{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:QWHA7BQ3TSQ56F73BIUURAIUZJ","short_pith_number":"pith:QWHA7BQ3","canonical_record":{"source":{"id":"1904.01213","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-04-02T04:49:21Z","cross_cats_sorted":[],"title_canon_sha256":"a480cd4b54e7648ef18d2d58bdc710973b1dc517b51efb594de3d1eac4cda1f5","abstract_canon_sha256":"0bd8600d9b457ff9700b80a340674c9a176fb97375f4ad883d9ad3a634902ccb"},"schema_version":"1.0"},"canonical_sha256":"858e0f861b9ca1df17fb0a29488114ca70d21913dac1656acb32554acbb4460a","source":{"kind":"arxiv","id":"1904.01213","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.01213","created_at":"2026-05-17T23:42:15Z"},{"alias_kind":"arxiv_version","alias_value":"1904.01213v1","created_at":"2026-05-17T23:42:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.01213","created_at":"2026-05-17T23:42:15Z"},{"alias_kind":"pith_short_12","alias_value":"QWHA7BQ3TSQ5","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_16","alias_value":"QWHA7BQ3TSQ56F73","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_8","alias_value":"QWHA7BQ3","created_at":"2026-05-18T12:33:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:QWHA7BQ3TSQ56F73BIUURAIUZJ","target":"record","payload":{"canonical_record":{"source":{"id":"1904.01213","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-04-02T04:49:21Z","cross_cats_sorted":[],"title_canon_sha256":"a480cd4b54e7648ef18d2d58bdc710973b1dc517b51efb594de3d1eac4cda1f5","abstract_canon_sha256":"0bd8600d9b457ff9700b80a340674c9a176fb97375f4ad883d9ad3a634902ccb"},"schema_version":"1.0"},"canonical_sha256":"858e0f861b9ca1df17fb0a29488114ca70d21913dac1656acb32554acbb4460a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:42:15.166790Z","signature_b64":"OkVm2MaPpadMyYjVIuKUV82X7kqxLP7l3qIPf09ZsbWRfITsy8cSy1bGXl8OukDDUh1ovK3f4OA1nNcNL8nXBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"858e0f861b9ca1df17fb0a29488114ca70d21913dac1656acb32554acbb4460a","last_reissued_at":"2026-05-17T23:42:15.166160Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:42:15.166160Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1904.01213","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":"2026-05-17T23:42:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Mmw9bw3kxL2Tgm89NVQYrM5KZaViyzHDNd+TpYaMFnx9jRq3oCG+3n+aPAgpiM10otfJgujwHkTZhhv+NYWqCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T02:43:08.443489Z"},"content_sha256":"f245a7eacb795f0649b7edaa4c8ac71256eb02c3721a4feaf6787e0af38ee9d8","schema_version":"1.0","event_id":"sha256:f245a7eacb795f0649b7edaa4c8ac71256eb02c3721a4feaf6787e0af38ee9d8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:QWHA7BQ3TSQ56F73BIUURAIUZJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Causes of ferroelectricity in HfO$_{2}$-based thin films: An $\\textit{ab initio}$ perspective","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Mehmet Dogan, Nanbo Gong, Sohrab Ismail-Beigi, Tso-Ping Ma","submitted_at":"2019-04-02T04:49:21Z","abstract_excerpt":"We present a comprehensive first principles study of doped hafnia in order to understand the formation of the ferroelectric orthorhombic [001] grains. Assuming that tetragonal grains are present during the early stages of growth, matching plane analysis shows that tetragonal [100] grains can transform into orthorhombic [001] during thermal annealing, when they are laterally confined by other grains. We show that among 0%, 2% and %4 Si doping, 4% doping provides the best conditions for the tetragonal [100] to orthorhombic [001] transformation. This also holds for Al doping. We also show that fo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.01213","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":"2026-05-17T23:42:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Cjag4Md30NTq1IjfIe1k5ELuDS/08edm/EnIEARt/uEkNUkw8OC3ghSdzfDhKdmggT3eEETFWyI/3prYj6QVDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T02:43:08.444032Z"},"content_sha256":"cfa40346e7083c44e5e50952e5f5c8542dc39738d88d9c66e8d5bc8dec404f5c","schema_version":"1.0","event_id":"sha256:cfa40346e7083c44e5e50952e5f5c8542dc39738d88d9c66e8d5bc8dec404f5c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/QWHA7BQ3TSQ56F73BIUURAIUZJ/bundle.json","state_url":"https://pith.science