{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:YLGMSZBJTAIVM6Q3I2MMS3PNQ4","short_pith_number":"pith:YLGMSZBJ","canonical_record":{"source":{"id":"1205.4258","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-05-18T20:27:16Z","cross_cats_sorted":[],"title_canon_sha256":"5dd88059413c21ac514f8f4e08692ee9cb5ba04462cc3257da3307d0c538af11","abstract_canon_sha256":"3a44e72331e5af8b8fc9126e36097554b14fef6d93eebb753ffdc6600ef1a9ed"},"schema_version":"1.0"},"canonical_sha256":"c2ccc964299811567a1b4698c96ded871e2adadf6ed0b555fd761511b186ba6c","source":{"kind":"arxiv","id":"1205.4258","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1205.4258","created_at":"2026-05-18T03:02:21Z"},{"alias_kind":"arxiv_version","alias_value":"1205.4258v1","created_at":"2026-05-18T03:02:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1205.4258","created_at":"2026-05-18T03:02:21Z"},{"alias_kind":"pith_short_12","alias_value":"YLGMSZBJTAIV","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_16","alias_value":"YLGMSZBJTAIVM6Q3","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_8","alias_value":"YLGMSZBJ","created_at":"2026-05-18T12:27:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:YLGMSZBJTAIVM6Q3I2MMS3PNQ4","target":"record","payload":{"canonical_record":{"source":{"id":"1205.4258","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-05-18T20:27:16Z","cross_cats_sorted":[],"title_canon_sha256":"5dd88059413c21ac514f8f4e08692ee9cb5ba04462cc3257da3307d0c538af11","abstract_canon_sha256":"3a44e72331e5af8b8fc9126e36097554b14fef6d93eebb753ffdc6600ef1a9ed"},"schema_version":"1.0"},"canonical_sha256":"c2ccc964299811567a1b4698c96ded871e2adadf6ed0b555fd761511b186ba6c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:02:21.368258Z","signature_b64":"S7RcQqjsprsRvdVBSQDpePJyRiJ2QzdnGuZSdG4aMHOdyt5b3pGREhK0VDcICfTyP2SRD1wWuCqCaCU3ZF3YAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c2ccc964299811567a1b4698c96ded871e2adadf6ed0b555fd761511b186ba6c","last_reissued_at":"2026-05-18T03:02:21.367607Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:02:21.367607Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1205.4258","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":"2026-05-18T03:02:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9hk+ZV0VtaZaBt3ZTjY0hVIawzaftFDJ1xjTj0Je+FCQ+LeAWfF5QYsKMoNW+nMZpo4jEPcYg5NwKzWOciPpAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T18:15:30.256162Z"},"content_sha256":"09fa12f3a6c081b4b649625191c257045413a7f13e1580eb0da26393eaaedf8f","schema_version":"1.0","event_id":"sha256:09fa12f3a6c081b4b649625191c257045413a7f13e1580eb0da26393eaaedf8f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:YLGMSZBJTAIVM6Q3I2MMS3PNQ4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Intrinsic Ultrathin Topological Insulators Grown via MBE Characterized by in-situ Angle Resolved Photoemission Spectroscopy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"F. T. Schmitt, I. M. Vishik, J. J. Lee, R. G. Moore, Y. Ma, Z. X. Shen","submitted_at":"2012-05-18T20:27:16Z","abstract_excerpt":"We demonstrate the capability of growing high quality ultrathin films of the topological insulators Bi2Se3 and Bi2Te3 using molecular beam epitaxy. Unlike previous growth techniques, which often pin the Fermi energy in the conduction band for ultrathin samples, our samples remain intrinsic bulk insulators. We characterize these films using in-situ angle resolved photoemission spectroscopy (ARPES), which is a direct probe of bandstructure, and ex-situ atomic force microscopy. We find that the conduction band lies above the Fermi energy, indicating bulk insulating behavior with only the surface "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1205.4258","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":"2026-05-18T03:02:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nTqKJ6GHAP04dg7kARw4ZfVKzQUpp0zX4TSAN8LP/1smus3Fju5HlSbRsfFf7rUBg5ImgKKWqmoYmcVyHGjcCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-21T18:15:30.256766Z"},"content_sha256":"e6d64f47630df89b48bdfbf848f58069bb44812686030e5372be7978cfdbfcdf","schema_version":"1.0","event_id":"sha256:e6d64f47630df89b48bdfbf848f58069bb44812686030e5372be7978cfdbfcdf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YLGMSZBJTAIVM6Q3I2MMS3PNQ4/bundle.json","state_url":"https://pith.science/pith