{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:BYDD3IFRH7336H4M3GFEICKSCP","short_pith_number":"pith:BYDD3IFR","canonical_record":{"source":{"id":"2502.11076","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2025-02-16T10:52:48Z","cross_cats_sorted":["cond-mat.mtrl-sci","physics.app-ph","physics.ins-det","quant-ph"],"title_canon_sha256":"7d7513ced78ba2033d457fc8cf8dd696264864a6655f4efe1919b96f02c2cbec","abstract_canon_sha256":"4c17715b1c025577900b649300b287373a1ee9108987389e9209f08b36d4a470"},"schema_version":"1.0"},"canonical_sha256":"0e063da0b13ff7bf1f8cd98a44095213e5d721a1576574cee3ef598543819ec8","source":{"kind":"arxiv","id":"2502.11076","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2502.11076","created_at":"2026-07-05T10:15:03Z"},{"alias_kind":"arxiv_version","alias_value":"2502.11076v1","created_at":"2026-07-05T10:15:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2502.11076","created_at":"2026-07-05T10:15:03Z"},{"alias_kind":"pith_short_12","alias_value":"BYDD3IFRH733","created_at":"2026-07-05T10:15:03Z"},{"alias_kind":"pith_short_16","alias_value":"BYDD3IFRH7336H4M","created_at":"2026-07-05T10:15:03Z"},{"alias_kind":"pith_short_8","alias_value":"BYDD3IFR","created_at":"2026-07-05T10:15:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:BYDD3IFRH7336H4M3GFEICKSCP","target":"record","payload":{"canonical_record":{"source":{"id":"2502.11076","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2025-02-16T10:52:48Z","cross_cats_sorted":["cond-mat.mtrl-sci","physics.app-ph","physics.ins-det","quant-ph"],"title_canon_sha256":"7d7513ced78ba2033d457fc8cf8dd696264864a6655f4efe1919b96f02c2cbec","abstract_canon_sha256":"4c17715b1c025577900b649300b287373a1ee9108987389e9209f08b36d4a470"},"schema_version":"1.0"},"canonical_sha256":"0e063da0b13ff7bf1f8cd98a44095213e5d721a1576574cee3ef598543819ec8","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:15:03.441447Z","signature_b64":"lJ8Cvte+sxrif3fmI3PoweYA/rRZBM+o743dMDDR7E/83nGvMIXfWBcWpo72HR/l9lFA1a4GMZu3VcvW71dxDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0e063da0b13ff7bf1f8cd98a44095213e5d721a1576574cee3ef598543819ec8","last_reissued_at":"2026-07-05T10:15:03.440939Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:15:03.440939Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2502.11076","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":"2026-07-05T10:15:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"nkfniv7o75y4QY5J8pe/8hOiGwKigHVtSE5Zz4+8i5ZTDV7M9SW9zb/pC30Nltca5dTsDmurEPui6bSvl84xBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T13:16:09.764443Z"},"content_sha256":"74a76289fd2a99cfc2f4ff531bafb23380f59e2c98d7c88ac7d693f967ebd80c","schema_version":"1.0","event_id":"sha256:74a76289fd2a99cfc2f4ff531bafb23380f59e2c98d7c88ac7d693f967ebd80c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:BYDD3IFRH7336H4M3GFEICKSCP","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Imaging current flow and injection in scalable graphene devices through NV-magnetometry","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci","physics.app-ph","physics.ins-det","quant-ph"],"primary_cat":"cond-mat.mes-hall","authors_text":"Abbas Mohtashami, Clara I. Osorio, Gabriele Bulgarini, Kaj Dockx, Leon van Dooren, Michele Buscema, Richard van Rijn, Saravana Kumar, Tijmen van Ree, Toeno van der Sar","submitted_at":"2025-02-16T10:52:48Z","abstract_excerpt":"The global electronic properties of solid-state devices are strongly affected by the microscopic spatial paths of charge carriers. Visualising these paths in novel devices produced by scalable processes would provide a quality assessment method that can propel the device performance metrics towards commercial use. Here, we use high-resolution nitrogen-vacancy (NV) magnetometry to visualise the charge flow in gold-contacted, single-layer graphene devices produced by scalable methods. Modulating the majority carrier type via field effect reveals a strong asymmetry between the spatial current dis"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2502.11076","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/2502.11076/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":"2026-07-05T10:15:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qaYC3wbONOxM3fxUKK+9HVYJTkxURE7TdshMO+oGF83cR0MyXw4uT3+OPxs0JpAgAUT3B3snPTMhHH7KoAOGBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T13:16:09.765349Z"},"content_sha256":"3cc0616c1fd35c277a43a2d9e18b2c5e6c5903f4c4073416db63dce5054ce4ef","schema_version":"1.0","event_id":"sha256:3cc0616c1fd35c277a43a2d9e18b2c5e6c5903f4c4073416db63dce5054ce4ef"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BYDD3IFRH7336H4M3GFEICKSCP/bundle.json","state_url":"https://pith.science/