{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:5KIJ6KKVH6TQ2HHIPZHDZVXDWR","short_pith_number":"pith:5KIJ6KKV","canonical_record":{"source":{"id":"1511.02417","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-11-08T00:46:23Z","cross_cats_sorted":[],"title_canon_sha256":"adab1a936267bab1f6212eee20f8469b13de766dbebfc64e9bf2df8218c53551","abstract_canon_sha256":"a94ed5463e2677391bbf3587e24c8f6ca099754b00a3e55174d9576ec8628a61"},"schema_version":"1.0"},"canonical_sha256":"ea909f29553fa70d1ce87e4e3cd6e3b46da2a0348d0765a9c0fdcd8d449d56cd","source":{"kind":"arxiv","id":"1511.02417","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1511.02417","created_at":"2026-05-18T00:33:53Z"},{"alias_kind":"arxiv_version","alias_value":"1511.02417v1","created_at":"2026-05-18T00:33:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1511.02417","created_at":"2026-05-18T00:33:53Z"},{"alias_kind":"pith_short_12","alias_value":"5KIJ6KKVH6TQ","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_16","alias_value":"5KIJ6KKVH6TQ2HHI","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_8","alias_value":"5KIJ6KKV","created_at":"2026-05-18T12:29:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:5KIJ6KKVH6TQ2HHIPZHDZVXDWR","target":"record","payload":{"canonical_record":{"source":{"id":"1511.02417","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-11-08T00:46:23Z","cross_cats_sorted":[],"title_canon_sha256":"adab1a936267bab1f6212eee20f8469b13de766dbebfc64e9bf2df8218c53551","abstract_canon_sha256":"a94ed5463e2677391bbf3587e24c8f6ca099754b00a3e55174d9576ec8628a61"},"schema_version":"1.0"},"canonical_sha256":"ea909f29553fa70d1ce87e4e3cd6e3b46da2a0348d0765a9c0fdcd8d449d56cd","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:33:53.473140Z","signature_b64":"PGRPj9qOuupyiUB0zopg85yugBw7puFHSEEMn4n0KnzIogfpa4D+zrTXfN1RS4ybezkaHQA9Uklc8xPsqcfLAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ea909f29553fa70d1ce87e4e3cd6e3b46da2a0348d0765a9c0fdcd8d449d56cd","last_reissued_at":"2026-05-18T00:33:53.472525Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:33:53.472525Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1511.02417","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":"2026-05-18T00:33:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8JUHLZz+OritA4kcVQacGvG+CtGvQ/rhn9fFNRciodoC9HiNRUS1MjcXQuJ20INIZMzR/odqBJ94jcgOeWOgCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T07:30:44.363811Z"},"content_sha256":"9b44cc38679a4c2f41c9f5a230ed1f604b04e4816701fa01fc51f1053b804673","schema_version":"1.0","event_id":"sha256:9b44cc38679a4c2f41c9f5a230ed1f604b04e4816701fa01fc51f1053b804673"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:5KIJ6KKVH6TQ2HHIPZHDZVXDWR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Engineering electronic structure of a 2D topological insulator Bi(111) bilayer on Sb nanofilms by quantum confinement effect","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mes-hall","authors_text":"Caizhi Xu, Feng Liu, Guang Bian, M. Zahid Hasan, Su-Yang Xu, T.-C. Chiang, T. Miller, Xiaoxiong Wang, Z. F. Wang","submitted_at":"2015-11-08T00:46:23Z","abstract_excerpt":"We report on fabrication of a two-dimensional topological insulator-Bi(111) bilayer on Sb nanofilms via a sequential molecular beam epitaxy (MBE) growth technique. Our angle-resolved photoemission measurements demonstrate the evolution of the electronic band structure of the heterostructure as a function of the film thickness and reveal the existence of a two-dimensional spinful massless electron gas within the top Bi bilayer. Interestingly, Our first-principles calculation extrapolating the observed band structure shows that, by tuning down the thickness of the supporting Sb films into the