ff6efd5587c26","target":"record","created_at":"2026-07-05T03:00:18Z","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":"e93dc20affbb34aa3162f651f4fe34e328aa11d64d7eaa702482654dc705a1bc","cross_cats_sorted":["cond-mat.mes-hall"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2021-07-01T18:43:30Z","title_canon_sha256":"8c638dbee8b7143c31968abee3f66bd3f23c002b7a9cba60a92f70e6937996d6"},"schema_version":"1.0","source":{"id":"2107.00698","kind":"arxiv","version":4}},"canonical_sha256":"dba7a7451ee9eac1cefc7f18c538da50fab33352fb34ca75ab59c81f7cec57ce","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"dba7a7451ee9eac1cefc7f18c538da50fab33352fb34ca75ab59c81f7cec57ce","first_computed_at":"2026-07-05T03:00:18.632967Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:00:18.632967Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fPkEY5+1avhO/luyDzTQszHUIipjjSmumOdb+yLfpzBKQKRK+jwWcMSE5Dyu4FZXsZweKqzIuoAhz1Vrwyg+Bw==","signature_status":"signed_v1","signed_at":"2026-07-05T03:00:18.633423Z","signed_message":"canonical_sha256_bytes"},"source_id":"2107.00698","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:832bbe1347f685cefc02ce6e6eaf067ab81c3d7ff051b96d2a6ff6efd5587c26","sha256:241b9cf91f08cb6439f577b6635068c5ee9f29ec8727c9b6628c2b4d618c7091"],"state_sha256":"8998b4c8963930153b4dee30bd3bf03cfae035f2a52ec81403dfae57ffa2bb1e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Wv7CUbCKFvhqDRbyT25jjSfhy/dDt/huOiWtbIOr0yjUwYFKaoxZmXnkUvdlwboOgcHWFHXjqrPwTRQRJ7+zBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-09T02:06:04.000470Z","bundle_sha256":"59d0559e5ee9f1291e410b8bf00587f1396bc87c429ed0d56ca4a0ab3ceb77e9"}}