pith/BYDD3IFRH7336H4M3GFEICKSCP/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BYDD3IFRH7336H4M3GFEICKSCP/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":"2026-08-05T13:16:09Z","links":{"resolver":"https://pith.science/pith/BYDD3IFRH7336H4M3GFEICKSCP","bundle":"https://pith.science/pith/BYDD3IFRH7336H4M3GFEICKSCP/bundle.json","state":"https://pith.science/pith/BYDD3IFRH7336H4M3GFEICKSCP/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BYDD3IFRH7336H4M3GFEICKSCP/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:BYDD3IFRH7336H4M3GFEICKSCP","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":"4c17715b1c025577900b649300b287373a1ee9108987389e9209f08b36d4a470","cross_cats_sorted":["cond-mat.mtrl-sci","physics.app-ph","physics.ins-det","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2025-02-16T10:52:48Z","title_canon_sha256":"7d7513ced78ba2033d457fc8cf8dd696264864a6655f4efe1919b96f02c2cbec"},"schema_version":"1.0","source":{"id":"2502.11076","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2502.11076","created_at":"2026-07-05T10:15:03Z"},{"alias_kind":"arxiv_version","alias_value":"2502.11076v1","created_at":"2026-07-05T10:15:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2502.11076","created_at":"2026-07-05T10:15:03Z"},{"alias_kind":"pith_short_12","alias_value":"BYDD3IFRH733","created_at":"2026-07-05T10:15:03Z"},{"alias_kind":"pith_short_16","alias_value":"BYDD3IFRH7336H4M","created_at":"2026-07-05T10:15:03Z"},{"alias_kind":"pith_short_8","alias_value":"BYDD3IFR","created_at":"2026-07-05T10:15:03Z"}],"graph_snapshots":[{"event_id":"sha256:3cc0616c1fd35c277a43a2d9e18b2c5e6c5903f4c4073416db63dce5054ce4ef","target":"graph","created_at":"2026-07-05T10:15:03Z","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/2502.11076/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The global electronic properties of solid-state devices are strongly affected by the microscopic spatial paths of charge carriers. Visualising these paths in novel devices produced by scalable processes would provide a quality assessment method that can propel the device performance metrics towards commercial use. Here, we use high-resolution nitrogen-vacancy (NV) magnetometry to visualise the charge flow in gold-contacted, single-layer graphene devices produced by scalable methods. Modulating the majority carrier type via field effect reveals a strong asymmetry between the spatial current dis","authors_text":"Abbas Mohtashami, Clara I. Osorio, Gabriele Bulgarini, Kaj Dockx, Leon van Dooren, Michele Buscema, Richard van Rijn, Saravana Kumar, Tijmen van Ree, Toeno van der Sar","cross_cats":["cond-mat.mtrl-sci","physics.app-ph","physics.ins-det","quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2025-02-16T10:52:48Z","title":"Imaging current flow and injection in scalable graphene devices through NV-magnetometry"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2502.11076","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":"sha256:74a76289fd2a99cfc2f4ff531bafb23380f59e2c98d7c88ac7d693f967ebd80c","target":"record","created_at":"2026-07-05T10:15:03Z","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":"4c17715b1c025577900b649300b287373a1ee9108987389e9209f08b36d4a470","cross_cats_sorted":["cond-mat.mtrl-sci","physics.app-ph","physics.ins-det","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2025-02-16T10:52:48Z","title_canon_sha256":"7d7513ced78ba2033d457fc8cf8dd696264864a6655f4efe1919b96f02c2cbec"},"schema_version":"1.0","source":{"id":"2502.11076","kind":"arxiv","version":1}},"canonical_sha256":"0e063da0b13ff7bf1f8cd98a44095213e5d721a1576574cee3ef598543819ec8","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0e063da0b13ff7bf1f8cd98a44095213e5d721a1576574cee3ef598543819ec8","first_computed_at":"2026-07-05T10:15:03.440939Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:15:03.440939Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"lJ8Cvte+sxrif3fmI3PoweYA/rRZBM+o743dMDDR7E/83nGvMIXfWBcWpo72HR/l9lFA1a4GMZu3VcvW71dxDg==","signature_status":"signed_v1","signed_at":"2026-07-05T10:15:03.441447Z","signed_message":"canonical_sha256_bytes"},"source_id":"2502.11076","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:74a76289fd2a99cfc2f4ff531bafb23380f59e2c98d7c88ac7d693f967ebd80c","sha256:3cc0616c1fd35c277a43a2d9e18b2c5e6c5903f4c4073416db63dce5054ce4ef"],"state_sha256":"35f82628493568b2c44e276f3becf24e3cf0eb0cae8fbe66c90e929ea140a376"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Q7bJpkl9y3uvAvRckqNvjvwFC38GUx8f5UPnLNBfvLG1I1DCKRtbPqeJdwhefaXg5Qi8YeCvaLVwJjSCMPdVBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T13:16:09.791847Z","bundle_sha256":"6a54ce59b792643e14be53a9558b51f9e87307d9289321b642aa978c5361523e"}}