{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:CW2WC54JXGQO226XDQB2SZBL64","short_pith_number":"pith:CW2WC54J","canonical_record":{"source":{"id":"1906.08692","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2019-06-20T15:30:58Z","cross_cats_sorted":[],"title_canon_sha256":"80f5dc15d7497d2b152c3b0c3daa8f1b2a37733a35349751668e16d4c3fc1f2d","abstract_canon_sha256":"f344fd66c9baacbb003584377c3639aef3da3f8ed7354bb8a921bb4e61548c8d"},"schema_version":"1.0"},"canonical_sha256":"15b5617789b9a0ed6bd71c03a9642bf71dec45aa1552dfe7c028c305be96e3c5","source":{"kind":"arxiv","id":"1906.08692","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.08692","created_at":"2026-05-17T23:42:49Z"},{"alias_kind":"arxiv_version","alias_value":"1906.08692v1","created_at":"2026-05-17T23:42:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.08692","created_at":"2026-05-17T23:42:49Z"},{"alias_kind":"pith_short_12","alias_value":"CW2WC54JXGQO","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"CW2WC54JXGQO226X","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"CW2WC54J","created_at":"2026-05-18T12:33:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:CW2WC54JXGQO226XDQB2SZBL64","target":"record","payload":{"canonical_record":{"source":{"id":"1906.08692","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2019-06-20T15:30:58Z","cross_cats_sorted":[],"title_canon_sha256":"80f5dc15d7497d2b152c3b0c3daa8f1b2a37733a35349751668e16d4c3fc1f2d","abstract_canon_sha256":"f344fd66c9baacbb003584377c3639aef3da3f8ed7354bb8a921bb4e61548c8d"},"schema_version":"1.0"},"canonical_sha256":"15b5617789b9a0ed6bd71c03a9642bf71dec45aa1552dfe7c028c305be96e3c5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:42:49.559936Z","signature_b64":"6f2KJr2mQ/Z++lqB6sz7UA5BptPO7e0KK8EyLgsI88x07b7MOZB2OsXwq8EGm6qRdoFuotITNdPJzrtXptDtBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"15b5617789b9a0ed6bd71c03a9642bf71dec45aa1552dfe7c028c305be96e3c5","last_reissued_at":"2026-05-17T23:42:49.559427Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:42:49.559427Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1906.08692","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":"2026-05-17T23:42:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pZy3i83YQz4GvCcXXzbBZUGuxtzhHBplO07vufPUdYIWYg6YHg8aMmSboGaVSQCG3L4FBHa9sgz4u2plb0KNCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T03:39:52.724435Z"},"content_sha256":"5d73316bebddc51b135e71bcd16d9625fe1a786237da5533c92a25310051ff99","schema_version":"1.0","event_id":"sha256:5d73316bebddc51b135e71bcd16d9625fe1a786237da5533c92a25310051ff99"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:CW2WC54JXGQO226XDQB2SZBL64","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Substrate mediated nitridation of niobium into superconducting Nb2N thin films for phase slip study","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"Anurag Gupta, Bikash Gajar, Deepika Sawle, Kamlesh K. Maurya, R.P. Aloysius, Sachin Yadav, Sangeeta Sahoo","submitted_at":"2019-06-20T15:30:58Z","abstract_excerpt":"Here we report a novel nitridation technique for transforming niobium into hexagonal Nb2N which appears to be superconducting below 1K. The nitridation is achieved by high temperature annealing of Nb films grown on Si3N4/Si (100) substrate under high vacuum. The structural characterization directs the formation of a majority Nb2N phase while the morphology shows granular nature of the films. The temperature dependent resistance measurements reveal a wide metal-to-superconductor transition featuring two distinct transition regions. The region close to the normal state varies strongly with the f"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.08692","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":"2026-05-17T23:42:49Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w5BaJSkzAna6tfmNDIr2jHP6FT5YROYrN1XiZbu35VK43eB1twyCOHtEguI104Qy/l90w5pCq6FgLzhb9tYRAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T03:39:52.725083Z"},"content_sha256":"c6ff3315f2d2bf9c4d2b06db42f4e1b2d1a68e61fdea5214d84c07d5ffb99cfa","schema_version":"1.0","event_id":"sha256:c6ff3315f2d2bf9c4d2b06db42f4e1b2d1a68e61fdea5214d84c07d5ffb99cfa"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CW2WC54JXGQO226XDQB2SZBL64/bundle.json","state_url":"https://pith.science