{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:FLJ54E2LM6QPTWGYAM2DXINJVY","short_pith_number":"pith:FLJ54E2L","canonical_record":{"source":{"id":"2502.04785","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2025-02-07T09:43:25Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"68563dc89b8613beccd02ca6d609ab3153de5b34f717c6d3b404750a0eb826ea","abstract_canon_sha256":"a3e90e7306964a64a64ec0c06db71e9320c29fbc22affb81dec24bc30b972d09"},"schema_version":"1.0"},"canonical_sha256":"2ad3de134b67a0f9d8d803343ba1a9ae0a1d124e48686f177726529f647ac0a0","source":{"kind":"arxiv","id":"2502.04785","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2502.04785","created_at":"2026-07-05T10:10:57Z"},{"alias_kind":"arxiv_version","alias_value":"2502.04785v1","created_at":"2026-07-05T10:10:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2502.04785","created_at":"2026-07-05T10:10:57Z"},{"alias_kind":"pith_short_12","alias_value":"FLJ54E2LM6QP","created_at":"2026-07-05T10:10:57Z"},{"alias_kind":"pith_short_16","alias_value":"FLJ54E2LM6QPTWGY","created_at":"2026-07-05T10:10:57Z"},{"alias_kind":"pith_short_8","alias_value":"FLJ54E2L","created_at":"2026-07-05T10:10:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:FLJ54E2LM6QPTWGYAM2DXINJVY","target":"record","payload":{"canonical_record":{"source":{"id":"2502.04785","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2025-02-07T09:43:25Z","cross_cats_sorted":["cond-mat.str-el"],"title_canon_sha256":"68563dc89b8613beccd02ca6d609ab3153de5b34f717c6d3b404750a0eb826ea","abstract_canon_sha256":"a3e90e7306964a64a64ec0c06db71e9320c29fbc22affb81dec24bc30b972d09"},"schema_version":"1.0"},"canonical_sha256":"2ad3de134b67a0f9d8d803343ba1a9ae0a1d124e48686f177726529f647ac0a0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:10:57.220403Z","signature_b64":"fjbCAmkklaPTld8bRF/3jMlMCgwWdMy7hMzTFPZCYN0CZ1+XDeNcc8g8T8J7V0KpnRo0If+BSWF2S+QOswnADw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2ad3de134b67a0f9d8d803343ba1a9ae0a1d124e48686f177726529f647ac0a0","last_reissued_at":"2026-07-05T10:10:57.219873Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:10:57.219873Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2502.04785","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":"2026-07-05T10:10:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EbhMfVTlmKS2TYfpQ+WDDUEuVMMcSAlTIXUcn18+SopO+l73V2iBZGPDYFRP7o1+KZhQqJ0HvQNEdmQWlvnlBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T20:01:24.593632Z"},"content_sha256":"300b94d925822c51e9e20ebf1f83ebb500d88972c313828d274d599ccbe7744f","schema_version":"1.0","event_id":"sha256:300b94d925822c51e9e20ebf1f83ebb500d88972c313828d274d599ccbe7744f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:FLJ54E2LM6QPTWGYAM2DXINJVY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Probing the flat-band limit of the superconducting proximity effect in Twisted Bilayer Graphene Josephson junctions","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.supr-con","authors_text":"A. Diez-Carlon, D. K. Efetov, D. Sedov, J. Diez-Merida, K. T. Law, K. Watanabe, M. S. Scheurer, P. Altpeter, P. Rout, P. Torma, P. Virtanen, R. P. S. Penttila, S. Banerjee, S.-Y. Yang, T. Taniguchi, T. T. Heikkila","submitted_at":"2025-02-07T09:43:25Z","abstract_excerpt":"While extensively studied in normal metals, semimetals and semiconductors, the superconducting (SC) proximity effect remains elusive in the emerging field of flat-band systems. In this study we probe proximity-induced superconductivity in Josephson junctions (JJs) formed between superconducting NbTiN electrodes and twisted bilayer graphene (TBG) weak links. Here the TBG acts as a highly tunable topological flat-band system, which due to its twist-angle dependent bandwidth, allows to probe the SC proximity effect at the crossover from the dispersive to the flat-band limit. Contrary to our origi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2502.04785","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/2502.04785/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":"2026-07-05T10:10:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8zKVGsWenFOgMOVFI6yKWGE1cdHae1zSKyGiTzvV+MyHRPVK9AF4Qz0zUdEHAi5Ols8DqBbw5fCte0XSdwubDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-01T20:01:24.594161Z"},"content_sha256":"f6bf14bcbc598bea531f4dd94a8e5bc352f951c8e2ecf8296dded2b2aa048497","schema_version":"1.0","event_id":"sha256:f6bf14bcbc598bea531f4dd94a8e5bc352f951c8e2ecf8296dded2b2aa048497"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FLJ54E2LM6QPTWGYAM2DXINJVY/bundle.json","state_url":"https://pith.science/pith/FLJ54E2LM6QPTWGYAM2DXINJVY