/pith/QWHA7BQ3TSQ56F73BIUURAIUZJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/QWHA7BQ3TSQ56F73BIUURAIUZJ/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":"2026-06-05T02:43:08Z","links":{"resolver":"https://pith.science/pith/QWHA7BQ3TSQ56F73BIUURAIUZJ","bundle":"https://pith.science/pith/QWHA7BQ3TSQ56F73BIUURAIUZJ/bundle.json","state":"https://pith.science/pith/QWHA7BQ3TSQ56F73BIUURAIUZJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/QWHA7BQ3TSQ56F73BIUURAIUZJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:QWHA7BQ3TSQ56F73BIUURAIUZJ","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":"0bd8600d9b457ff9700b80a340674c9a176fb97375f4ad883d9ad3a634902ccb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-04-02T04:49:21Z","title_canon_sha256":"a480cd4b54e7648ef18d2d58bdc710973b1dc517b51efb594de3d1eac4cda1f5"},"schema_version":"1.0","source":{"id":"1904.01213","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.01213","created_at":"2026-05-17T23:42:15Z"},{"alias_kind":"arxiv_version","alias_value":"1904.01213v1","created_at":"2026-05-17T23:42:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.01213","created_at":"2026-05-17T23:42:15Z"},{"alias_kind":"pith_short_12","alias_value":"QWHA7BQ3TSQ5","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_16","alias_value":"QWHA7BQ3TSQ56F73","created_at":"2026-05-18T12:33:27Z"},{"alias_kind":"pith_short_8","alias_value":"QWHA7BQ3","created_at":"2026-05-18T12:33:27Z"}],"graph_snapshots":[{"event_id":"sha256:cfa40346e7083c44e5e50952e5f5c8542dc39738d88d9c66e8d5bc8dec404f5c","target":"graph","created_at":"2026-05-17T23:42:15Z","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 present a comprehensive first principles study of doped hafnia in order to understand the formation of the ferroelectric orthorhombic [001] grains. Assuming that tetragonal grains are present during the early stages of growth, matching plane analysis shows that tetragonal [100] grains can transform into orthorhombic [001] during thermal annealing, when they are laterally confined by other grains. We show that among 0%, 2% and %4 Si doping, 4% doping provides the best conditions for the tetragonal [100] to orthorhombic [001] transformation. This also holds for Al doping. We also show that fo","authors_text":"Mehmet Dogan, Nanbo Gong, Sohrab Ismail-Beigi, Tso-Ping Ma","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-04-02T04:49:21Z","title":"Causes of ferroelectricity in HfO$_{2}$-based thin films: An $\\textit{ab initio}$ perspective"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.01213","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:f245a7eacb795f0649b7edaa4c8ac71256eb02c3721a4feaf6787e0af38ee9d8","target":"record","created_at":"2026-05-17T23:42:15Z","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":"0bd8600d9b457ff9700b80a340674c9a176fb97375f4ad883d9ad3a634902ccb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2019-04-02T04:49:21Z","title_canon_sha256":"a480cd4b54e7648ef18d2d58bdc710973b1dc517b51efb594de3d1eac4cda1f5"},"schema_version":"1.0","source":{"id":"1904.01213","kind":"arxiv","version":1}},"canonical_sha256":"858e0f861b9ca1df17fb0a29488114ca70d21913dac1656acb32554acbb4460a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"858e0f861b9ca1df17fb0a29488114ca70d21913dac1656acb32554acbb4460a","first_computed_at":"2026-05-17T23:42:15.166160Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:42:15.166160Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"OkVm2MaPpadMyYjVIuKUV82X7kqxLP7l3qIPf09ZsbWRfITsy8cSy1bGXl8OukDDUh1ovK3f4OA1nNcNL8nXBg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:42:15.166790Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.01213","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f245a7eacb795f0649b7edaa4c8ac71256eb02c3721a4feaf6787e0af38ee9d8","sha256:cfa40346e7083c44e5e50952e5f5c8542dc39738d88d9c66e8d5bc8dec404f5c"],"state_sha256":"b99e2ad20b630ac177e45c75dfd119948e8c22855d64e693115974393d717308"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+EpfIr6tUpaIqf23Rca8e1SOJOe+zjkOUww6afphLmXEiCALXnK8Ajl4zAKhnUObpsQ/X2MhX0sW/V1Bwa19AA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T02:43:08.446728Z","bundle_sha256":"5d3536575ec77b57ac2a0a55045a8a917ec4d3cf8166616b8b18c092d4c37a38"}}