{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:2JQY6DRTGU6MBMJ5J2Y5HHBWOV","short_pith_number":"pith:2JQY6DRT","canonical_record":{"source":{"id":"2009.06175","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2020-09-14T03:34:09Z","cross_cats_sorted":[],"title_canon_sha256":"2eecf34ce46e28b65cbf149722b1c368ac557a9baee974db825540b43aeb112f","abstract_canon_sha256":"d6428d2d31640f739af72c2aef8a1b6d92cdd881ab11fd87f9a898beff46bc48"},"schema_version":"1.0"},"canonical_sha256":"d2618f0e33353cc0b13d4eb1d39c36755c117d366d7615911e8c3616316b76db","source":{"kind":"arxiv","id":"2009.06175","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2009.06175","created_at":"2026-07-05T05:15:34Z"},{"alias_kind":"arxiv_version","alias_value":"2009.06175v2","created_at":"2026-07-05T05:15:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.06175","created_at":"2026-07-05T05:15:34Z"},{"alias_kind":"pith_short_12","alias_value":"2JQY6DRTGU6M","created_at":"2026-07-05T05:15:34Z"},{"alias_kind":"pith_short_16","alias_value":"2JQY6DRTGU6MBMJ5","created_at":"2026-07-05T05:15:34Z"},{"alias_kind":"pith_short_8","alias_value":"2JQY6DRT","created_at":"2026-07-05T05:15:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:2JQY6DRTGU6MBMJ5J2Y5HHBWOV","target":"record","payload":{"canonical_record":{"source":{"id":"2009.06175","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2020-09-14T03:34:09Z","cross_cats_sorted":[],"title_canon_sha256":"2eecf34ce46e28b65cbf149722b1c368ac557a9baee974db825540b43aeb112f","abstract_canon_sha256":"d6428d2d31640f739af72c2aef8a1b6d92cdd881ab11fd87f9a898beff46bc48"},"schema_version":"1.0"},"canonical_sha256":"d2618f0e33353cc0b13d4eb1d39c36755c117d366d7615911e8c3616316b76db","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:15:34.007559Z","signature_b64":"ORMzoCNBVGEgHa8ltajRxRGsrkzrnJu3Ak1qJOzL1xv4K3H5ORHs3+eTn+gbdLxDTwviq1brtaDa0mBSGMkVAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d2618f0e33353cc0b13d4eb1d39c36755c117d366d7615911e8c3616316b76db","last_reissued_at":"2026-07-05T05:15:34.007013Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:15:34.007013Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2009.06175","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T05:15:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"T745FBpWj5VvYEEtBjBtHBVMCnTi/7UmxJ1pyViCj0HfeuPRyWoi6SXUeGuzGckdICGL3WElSd7noAMQRuF5Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-09T06:00:02.946533Z"},"content_sha256":"4a34a94f8bed0087c8e469ea3d2dbd9e922f962b2205f8a30eca5b3989f7aacc","schema_version":"1.0","event_id":"sha256:4a34a94f8bed0087c8e469ea3d2dbd9e922f962b2205f8a30eca5b3989f7aacc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:2JQY6DRTGU6MBMJ5J2Y5HHBWOV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Crossover from 2D ferromagnetic insulator to wide bandgap quantum anomalous Hall insulator in ultra-thin MnBi2Te4","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Antonija Grubi\\v{s}i\\'c-\\v{C}abo, Anton Tadich, Chi Xuan Trang, Golrokh Akhgar, Iolanda Di Bernardo, Jinwoong Hwang, Mark T. Edmonds, Michael S. Fuhrer, Nikhil Medhekar, Qile Li, Sung- Kwan Mo, Yuefeng Yin","submitted_at":"2020-09-14T03:34:09Z","abstract_excerpt":"Intrinsic magnetic topological insulators offer low disorder and large magnetic bandgaps for robust magnetic topological phases operating at higher temperatures. By controlling the layer thickness, emergent phenomena such as the Quantum Anomalous Hall (QAH) effect and axion insulator phases have been realised. These observations occur at temperatures significantly lower than the Neel temperature of bulk MnBi2Te4, and measurement of the magnetic energy gap at the Dirac point in ultra-thin MnBi2Te4 has yet to be achieved. Critical to achieving the promise of this system is a direct measurement o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.06175","kind":"arxiv","version":2},"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/2009.06175/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":"2026-07-05T05:15:34Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Eq/xMdu63mrZqlNt13aR37huxKkqyP4bsFYb+ice+aeil+gygrstwO6iuSxYMY3ZAxIhnoPA7079Ys50JVOICA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-09T06:00:02.946922Z"},"content_sha256":"703f232a67d67abf62d8659f2ea609c48fb32f3f2234a94ef75bbb3b417e25af","schema_version":"1.0","event_id":"sha256:703f232a67d67abf62d8659f2ea609c48fb32f3f2234a94ef75bbb3b417e25af"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2JQY6DRTGU6MBMJ5J2Y5HHBWOV/bundle.json","state_url":"https://pith.science/pith/2JQY6DRTGU6MBMJ5J2Y5HHBWOV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2JQY6DRTGU6MBMJ5J2Y5HHBWOV/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":"2026-07-09T06:00:02Z","links":{"resolver":"https://pith.science/pith/2JQY6DRTGU6MBMJ5J2Y5HHBWOV","bundle":"https://pith.science/pith/2JQY6DRTGU6MBMJ5J2Y5HHBWOV/bundle.json","state":"https://pith.science/pith/2JQY6DRTGU6MBMJ5J2Y5HHBWOV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2JQY6DRTGU6MBMJ5J2Y5HHBWOV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:2JQY6DRTGU6MBMJ5J2Y5HHBWOV","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":"d6428d2d31640f739af72c2aef8a1b6d92cdd881ab11fd87f9a898beff46bc48","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2020-09-14T03:34:09Z","title_canon_sha256":"2eecf34ce46e28b65cbf149722b1c368ac557a9baee974db825540b43aeb112f"},"schema_version":"1.0","source":{"id":"2009.06175","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2009.06175","created_at":"2026-07-05T05:15:34Z"},{"alias_kind":"arxiv_version","alias_value":"2009.06175v2","created_at":"2026-07-05T05:15:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2009.06175","created_at":"2026-07-05T05:15:34Z"},{"alias_kind":"pith_short_12","alias_value":"2JQY6DRTGU6M","created_at":"2026-07-05T05:15:34Z"},{"alias_kind":"pith_short_16","alias_value":"2JQY6DRTGU6MBMJ5","created_at":"2026-07-05T05:15:34Z"},{"alias_kind":"pith_short_8","alias_value":"2JQY6DRT","created_at":"2026-07-05T05:15:34Z"}],"graph_snapshots":[{"event_id":"sha256:703f232a67d67abf62d8659f2ea609c48fb32f3f2234a94ef75bbb3b417e25af","target":"graph","created_at":"2026-07-05T05:15:34Z","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/2009.06175/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Intrinsic magnetic topological insulators offer low disorder and large magnetic bandgaps for robust magnetic topological phases operating at higher temperatures. By controlling the layer thickness, emergent phenomena such as the Quantum Anomalous Hall (QAH) effect and axion insulator phases have been realised. These observations occur at temperatures significantly lower than the Neel temperature of bulk MnBi2Te4, and measurement of the magnetic energy gap at the Dirac point in ultra-thin MnBi2Te4 has yet to be achieved. Critical to achieving the promise of this system is a direct measurement o","authors_text":"Antonija Grubi\\v{s}i\\'c-\\v{C}abo, Anton Tadich, Chi Xuan Trang, Golrokh Akhgar, Iolanda Di Bernardo, Jinwoong Hwang, Mark T. Edmonds, Michael S. Fuhrer, Nikhil Medhekar, Qile Li, Sung- Kwan Mo, Yuefeng Yin","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2020-09-14T03:34:09Z","title":"Crossover from 2D ferromagnetic insulator to wide bandgap quantum anomalous Hall insulator in ultra-thin MnBi2Te4"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2009.06175","kind":"arxiv","version":2},"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":"sha256:4a34a94f8bed0087c8e469ea3d2dbd9e922f962b2205f8a30eca5b3989f7aacc","target":"record","created_at":"2026-07-05T05:15:34Z","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":"d6428d2d31640f739af72c2aef8a1b6d92cdd881ab11fd87f9a898beff46bc48","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2020-09-14T03:34:09Z","title_canon_sha256":"2eecf34ce46e28b65cbf149722b1c368ac557a9baee974db825540b43aeb112f"},"schema_version":"1.0","source":{"id":"2009.06175","kind":"arxiv","version":2}},"canonical_sha256":"d2618f0e33353cc0b13d4eb1d39c36755c117d366d7615911e8c3616316b76db","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d2618f0e33353cc0b13d4eb1d39c36755c117d366d7615911e8c3616316b76db","first_computed_at":"2026-07-05T05:15:34.007013Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:15:34.007013Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ORMzoCNBVGEgHa8ltajRxRGsrkzrnJu3Ak1qJOzL1xv4K3H5ORHs3+eTn+gbdLxDTwviq1brtaDa0mBSGMkVAw==","signature_status":"signed_v1","signed_at":"2026-07-05T05:15:34.007559Z","signed_message":"canonical_sha256_bytes"},"source_id":"2009.06175","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:4a34a94f8bed0087c8e469ea3d2dbd9e922f962b2205f8a30eca5b3989f7aacc","sha256:703f232a67d67abf62d8659f2ea609c48fb32f3f2234a94ef75bbb3b417e25af"],"state_sha256":"8e4e42639eb26bc9f867504e81091b508f8f31dadea9c55b3a34b02e760b1c07"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TS5fdrboZvrxXKqONtAE3m4kAXNgaJ9UlthF5fWP4w9iSWOpv1xnloEGJOffCbQZpEvvgnXU2x1UCkcjV96lAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-09T06:00:02.949198Z","bundle_sha256":"4dff00afa873bf9b4036c6752a1188f8b0bf16218c712ad206947bb1d5037a9b"}}