{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:7JY2GAFZMCJ633VSWVI3GXRWFA","short_pith_number":"pith:7JY2GAFZ","canonical_record":{"source":{"id":"2101.08273","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2021-01-20T19:00:02Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"d26385360fa3fb2b4f76c79758edaee0d1c325c111882851b517013002185b5f","abstract_canon_sha256":"93800b7c665230c9746c49e00c1e71443986010412d60ff154d16a665975fb24"},"schema_version":"1.0"},"canonical_sha256":"fa71a300b96093edeeb2b551b35e3628115d3b023a6f59cbbf29d40236bbdc25","source":{"kind":"arxiv","id":"2101.08273","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2101.08273","created_at":"2026-07-05T02:55:38Z"},{"alias_kind":"arxiv_version","alias_value":"2101.08273v1","created_at":"2026-07-05T02:55:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2101.08273","created_at":"2026-07-05T02:55:38Z"},{"alias_kind":"pith_short_12","alias_value":"7JY2GAFZMCJ6","created_at":"2026-07-05T02:55:38Z"},{"alias_kind":"pith_short_16","alias_value":"7JY2GAFZMCJ633VS","created_at":"2026-07-05T02:55:38Z"},{"alias_kind":"pith_short_8","alias_value":"7JY2GAFZ","created_at":"2026-07-05T02:55:38Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:7JY2GAFZMCJ633VSWVI3GXRWFA","target":"record","payload":{"canonical_record":{"source":{"id":"2101.08273","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2021-01-20T19:00:02Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"d26385360fa3fb2b4f76c79758edaee0d1c325c111882851b517013002185b5f","abstract_canon_sha256":"93800b7c665230c9746c49e00c1e71443986010412d60ff154d16a665975fb24"},"schema_version":"1.0"},"canonical_sha256":"fa71a300b96093edeeb2b551b35e3628115d3b023a6f59cbbf29d40236bbdc25","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:55:38.621698Z","signature_b64":"lAl3vQJBtuf+0Dati++XDo3YT5E2h8EZT25hMpdBVt35efSRw8qaf6hrP4cofZFTri4BbtF7yU+j7MNNYeCWDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fa71a300b96093edeeb2b551b35e3628115d3b023a6f59cbbf29d40236bbdc25","last_reissued_at":"2026-07-05T02:55:38.621213Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:55:38.621213Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2101.08273","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":"2026-07-05T02:55:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"L/a5WlktaR8AiL0u1AWcmInX4cAm17nHa/xuQh3BoYoaG0IchEx/1kvioYvYHk+otGOz/posIbs4XMXk8OAkAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-19T15:41:16.808038Z"},"content_sha256":"bbc7b321bade632f209af94c533040a6f95951480e8d6b9e04d6067c6ef718c1","schema_version":"1.0","event_id":"sha256:bbc7b321bade632f209af94c533040a6f95951480e8d6b9e04d6067c6ef718c1"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:7JY2GAFZMCJ633VSWVI3GXRWFA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Flat bands with fragile topology through superlattice engineering on single-layer graphene","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.mes-hall","authors_text":"Anastasiia Skurativska, Fabian D Natterer, Mark H Fischer, Stepan S. Tsirkin, Titus Neupert","submitted_at":"2021-01-20T19:00:02Z","abstract_excerpt":"'Magic'-angle twisted bilayer graphene has received a lot of interest due to its flat bands with potentially non-trivial topology that lead to intricate correlated phases. A spectrum with flat bands, however, does not require a twist between multiple sheets of van der Waals materials, but rather can be realized with the application of an appropriate periodic potential. Here, we propose the imposition of a tailored periodic potential onto a single graphene layer through local perturbations that could be created via lithography or adatom manipulation, which also results in an energy spectrum fea"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2101.08273","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/2101.08273/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":"2026-07-05T02:55:38Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jxhFVxMBslx5HEQggfL7qSmKolakhS/MTUS1/Mf9BK0EysQ2MJYRHTISBfxLO9AW117998c7sUhetmagbtNXDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-19T15:41:16.808586Z"},"content_sha256":"5daeae5ecc2a220fa18465cc0718d319eadfa72ad9b3a13f39f5695f2ed93022","schema_version":"1.0","event_id":"sha256:5daeae5ecc2a220fa18465cc0718d319eadfa72ad9b3a13f39f5695f2ed93022"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7JY2GAFZMCJ633VSWVI3GXRWFA/bundle.json","state_url":