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FLJ54E2LM6QPTWGYAM2DXINJVY/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":"2026-08-01T20:01:24Z","links":{"resolver":"https://pith.science/pith/FLJ54E2LM6QPTWGYAM2DXINJVY","bundle":"https://pith.science/pith/FLJ54E2LM6QPTWGYAM2DXINJVY/bundle.json","state":"https://pith.science/pith/FLJ54E2LM6QPTWGYAM2DXINJVY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FLJ54E2LM6QPTWGYAM2DXINJVY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:FLJ54E2LM6QPTWGYAM2DXINJVY","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":"a3e90e7306964a64a64ec0c06db71e9320c29fbc22affb81dec24bc30b972d09","cross_cats_sorted":["cond-mat.str-el"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2025-02-07T09:43:25Z","title_canon_sha256":"68563dc89b8613beccd02ca6d609ab3153de5b34f717c6d3b404750a0eb826ea"},"schema_version":"1.0","source":{"id":"2502.04785","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2502.04785","created_at":"2026-07-05T10:10:57Z"},{"alias_kind":"arxiv_version","alias_value":"2502.04785v1","created_at":"2026-07-05T10:10:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2502.04785","created_at":"2026-07-05T10:10:57Z"},{"alias_kind":"pith_short_12","alias_value":"FLJ54E2LM6QP","created_at":"2026-07-05T10:10:57Z"},{"alias_kind":"pith_short_16","alias_value":"FLJ54E2LM6QPTWGY","created_at":"2026-07-05T10:10:57Z"},{"alias_kind":"pith_short_8","alias_value":"FLJ54E2L","created_at":"2026-07-05T10:10:57Z"}],"graph_snapshots":[{"event_id":"sha256:f6bf14bcbc598bea531f4dd94a8e5bc352f951c8e2ecf8296dded2b2aa048497","target":"graph","created_at":"2026-07-05T10:10:57Z","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/2502.04785/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"While extensively studied in normal metals, semimetals and semiconductors, the superconducting (SC) proximity effect remains elusive in the emerging field of flat-band systems. In this study we probe proximity-induced superconductivity in Josephson junctions (JJs) formed between superconducting NbTiN electrodes and twisted bilayer graphene (TBG) weak links. Here the TBG acts as a highly tunable topological flat-band system, which due to its twist-angle dependent bandwidth, allows to probe the SC proximity effect at the crossover from the dispersive to the flat-band limit. Contrary to our origi","authors_text":"A. Diez-Carlon, D. K. Efetov, D. Sedov, J. Diez-Merida, K. T. Law, K. Watanabe, M. S. Scheurer, P. Altpeter, P. Rout, P. Torma, P. Virtanen, R. P. S. Penttila, S. Banerjee, S.-Y. Yang, T. Taniguchi, T. T. Heikkila","cross_cats":["cond-mat.str-el"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2025-02-07T09:43:25Z","title":"Probing the flat-band limit of the superconducting proximity effect in Twisted Bilayer Graphene Josephson junctions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2502.04785","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":"sha256:300b94d925822c51e9e20ebf1f83ebb500d88972c313828d274d599ccbe7744f","target":"record","created_at":"2026-07-05T10:10:57Z","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":"a3e90e7306964a64a64ec0c06db71e9320c29fbc22affb81dec24bc30b972d09","cross_cats_sorted":["cond-mat.str-el"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2025-02-07T09:43:25Z","title_canon_sha256":"68563dc89b8613beccd02ca6d609ab3153de5b34f717c6d3b404750a0eb826ea"},"schema_version":"1.0","source":{"id":"2502.04785","kind":"arxiv","version":1}},"canonical_sha256":"2ad3de134b67a0f9d8d803343ba1a9ae0a1d124e48686f177726529f647ac0a0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2ad3de134b67a0f9d8d803343ba1a9ae0a1d124e48686f177726529f647ac0a0","first_computed_at":"2026-07-05T10:10:57.219873Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:10:57.219873Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"fjbCAmkklaPTld8bRF/3jMlMCgwWdMy7hMzTFPZCYN0CZ1+XDeNcc8g8T8J7V0KpnRo0If+BSWF2S+QOswnADw==","signature_status":"signed_v1","signed_at":"2026-07-05T10:10:57.220403Z","signed_message":"canonical_sha256_bytes"},"source_id":"2502.04785","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:300b94d925822c51e9e20ebf1f83ebb500d88972c313828d274d599ccbe7744f","sha256:f6bf14bcbc598bea531f4dd94a8e5bc352f951c8e2ecf8296dded2b2aa048497"],"state_sha256":"c0b7873403d1ed699623cb8286606cf93ca21f614ef11e692103e057dcd32605"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"S6YOR0ksGgbeGBNL5vVvDa6fydw3ypBnbVSx5ixYMGxDlejUS9N94SyHR7Dwao4flKr/8LhAyQ45YHP/beI6CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-01T20:01:24.597716Z","bundle_sha256":"f87de6f988d492eb3e458c54f56a34718c7e8417654b79a34507908aa1fda0a0"}}