{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:TYSIFPTHDXATTSPGDKDQ55KP4D","short_pith_number":"pith:TYSIFPTH","canonical_record":{"source":{"id":"2502.05527","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2025-02-08T11:17:44Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"9991f6f1ad11bfca9155c05a2e3066a6a6200b7eb9759ffba053fa8c3a1f1c88","abstract_canon_sha256":"4c0d29266821efbe2d8a9a5fb578de7659c12244cc5776544935a872f78c841d"},"schema_version":"1.0"},"canonical_sha256":"9e2482be671dc139c9e61a870ef54fe0f53faf9db114f2dce62e2003a725a282","source":{"kind":"arxiv","id":"2502.05527","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2502.05527","created_at":"2026-07-05T11:11:41Z"},{"alias_kind":"arxiv_version","alias_value":"2502.05527v1","created_at":"2026-07-05T11:11:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2502.05527","created_at":"2026-07-05T11:11:41Z"},{"alias_kind":"pith_short_12","alias_value":"TYSIFPTHDXAT","created_at":"2026-07-05T11:11:41Z"},{"alias_kind":"pith_short_16","alias_value":"TYSIFPTHDXATTSPG","created_at":"2026-07-05T11:11:41Z"},{"alias_kind":"pith_short_8","alias_value":"TYSIFPTH","created_at":"2026-07-05T11:11:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:TYSIFPTHDXATTSPGDKDQ55KP4D","target":"record","payload":{"canonical_record":{"source":{"id":"2502.05527","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2025-02-08T11:17:44Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"9991f6f1ad11bfca9155c05a2e3066a6a6200b7eb9759ffba053fa8c3a1f1c88","abstract_canon_sha256":"4c0d29266821efbe2d8a9a5fb578de7659c12244cc5776544935a872f78c841d"},"schema_version":"1.0"},"canonical_sha256":"9e2482be671dc139c9e61a870ef54fe0f53faf9db114f2dce62e2003a725a282","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:11:41.020508Z","signature_b64":"IIXCYMy8tKAaWt/yL3VAL9EGUyDcvyDZco+QuK8xTckP37pYMnAsfnw5HHkqe+op0byG1yl1ZYw3QMLciso2Dw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9e2482be671dc139c9e61a870ef54fe0f53faf9db114f2dce62e2003a725a282","last_reissued_at":"2026-07-05T11:11:41.020011Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:11:41.020011Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2502.05527","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":"2026-07-05T11:11:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"u1Uyxa1B+gapxvUjHWccrZ/yADiEhQ6KNvj5NuYFMnllTOFMG6Oj2qKKInjp6nn4Vd2xSY7L4RIMR8fpEsK7Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T19:54:11.621081Z"},"content_sha256":"3cb21e5285dabdd6ce31cf1df17715e9226aabb7a89f0a6814e40af033805c97","schema_version":"1.0","event_id":"sha256:3cb21e5285dabdd6ce31cf1df17715e9226aabb7a89f0a6814e40af033805c97"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:TYSIFPTHDXATTSPGDKDQ55KP4D","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Preserving Twist-Angle in Marginally Twisted Double-Bilayer Graphene Devices During Fabrication","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.mes-hall","authors_text":"Boknam Chae, Gil-Ho Lee, Hyeon-Woo Jeong, Jiho Kim, Kenji Watanabe, Takashi Taniguchi","submitted_at":"2025-02-08T11:17:44Z","abstract_excerpt":"Twisted van der Waals heterostructures provide a platform for studying a wide range of electron correlation phenomena, including unconventional superconductivity and correlated insulating states. However, fabricating such devices is challenging due to the difficulty in achieving and maintaining homogeneous twist-angles. Here, we present a fabrication method to preserve the twist-angle with minimal deformation. We fabricated marginally twisted double-bilayer graphene (mTDBG) stacks and directly imaged the resulting triangular superlattice periodicity via scattering-type scanning near-field opti"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2502.05527","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/2502.05527/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":"2026-07-05T11:11:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"b9hQUJ7XIcFTJRZgFkVoX+SgSoZd7P/9q9nVLBfuMbtuvR42s3rHdOuXF7PJ8M5/Bx11FmbY27ifGOLhpOIdCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T19:54:11.621739Z"},"content_sha256":"4503cf1d9102e8e0a3a80935ba54ac741e1b820b02f030457f9f9a3695a5cbb7","schema_version":"1.0","event_id":"sha256:4503cf1d9102e8e0a3a80935ba54ac741e1b820b02f030457f9f9a3695a5cbb7"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/TYSIFPTHDXATTSPGDKDQ55KP4D/bundle.json","state_url":"https://pith.science