/pith/CW2WC54JXGQO226XDQB2SZBL64/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CW2WC54JXGQO226XDQB2SZBL64/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":"2026-05-26T03:39:52Z","links":{"resolver":"https://pith.science/pith/CW2WC54JXGQO226XDQB2SZBL64","bundle":"https://pith.science/pith/CW2WC54JXGQO226XDQB2SZBL64/bundle.json","state":"https://pith.science/pith/CW2WC54JXGQO226XDQB2SZBL64/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CW2WC54JXGQO226XDQB2SZBL64/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:CW2WC54JXGQO226XDQB2SZBL64","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":"f344fd66c9baacbb003584377c3639aef3da3f8ed7354bb8a921bb4e61548c8d","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2019-06-20T15:30:58Z","title_canon_sha256":"80f5dc15d7497d2b152c3b0c3daa8f1b2a37733a35349751668e16d4c3fc1f2d"},"schema_version":"1.0","source":{"id":"1906.08692","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.08692","created_at":"2026-05-17T23:42:49Z"},{"alias_kind":"arxiv_version","alias_value":"1906.08692v1","created_at":"2026-05-17T23:42:49Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.08692","created_at":"2026-05-17T23:42:49Z"},{"alias_kind":"pith_short_12","alias_value":"CW2WC54JXGQO","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"CW2WC54JXGQO226X","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"CW2WC54J","created_at":"2026-05-18T12:33:15Z"}],"graph_snapshots":[{"event_id":"sha256:c6ff3315f2d2bf9c4d2b06db42f4e1b2d1a68e61fdea5214d84c07d5ffb99cfa","target":"graph","created_at":"2026-05-17T23:42:49Z","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":"Here we report a novel nitridation technique for transforming niobium into hexagonal Nb2N which appears to be superconducting below 1K. The nitridation is achieved by high temperature annealing of Nb films grown on Si3N4/Si (100) substrate under high vacuum. The structural characterization directs the formation of a majority Nb2N phase while the morphology shows granular nature of the films. The temperature dependent resistance measurements reveal a wide metal-to-superconductor transition featuring two distinct transition regions. The region close to the normal state varies strongly with the f","authors_text":"Anurag Gupta, Bikash Gajar, Deepika Sawle, Kamlesh K. Maurya, R.P. Aloysius, Sachin Yadav, Sangeeta Sahoo","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2019-06-20T15:30:58Z","title":"Substrate mediated nitridation of niobium into superconducting Nb2N thin films for phase slip study"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.08692","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":"sha256:5d73316bebddc51b135e71bcd16d9625fe1a786237da5533c92a25310051ff99","target":"record","created_at":"2026-05-17T23:42:49Z","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":"f344fd66c9baacbb003584377c3639aef3da3f8ed7354bb8a921bb4e61548c8d","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2019-06-20T15:30:58Z","title_canon_sha256":"80f5dc15d7497d2b152c3b0c3daa8f1b2a37733a35349751668e16d4c3fc1f2d"},"schema_version":"1.0","source":{"id":"1906.08692","kind":"arxiv","version":1}},"canonical_sha256":"15b5617789b9a0ed6bd71c03a9642bf71dec45aa1552dfe7c028c305be96e3c5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"15b5617789b9a0ed6bd71c03a9642bf71dec45aa1552dfe7c028c305be96e3c5","first_computed_at":"2026-05-17T23:42:49.559427Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:42:49.559427Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"6f2KJr2mQ/Z++lqB6sz7UA5BptPO7e0KK8EyLgsI88x07b7MOZB2OsXwq8EGm6qRdoFuotITNdPJzrtXptDtBg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:42:49.559936Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.08692","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5d73316bebddc51b135e71bcd16d9625fe1a786237da5533c92a25310051ff99","sha256:c6ff3315f2d2bf9c4d2b06db42f4e1b2d1a68e61fdea5214d84c07d5ffb99cfa"],"state_sha256":"eb18ae264f8b0b71717299b28d947689a1119734fb53eb6c6331015daae8d7d2"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DHhbrNpC9q24gIpFaXEMz+iH7WWig4IoE4vVsKDjvuw2bigGBW8RqzRl1hD9D31QlkSJXFGFdCU7Iz0nxKZGAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T03:39:52.728537Z","bundle_sha256":"649ca24791325d473e8b703cbeb23bbdce6e8f64e3a883ba57a4b58571dd09a9"}}