/YLGMSZBJTAIVM6Q3I2MMS3PNQ4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YLGMSZBJTAIVM6Q3I2MMS3PNQ4/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":"2026-05-21T18:15:30Z","links":{"resolver":"https://pith.science/pith/YLGMSZBJTAIVM6Q3I2MMS3PNQ4","bundle":"https://pith.science/pith/YLGMSZBJTAIVM6Q3I2MMS3PNQ4/bundle.json","state":"https://pith.science/pith/YLGMSZBJTAIVM6Q3I2MMS3PNQ4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YLGMSZBJTAIVM6Q3I2MMS3PNQ4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:YLGMSZBJTAIVM6Q3I2MMS3PNQ4","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":"3a44e72331e5af8b8fc9126e36097554b14fef6d93eebb753ffdc6600ef1a9ed","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-05-18T20:27:16Z","title_canon_sha256":"5dd88059413c21ac514f8f4e08692ee9cb5ba04462cc3257da3307d0c538af11"},"schema_version":"1.0","source":{"id":"1205.4258","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1205.4258","created_at":"2026-05-18T03:02:21Z"},{"alias_kind":"arxiv_version","alias_value":"1205.4258v1","created_at":"2026-05-18T03:02:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1205.4258","created_at":"2026-05-18T03:02:21Z"},{"alias_kind":"pith_short_12","alias_value":"YLGMSZBJTAIV","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_16","alias_value":"YLGMSZBJTAIVM6Q3","created_at":"2026-05-18T12:27:27Z"},{"alias_kind":"pith_short_8","alias_value":"YLGMSZBJ","created_at":"2026-05-18T12:27:27Z"}],"graph_snapshots":[{"event_id":"sha256:e6d64f47630df89b48bdfbf848f58069bb44812686030e5372be7978cfdbfcdf","target":"graph","created_at":"2026-05-18T03:02:21Z","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 demonstrate the capability of growing high quality ultrathin films of the topological insulators Bi2Se3 and Bi2Te3 using molecular beam epitaxy. Unlike previous growth techniques, which often pin the Fermi energy in the conduction band for ultrathin samples, our samples remain intrinsic bulk insulators. We characterize these films using in-situ angle resolved photoemission spectroscopy (ARPES), which is a direct probe of bandstructure, and ex-situ atomic force microscopy. We find that the conduction band lies above the Fermi energy, indicating bulk insulating behavior with only the surface ","authors_text":"F. T. Schmitt, I. M. Vishik, J. J. Lee, R. G. Moore, Y. Ma, Z. X. Shen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-05-18T20:27:16Z","title":"Intrinsic Ultrathin Topological Insulators Grown via MBE Characterized by in-situ Angle Resolved Photoemission Spectroscopy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1205.4258","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":"sha256:09fa12f3a6c081b4b649625191c257045413a7f13e1580eb0da26393eaaedf8f","target":"record","created_at":"2026-05-18T03:02:21Z","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":"3a44e72331e5af8b8fc9126e36097554b14fef6d93eebb753ffdc6600ef1a9ed","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-05-18T20:27:16Z","title_canon_sha256":"5dd88059413c21ac514f8f4e08692ee9cb5ba04462cc3257da3307d0c538af11"},"schema_version":"1.0","source":{"id":"1205.4258","kind":"arxiv","version":1}},"canonical_sha256":"c2ccc964299811567a1b4698c96ded871e2adadf6ed0b555fd761511b186ba6c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c2ccc964299811567a1b4698c96ded871e2adadf6ed0b555fd761511b186ba6c","first_computed_at":"2026-05-18T03:02:21.367607Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:02:21.367607Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"S7RcQqjsprsRvdVBSQDpePJyRiJ2QzdnGuZSdG4aMHOdyt5b3pGREhK0VDcICfTyP2SRD1wWuCqCaCU3ZF3YAg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:02:21.368258Z","signed_message":"canonical_sha256_bytes"},"source_id":"1205.4258","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:09fa12f3a6c081b4b649625191c257045413a7f13e1580eb0da26393eaaedf8f","sha256:e6d64f47630df89b48bdfbf848f58069bb44812686030e5372be7978cfdbfcdf"],"state_sha256":"fb74befec3089402b059f6021479ea6f9a40c3a30e9e3cc4cdd98cac3678dd22"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uirmYtmJPrLD5SS0LLwWBgRDHlOqrOURf2s2H+krQb0UwCtSdxXiwuCWGR4r8psatuKgSIW76QMSbtIpZz17CQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-21T18:15:30.259862Z","bundle_sha256":"fb82f3639f593c0d22e75200d75a1c9fb6402ecfb72c7668c837ba7487614adf"}}