{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:DLELG7TLSVR5XR3MBTWLYXT7KW","short_pith_number":"pith:DLELG7TL","canonical_record":{"source":{"id":"1804.05519","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2018-04-16T06:55:21Z","cross_cats_sorted":[],"title_canon_sha256":"88c331e36354f3ea84a4aea49da262f232aec3023e246d4599a32acdb90f3581","abstract_canon_sha256":"622cceffefdd651fbddaf9a28f54b899b8d4c1a0a905ea5ff69f12e12b656dc0"},"schema_version":"1.0"},"canonical_sha256":"1ac8b37e6b9563dbc76c0cecbc5e7f55b19951ff30e574abd100aa3acbe06c3e","source":{"kind":"arxiv","id":"1804.05519","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.05519","created_at":"2026-05-17T23:43:06Z"},{"alias_kind":"arxiv_version","alias_value":"1804.05519v3","created_at":"2026-05-17T23:43:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.05519","created_at":"2026-05-17T23:43:06Z"},{"alias_kind":"pith_short_12","alias_value":"DLELG7TLSVR5","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_16","alias_value":"DLELG7TLSVR5XR3M","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_8","alias_value":"DLELG7TL","created_at":"2026-05-18T12:32:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:DLELG7TLSVR5XR3MBTWLYXT7KW","target":"record","payload":{"canonical_record":{"source":{"id":"1804.05519","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2018-04-16T06:55:21Z","cross_cats_sorted":[],"title_canon_sha256":"88c331e36354f3ea84a4aea49da262f232aec3023e246d4599a32acdb90f3581","abstract_canon_sha256":"622cceffefdd651fbddaf9a28f54b899b8d4c1a0a905ea5ff69f12e12b656dc0"},"schema_version":"1.0"},"canonical_sha256":"1ac8b37e6b9563dbc76c0cecbc5e7f55b19951ff30e574abd100aa3acbe06c3e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:43:06.984254Z","signature_b64":"C/JS3CFOXra7HgaZrqK3/sak9lEErSU6DuCXdOBNSloK2rVcwT5fJSMQy7MJJkNkXLiQDuIbfVHaBEdoEAgZDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1ac8b37e6b9563dbc76c0cecbc5e7f55b19951ff30e574abd100aa3acbe06c3e","last_reissued_at":"2026-05-17T23:43:06.983723Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:43:06.983723Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1804.05519","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:43:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"agKCFdbqcOfsHPBdCe/g91eDuT7tDzvYsjml9kJOPpv+6pcuYPPv6MLo8VKmRf7coqMHF62t/veK+YxOVJ8IDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T16:31:56.113552Z"},"content_sha256":"37ba84d31eefbb55290c43ec372cca8ac796e6a4289b85f8d8494e669d7b214b","schema_version":"1.0","event_id":"sha256:37ba84d31eefbb55290c43ec372cca8ac796e6a4289b85f8d8494e669d7b214b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:DLELG7TLSVR5XR3MBTWLYXT7KW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Fabrication of high-temperature quasi-two-dimensional superconductors at the interface of a ferroelectric Ba$_{0.8}$Sr$_{0.2}$TiO$_{3}$ film and an insulating parent compound of La$_{2}$CuO$_{4}$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"Dmitrii P. Pavlov, Rinat F. Mamin, Rustem R. Zagidullin, Tadashi Adachi, Takayuki Kawamata, Viktor V. Kabanov, Vladimir M. Mukhortov, Yoji Koike","submitted_at":"2018-04-16T06:55:21Z","abstract_excerpt":"We report the first observation of superconductivity in heterostructure consisting of an insulating ferroelectric film (Ba$_{0.8}$Sr$_{0.2}$TiO$_3$) grown on an insulating parent compound of La$_2$CuO$_4$ with [001] orientation. The heterostructure was prepared by magnetron sputtering on a non-atomically-flat surface with inhomogeneities of the order of 1-2 nm. The measured superconducting transition temperature T$_c$ is about 30K. We have shown that superconductivity is confined near the interface region. Application of a weak magnetic field perpendicular to the interface leads to the appeara"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.05519","kind":"arxiv","version":3},"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":"2026-05-17T23:43:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"psFvkMmpRBrt4mmVN2Da/X9m+JdILhuPMuOicWNXwfx1lGQHMM++63F36SnEtcMOl75IvxMkSx+EPuCK3IGhBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T16:31:56.113901Z"},"content_sha256":"b30e93072bca2c0d47cf401ac63d7c6779f24cfa99fa3bffb341cae4c07181dd","schema_version":"1.0","event_id":"sha256:b30e93072bca2c0d47cf401ac63d7c6779f24cfa99fa3bffb341cae4c07181dd"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DLELG7TLSVR5XR3MBTWLYXT7KW/bundle.json","state_url":"https://pith.science/pith/DLELG7TLSVR5XR3MBTWLYXT7KW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DLELG7TLSVR5XR3MBTWLYXT7KW/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":"2026-06-03T16:31:56Z","links":{"resolver":"https://pith.science/pith/DLELG7TLSVR5XR3MBTWLYXT7KW","bundle":"https://pith.science/pith/DLELG7TLSVR5XR3MBTWLYXT7KW/bundle.json","state":"https://pith.science/pith/DLELG7TLSVR5XR3MBTWLYXT7KW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DLELG7TLSVR5XR3MBTWLYXT7KW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:DLELG7TLSVR5XR3MBTWLYXT7KW","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":"622cceffefdd651fbddaf9a28f54b899b8d4c1a0a905ea5ff69f12e12b656dc0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2018-04-16T06:55:21Z","title_canon_sha256":"88c331e36354f3ea84a4aea49da262f232aec3023e246d4599a32acdb90f3581"},"schema_version":"1.0","source":{"id":"1804.05519","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1804.05519","created_at":"2026-05-17T23:43:06Z"},{"alias_kind":"arxiv_version","alias_value":"1804.05519v3","created_at":"2026-05-17T23:43:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1804.05519","created_at":"2026-05-17T23:43:06Z"},{"alias_kind":"pith_short_12","alias_value":"DLELG7TLSVR5","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_16","alias_value":"DLELG7TLSVR5XR3M","created_at":"2026-05-18T12:32:19Z"},{"alias_kind":"pith_short_8","alias_value":"DLELG7TL","created_at":"2026-05-18T12:32:19Z"}],"graph_snapshots":[{"event_id":"sha256:b30e93072bca2c0d47cf401ac63d7c6779f24cfa99fa3bffb341cae4c07181dd","target":"graph","created_at":"2026-05-17T23:43:06Z","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 the first observation of superconductivity in heterostructure consisting of an insulating ferroelectric film (Ba$_{0.8}$Sr$_{0.2}$TiO$_3$) grown on an insulating parent compound of La$_2$CuO$_4$ with [001] orientation. The heterostructure was prepared by magnetron sputtering on a non-atomically-flat surface with inhomogeneities of the order of 1-2 nm. The measured superconducting transition temperature T$_c$ is about 30K. We have shown that superconductivity is confined near the interface region. Application of a weak magnetic field perpendicular to the interface leads to the appeara","authors_text":"Dmitrii P. Pavlov, Rinat F. Mamin, Rustem R. Zagidullin, Tadashi Adachi, Takayuki Kawamata, Viktor V. Kabanov, Vladimir M. Mukhortov, Yoji Koike","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2018-04-16T06:55:21Z","title":"Fabrication of high-temperature quasi-two-dimensional superconductors at the interface of a ferroelectric Ba$_{0.8}$Sr$_{0.2}$TiO$_{3}$ film and an insulating parent compound of La$_{2}$CuO$_{4}$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1804.05519","kind":"arxiv","version":3},"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":"sha256:37ba84d31eefbb55290c43ec372cca8ac796e6a4289b85f8d8494e669d7b214b","target":"record","created_at":"2026-05-17T23:43:06Z","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":"622cceffefdd651fbddaf9a28f54b899b8d4c1a0a905ea5ff69f12e12b656dc0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2018-04-16T06:55:21Z","title_canon_sha256":"88c331e36354f3ea84a4aea49da262f232aec3023e246d4599a32acdb90f3581"},"schema_version":"1.0","source":{"id":"1804.05519","kind":"arxiv","version":3}},"canonical_sha256":"1ac8b37e6b9563dbc76c0cecbc5e7f55b19951ff30e574abd100aa3acbe06c3e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1ac8b37e6b9563dbc76c0cecbc5e7f55b19951ff30e574abd100aa3acbe06c3e","first_computed_at":"2026-05-17T23:43:06.983723Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:43:06.983723Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"C/JS3CFOXra7HgaZrqK3/sak9lEErSU6DuCXdOBNSloK2rVcwT5fJSMQy7MJJkNkXLiQDuIbfVHaBEdoEAgZDw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:43:06.984254Z","signed_message":"canonical_sha256_bytes"},"source_id":"1804.05519","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:37ba84d31eefbb55290c43ec372cca8ac796e6a4289b85f8d8494e669d7b214b","sha256:b30e93072bca2c0d47cf401ac63d7c6779f24cfa99fa3bffb341cae4c07181dd"],"state_sha256":"39a99911a6b98499038baed720d592281923a16be213eec09db78ea7ca107840"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"x7AIYurWfnQL79d25/WGRDhfFdEW+FEelIxuBT/CI/jmQbpaXFXuYf463fm+85tuh0lBKrxJKNbJEWLiegn9AQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T16:31:56.115989Z","bundle_sha256":"c2ccc9c8c3758a49f6f1da5d67d337943697c5c24a7613aa74de840e3736e80b"}}