qu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.02417","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":"2026-05-18T00:33:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"q4RuTGVcfOR9P9YUXL6a6aQjSZbFb5Gon9Mbh/3MnulwvAXwqUfsxrR/5t2aZf+2zTgI5qxLnfoRnxr1Lx50BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T07:30:44.364481Z"},"content_sha256":"1f8c850541ca44445f34e5fea7b79d51f9f9105f0ccde8e9bc9465013449433c","schema_version":"1.0","event_id":"sha256:1f8c850541ca44445f34e5fea7b79d51f9f9105f0ccde8e9bc9465013449433c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5KIJ6KKVH6TQ2HHIPZHDZVXDWR/bundle.json","state_url":"https://pith.science/pith/5KIJ6KKVH6TQ2HHIPZHDZVXDWR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5KIJ6KKVH6TQ2HHIPZHDZVXDWR/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":"2026-05-27T07:30:44Z","links":{"resolver":"https://pith.science/pith/5KIJ6KKVH6TQ2HHIPZHDZVXDWR","bundle":"https://pith.science/pith/5KIJ6KKVH6TQ2HHIPZHDZVXDWR/bundle.json","state":"https://pith.science/pith/5KIJ6KKVH6TQ2HHIPZHDZVXDWR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5KIJ6KKVH6TQ2HHIPZHDZVXDWR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:5KIJ6KKVH6TQ2HHIPZHDZVXDWR","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":"a94ed5463e2677391bbf3587e24c8f6ca099754b00a3e55174d9576ec8628a61","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-11-08T00:46:23Z","title_canon_sha256":"adab1a936267bab1f6212eee20f8469b13de766dbebfc64e9bf2df8218c53551"},"schema_version":"1.0","source":{"id":"1511.02417","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1511.02417","created_at":"2026-05-18T00:33:53Z"},{"alias_kind":"arxiv_version","alias_value":"1511.02417v1","created_at":"2026-05-18T00:33:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1511.02417","created_at":"2026-05-18T00:33:53Z"},{"alias_kind":"pith_short_12","alias_value":"5KIJ6KKVH6TQ","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_16","alias_value":"5KIJ6KKVH6TQ2HHI","created_at":"2026-05-18T12:29:05Z"},{"alias_kind":"pith_short_8","alias_value":"5KIJ6KKV","created_at":"2026-05-18T12:29:05Z"}],"graph_snapshots":[{"event_id":"sha256:1f8c850541ca44445f34e5fea7b79d51f9f9105f0ccde8e9bc9465013449433c","target":"graph","created_at":"2026-05-18T00:33:53Z","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 report on fabrication of a two-dimensional topological insulator-Bi(111) bilayer on Sb nanofilms via a sequential molecular beam epitaxy (MBE) growth technique. Our angle-resolved photoemission measurements demonstrate the evolution of the electronic band structure of the heterostructure as a function of the film thickness and reveal the existence of a two-dimensional spinful massless electron gas within the top Bi bilayer. Interestingly, Our first-principles calculation extrapolating the observed band structure shows that, by tuning down the thickness of the supporting Sb films into the qu","authors_text":"Caizhi Xu, Feng Liu, Guang Bian, M. Zahid Hasan, Su-Yang Xu, T.-C. Chiang, T. Miller, Xiaoxiong Wang, Z. F. Wang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-11-08T00:46:23Z","title":"Engineering electronic structure of a 2D topological insulator Bi(111) bilayer on Sb nanofilms by quantum confinement effect"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1511.02417","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":"sha256:9b44cc38679a4c2f41c9f5a230ed1f604b04e4816701fa01fc51f1053b804673","target":"record","created_at":"2026-05-18T00:33:53Z","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":"a94ed5463e2677391bbf3587e24c8f6ca099754b00a3e55174d9576ec8628a61","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2015-11-08T00:46:23Z","title_canon_sha256":"adab1a936267bab1f6212eee20f8469b13de766dbebfc64e9bf2df8218c53551"},"schema_version":"1.0","source":{"id":"1511.02417","kind":"arxiv","version":1}},"canonical_sha256":"ea909f29553fa70d1ce87e4e3cd6e3b46da2a0348d0765a9c0fdcd8d449d56cd","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ea909f29553fa70d1ce87e4e3cd6e3b46da2a0348d0765a9c0fdcd8d449d56cd","first_computed_at":"2026-05-18T00:33:53.472525Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:33:53.472525Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"PGRPj9qOuupyiUB0zopg85yugBw7puFHSEEMn4n0KnzIogfpa4D+zrTXfN1RS4ybezkaHQA9Uklc8xPsqcfLAw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:33:53.473140Z","signed_message":"canonical_sha256_bytes"},"source_id":"1511.02417","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9b44cc38679a4c2f41c9f5a230ed1f604b04e4816701fa01fc51f1053b804673","sha256:1f8c850541ca44445f34e5fea7b79d51f9f9105f0ccde8e9bc9465013449433c"],"state_sha256":"70979cb8de28fe940590c29b2cc41c4ac172db1d5bbaaa7d69454644b8037a54"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XxFShQbPEbMe09bAsOnM7z64AwQoxVEh/zqjLR5Ew3Z97WceEUZzSmzDjj6VB3GeDPhqTdfkEubcHYMlEvU5BQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T07:30:44.368125Z","bundle_sha256":"d5cb7c4148d27f9285465d208e2ddc933d4795fb1d5f240ee1f5df6bd0b8a4a9"}}