"https://pith.science/pith/7JY2GAFZMCJ633VSWVI3GXRWFA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7JY2GAFZMCJ633VSWVI3GXRWFA/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":"2026-08-19T15:41:16Z","links":{"resolver":"https://pith.science/pith/7JY2GAFZMCJ633VSWVI3GXRWFA","bundle":"https://pith.science/pith/7JY2GAFZMCJ633VSWVI3GXRWFA/bundle.json","state":"https://pith.science/pith/7JY2GAFZMCJ633VSWVI3GXRWFA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7JY2GAFZMCJ633VSWVI3GXRWFA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:7JY2GAFZMCJ633VSWVI3GXRWFA","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":"93800b7c665230c9746c49e00c1e71443986010412d60ff154d16a665975fb24","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2021-01-20T19:00:02Z","title_canon_sha256":"d26385360fa3fb2b4f76c79758edaee0d1c325c111882851b517013002185b5f"},"schema_version":"1.0","source":{"id":"2101.08273","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2101.08273","created_at":"2026-07-05T02:55:38Z"},{"alias_kind":"arxiv_version","alias_value":"2101.08273v1","created_at":"2026-07-05T02:55:38Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2101.08273","created_at":"2026-07-05T02:55:38Z"},{"alias_kind":"pith_short_12","alias_value":"7JY2GAFZMCJ6","created_at":"2026-07-05T02:55:38Z"},{"alias_kind":"pith_short_16","alias_value":"7JY2GAFZMCJ633VS","created_at":"2026-07-05T02:55:38Z"},{"alias_kind":"pith_short_8","alias_value":"7JY2GAFZ","created_at":"2026-07-05T02:55:38Z"}],"graph_snapshots":[{"event_id":"sha256:5daeae5ecc2a220fa18465cc0718d319eadfa72ad9b3a13f39f5695f2ed93022","target":"graph","created_at":"2026-07-05T02:55:38Z","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/2101.08273/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"'Magic'-angle twisted bilayer graphene has received a lot of interest due to its flat bands with potentially non-trivial topology that lead to intricate correlated phases. A spectrum with flat bands, however, does not require a twist between multiple sheets of van der Waals materials, but rather can be realized with the application of an appropriate periodic potential. Here, we propose the imposition of a tailored periodic potential onto a single graphene layer through local perturbations that could be created via lithography or adatom manipulation, which also results in an energy spectrum fea","authors_text":"Anastasiia Skurativska, Fabian D Natterer, Mark H Fischer, Stepan S. Tsirkin, Titus Neupert","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2021-01-20T19:00:02Z","title":"Flat bands with fragile topology through superlattice engineering on single-layer graphene"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2101.08273","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:bbc7b321bade632f209af94c533040a6f95951480e8d6b9e04d6067c6ef718c1","target":"record","created_at":"2026-07-05T02:55:38Z","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":"93800b7c665230c9746c49e00c1e71443986010412d60ff154d16a665975fb24","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2021-01-20T19:00:02Z","title_canon_sha256":"d26385360fa3fb2b4f76c79758edaee0d1c325c111882851b517013002185b5f"},"schema_version":"1.0","source":{"id":"2101.08273","kind":"arxiv","version":1}},"canonical_sha256":"fa71a300b96093edeeb2b551b35e3628115d3b023a6f59cbbf29d40236bbdc25","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fa71a300b96093edeeb2b551b35e3628115d3b023a6f59cbbf29d40236bbdc25","first_computed_at":"2026-07-05T02:55:38.621213Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:55:38.621213Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lAl3vQJBtuf+0Dati++XDo3YT5E2h8EZT25hMpdBVt35efSRw8qaf6hrP4cofZFTri4BbtF7yU+j7MNNYeCWDg==","signature_status":"signed_v1","signed_at":"2026-07-05T02:55:38.621698Z","signed_message":"canonical_sha256_bytes"},"source_id":"2101.08273","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bbc7b321bade632f209af94c533040a6f95951480e8d6b9e04d6067c6ef718c1","sha256:5daeae5ecc2a220fa18465cc0718d319eadfa72ad9b3a13f39f5695f2ed93022"],"state_sha256":"50868f49e195aaa590c9c44563538595142e6803f047f3778e8f100264cca27f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AAPAOAkMTIGRoXF6oDY9evdfrmeuUS89a/DX0oomkToRf48noCW7vWauRfx4tIexFA5YSjgzogWXxqD4HxVrBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-19T15:41:16.811680Z","bundle_sha256":"1c3c9d041d8c8a39f14097b212b333725bb33b2dda753ab8f2590b12dd0f85d2"}}