{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:AEF3WVCPPGMVJ5KACHOCW4XJQJ","short_pith_number":"pith:AEF3WVCP","canonical_record":{"source":{"id":"1202.4774","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2012-02-21T21:42:41Z","cross_cats_sorted":["cond-mat.supr-con"],"title_canon_sha256":"ac62a2f7e648cf845236946c6c1e743e2cf4f4e39b5a71ef81373b6399d98308","abstract_canon_sha256":"910687b7eb7cd987e4b5dd0e42924149db5aa9ad0da9d7d3923b2d6074097c9b"},"schema_version":"1.0"},"canonical_sha256":"010bbb544f799954f54011dc2b72e98270ea41402a414e131d1222b434a19887","source":{"kind":"arxiv","id":"1202.4774","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1202.4774","created_at":"2026-05-18T03:56:21Z"},{"alias_kind":"arxiv_version","alias_value":"1202.4774v1","created_at":"2026-05-18T03:56:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.4774","created_at":"2026-05-18T03:56:21Z"},{"alias_kind":"pith_short_12","alias_value":"AEF3WVCPPGMV","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"AEF3WVCPPGMVJ5KA","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"AEF3WVCP","created_at":"2026-05-18T12:26:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:AEF3WVCPPGMVJ5KACHOCW4XJQJ","target":"record","payload":{"canonical_record":{"source":{"id":"1202.4774","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2012-02-21T21:42:41Z","cross_cats_sorted":["cond-mat.supr-con"],"title_canon_sha256":"ac62a2f7e648cf845236946c6c1e743e2cf4f4e39b5a71ef81373b6399d98308","abstract_canon_sha256":"910687b7eb7cd987e4b5dd0e42924149db5aa9ad0da9d7d3923b2d6074097c9b"},"schema_version":"1.0"},"canonical_sha256":"010bbb544f799954f54011dc2b72e98270ea41402a414e131d1222b434a19887","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:56:21.966815Z","signature_b64":"bpmu7QpWMepr9LPw3K1S2VAeV7lboU/wz0qE/8ePrIKMBV2r/VcJ+H/Mp1utQHt13NCXITrlyNPuu0/gD0R/Dg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"010bbb544f799954f54011dc2b72e98270ea41402a414e131d1222b434a19887","last_reissued_at":"2026-05-18T03:56:21.965715Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:56:21.965715Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1202.4774","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":"2026-05-18T03:56:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jW4FrOWnyzYccdBiJUDdlvcio9WEekOgVzYcdcEwIVpTNCnHew3bfTlcDvglSlj94gB2AU1PBE0XKpTtD7HZDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T17:21:33.452068Z"},"content_sha256":"a73b90ce0d836211afb9efe34d7d0a8a782d57a34d35b245d38298af018d8ed8","schema_version":"1.0","event_id":"sha256:a73b90ce0d836211afb9efe34d7d0a8a782d57a34d35b245d38298af018d8ed8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:AEF3WVCPPGMVJ5KACHOCW4XJQJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Zero-bias conductance peak and Josephson effect in graphene-NbTiN junctions","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.supr-con"],"primary_cat":"cond-mat.mes-hall","authors_text":"Anton R. Akhmerov, Lieven M. K. Vandersypen, Mihai Popinciuc, Teun M. Klapwijk, Victor E. Calado, Xing L. Liu","submitted_at":"2012-02-21T21:42:41Z","abstract_excerpt":"We report electronic transport measurements of graphene contacted by NbTiN electrodes, which at low temperature remain superconducting up to at least 11 Tesla. In devices with a single superconducting contact, we find a more than twofold enhancement of the conductance at zero bias, which we interpret in terms of reflectionless tunneling. In devices with two superconducting contacts, we observe the Josephson effect, bipolar supercurrents and Fraunhofer patterns."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.4774","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":""},"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":"2026-05-18T03:56:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oD9aa9GOk3l9u6lHysZZO2rruXP0PZHrOUpmTK6O+7Q0NphlNAnH/stl9GgX59i7MvxPYRzjMfhd015R9hifAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T17:21:33.452813Z"},"content_sha256":"cb02adac7a6488c8ae7255332f6b3a09b250d7dadb9c1ad7b91fe9d83ce0d58c","schema_version":"1.0","event_id":"sha256:cb02adac7a6488c8ae7255332f6b3a09b250d7dadb9c1ad7b91fe9d83ce0d58c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AEF3WVCPPGMVJ5KACHOCW4XJQJ/bundle.json","state_url":"https://pith.science/pith/AEF3WVCPPGMVJ5KACHOCW4XJQJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AEF3WVCPPGMVJ5KACHOCW4XJQJ/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":"2026-05-25T17:21:33Z","links":{"resolver":"https://pith.science/pith/AEF3WVCPPGMVJ5KACHOCW4XJQJ","bundle":"https://pith.science/pith/AEF3WVCPPGMVJ5KACHOCW4XJQJ/bundle.json","state":"https://pith.science/pith/AEF3WVCPPGMVJ5KACHOCW4XJQJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AEF3WVCPPGMVJ5KACHOCW4XJQJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:AEF3WVCPPGMVJ5KACHOCW4XJQJ","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":"910687b7eb7cd987e4b5dd0e42924149db5aa9ad0da9d7d3923b2d6074097c9b","cross_cats_sorted":["cond-mat.supr-con"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2012-02-21T21:42:41Z","title_canon_sha256":"ac62a2f7e648cf845236946c6c1e743e2cf4f4e39b5a71ef81373b6399d98308"},"schema_version":"1.0","source":{"id":"1202.4774","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1202.4774","created_at":"2026-05-18T03:56:21Z"},{"alias_kind":"arxiv_version","alias_value":"1202.4774v1","created_at":"2026-05-18T03:56:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.4774","created_at":"2026-05-18T03:56:21Z"},{"alias_kind":"pith_short_12","alias_value":"AEF3WVCPPGMV","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_16","alias_value":"AEF3WVCPPGMVJ5KA","created_at":"2026-05-18T12:26:58Z"},{"alias_kind":"pith_short_8","alias_value":"AEF3WVCP","created_at":"2026-05-18T12:26:58Z"}],"graph_snapshots":[{"event_id":"sha256:cb02adac7a6488c8ae7255332f6b3a09b250d7dadb9c1ad7b91fe9d83ce0d58c","target":"graph","created_at":"2026-05-18T03:56:21Z","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"},"paper":{"abstract_excerpt":"We report electronic transport measurements of graphene contacted by NbTiN electrodes, which at low temperature remain superconducting up to at least 11 Tesla. In devices with a single superconducting contact, we find a more than twofold enhancement of the conductance at zero bias, which we interpret in terms of reflectionless tunneling. In devices with two superconducting contacts, we observe the Josephson effect, bipolar supercurrents and Fraunhofer patterns.","authors_text":"Anton R. Akhmerov, Lieven M. K. Vandersypen, Mihai Popinciuc, Teun M. Klapwijk, Victor E. Calado, Xing L. Liu","cross_cats":["cond-mat.supr-con"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2012-02-21T21:42:41Z","title":"Zero-bias conductance peak and Josephson effect in graphene-NbTiN junctions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.4774","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:a73b90ce0d836211afb9efe34d7d0a8a782d57a34d35b245d38298af018d8ed8","target":"record","created_at":"2026-05-18T03:56:21Z","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":"910687b7eb7cd987e4b5dd0e42924149db5aa9ad0da9d7d3923b2d6074097c9b","cross_cats_sorted":["cond-mat.supr-con"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mes-hall","submitted_at":"2012-02-21T21:42:41Z","title_canon_sha256":"ac62a2f7e648cf845236946c6c1e743e2cf4f4e39b5a71ef81373b6399d98308"},"schema_version":"1.0","source":{"id":"1202.4774","kind":"arxiv","version":1}},"canonical_sha256":"010bbb544f799954f54011dc2b72e98270ea41402a414e131d1222b434a19887","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"010bbb544f799954f54011dc2b72e98270ea41402a414e131d1222b434a19887","first_computed_at":"2026-05-18T03:56:21.965715Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:56:21.965715Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bpmu7QpWMepr9LPw3K1S2VAeV7lboU/wz0qE/8ePrIKMBV2r/VcJ+H/Mp1utQHt13NCXITrlyNPuu0/gD0R/Dg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:56:21.966815Z","signed_message":"canonical_sha256_bytes"},"source_id":"1202.4774","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a73b90ce0d836211afb9efe34d7d0a8a782d57a34d35b245d38298af018d8ed8","sha256:cb02adac7a6488c8ae7255332f6b3a09b250d7dadb9c1ad7b91fe9d83ce0d58c"],"state_sha256":"4ac059e3cecd3bf4ae9621e3ae5fa119c66ce5b4e084b5df235b36afec3b6744"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ikI1MmXmbCn1CaMb0UQ9nPYY0fPNz/Dd+nacowvQGwYVKlWUxLDwhLBVsbDY+sKLkFu/NYIMMHuJ1JM6P4kVDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T17:21:33.457283Z","bundle_sha256":"8f2c9d208017c4d2921736e439b73c26dce528593ec8df2d7ee424170da22398"}}