/pith/TYSIFPTHDXATTSPGDKDQ55KP4D/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/TYSIFPTHDXATTSPGDKDQ55KP4D/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":"2026-08-14T19:54:11Z","links":{"resolver":"https://pith.science/pith/TYSIFPTHDXATTSPGDKDQ55KP4D","bundle":"https://pith.science/pith/TYSIFPTHDXATTSPGDKDQ55KP4D/bundle.json","state":"https://pith.science/pith/TYSIFPTHDXATTSPGDKDQ55KP4D/state.json","well_known_bundle":"https://pith.science/.well-known/pith/TYSIFPTHDXATTSPGDKDQ55KP4D/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:TYSIFPTHDXATTSPGDKDQ55KP4D","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":"4c0d29266821efbe2d8a9a5fb578de7659c12244cc5776544935a872f78c841d","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2025-02-08T11:17:44Z","title_canon_sha256":"9991f6f1ad11bfca9155c05a2e3066a6a6200b7eb9759ffba053fa8c3a1f1c88"},"schema_version":"1.0","source":{"id":"2502.05527","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2502.05527","created_at":"2026-07-05T11:11:41Z"},{"alias_kind":"arxiv_version","alias_value":"2502.05527v1","created_at":"2026-07-05T11:11:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2502.05527","created_at":"2026-07-05T11:11:41Z"},{"alias_kind":"pith_short_12","alias_value":"TYSIFPTHDXAT","created_at":"2026-07-05T11:11:41Z"},{"alias_kind":"pith_short_16","alias_value":"TYSIFPTHDXATTSPG","created_at":"2026-07-05T11:11:41Z"},{"alias_kind":"pith_short_8","alias_value":"TYSIFPTH","created_at":"2026-07-05T11:11:41Z"}],"graph_snapshots":[{"event_id":"sha256:4503cf1d9102e8e0a3a80935ba54ac741e1b820b02f030457f9f9a3695a5cbb7","target":"graph","created_at":"2026-07-05T11:11:41Z","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/2502.05527/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Twisted van der Waals heterostructures provide a platform for studying a wide range of electron correlation phenomena, including unconventional superconductivity and correlated insulating states. However, fabricating such devices is challenging due to the difficulty in achieving and maintaining homogeneous twist-angles. Here, we present a fabrication method to preserve the twist-angle with minimal deformation. We fabricated marginally twisted double-bilayer graphene (mTDBG) stacks and directly imaged the resulting triangular superlattice periodicity via scattering-type scanning near-field opti","authors_text":"Boknam Chae, Gil-Ho Lee, Hyeon-Woo Jeong, Jiho Kim, Kenji Watanabe, Takashi Taniguchi","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2025-02-08T11:17:44Z","title":"Preserving Twist-Angle in Marginally Twisted Double-Bilayer Graphene Devices During Fabrication"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2502.05527","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":"sha256:3cb21e5285dabdd6ce31cf1df17715e9226aabb7a89f0a6814e40af033805c97","target":"record","created_at":"2026-07-05T11:11:41Z","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":"4c0d29266821efbe2d8a9a5fb578de7659c12244cc5776544935a872f78c841d","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2025-02-08T11:17:44Z","title_canon_sha256":"9991f6f1ad11bfca9155c05a2e3066a6a6200b7eb9759ffba053fa8c3a1f1c88"},"schema_version":"1.0","source":{"id":"2502.05527","kind":"arxiv","version":1}},"canonical_sha256":"9e2482be671dc139c9e61a870ef54fe0f53faf9db114f2dce62e2003a725a282","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9e2482be671dc139c9e61a870ef54fe0f53faf9db114f2dce62e2003a725a282","first_computed_at":"2026-07-05T11:11:41.020011Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:11:41.020011Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"IIXCYMy8tKAaWt/yL3VAL9EGUyDcvyDZco+QuK8xTckP37pYMnAsfnw5HHkqe+op0byG1yl1ZYw3QMLciso2Dw==","signature_status":"signed_v1","signed_at":"2026-07-05T11:11:41.020508Z","signed_message":"canonical_sha256_bytes"},"source_id":"2502.05527","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3cb21e5285dabdd6ce31cf1df17715e9226aabb7a89f0a6814e40af033805c97","sha256:4503cf1d9102e8e0a3a80935ba54ac741e1b820b02f030457f9f9a3695a5cbb7"],"state_sha256":"83c335f1d39d7e41854f597b9a31f2b885f6df7a5fc301c68aad792b5155ac18"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EYLdULuDacFozOz+6QVjBIwZpiHp2YShdsNg5WbevM1Z/EtKMOkzeIPK4bP+at+Yu0TQEvv5aWbXPbPO9O0lDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T19:54:11.627719Z","bundle_sha256":"a07fca2fc1f3d0b153c88258d803a55e50a4bc3075695c0b6b8fded7c21ee693"}}