{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:JD63GMTMTXXRG43XS3XT2LU5ZJ","short_pith_number":"pith:JD63GMTM","canonical_record":{"source":{"id":"1211.5215","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-11-22T07:00:25Z","cross_cats_sorted":[],"title_canon_sha256":"88dec70a4471f733bb0f448a161613ceb5d1fdd81d1a3bbc17a09bd45da3253a","abstract_canon_sha256":"b59c45441f60cdda88cfe2b06c09793cf8e1d1b7d1d7661da51bcf37cf6c3395"},"schema_version":"1.0"},"canonical_sha256":"48fdb3326c9def13737796ef3d2e9dca6023a97eae614e35d8919620cf4d1f9e","source":{"kind":"arxiv","id":"1211.5215","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1211.5215","created_at":"2026-05-18T01:53:01Z"},{"alias_kind":"arxiv_version","alias_value":"1211.5215v1","created_at":"2026-05-18T01:53:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1211.5215","created_at":"2026-05-18T01:53:01Z"},{"alias_kind":"pith_short_12","alias_value":"JD63GMTMTXXR","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_16","alias_value":"JD63GMTMTXXRG43X","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_8","alias_value":"JD63GMTM","created_at":"2026-05-18T12:27:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:JD63GMTMTXXRG43XS3XT2LU5ZJ","target":"record","payload":{"canonical_record":{"source":{"id":"1211.5215","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-11-22T07:00:25Z","cross_cats_sorted":[],"title_canon_sha256":"88dec70a4471f733bb0f448a161613ceb5d1fdd81d1a3bbc17a09bd45da3253a","abstract_canon_sha256":"b59c45441f60cdda88cfe2b06c09793cf8e1d1b7d1d7661da51bcf37cf6c3395"},"schema_version":"1.0"},"canonical_sha256":"48fdb3326c9def13737796ef3d2e9dca6023a97eae614e35d8919620cf4d1f9e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:53:01.643515Z","signature_b64":"suD/D6+lkH8cP1MZrnBg56y9IzZKQIeCixucLQY2x2WMVy5AohTEJ67xXqJMsaMIygveq/K8F9PVygLdNcFfBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"48fdb3326c9def13737796ef3d2e9dca6023a97eae614e35d8919620cf4d1f9e","last_reissued_at":"2026-05-18T01:53:01.642731Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:53:01.642731Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1211.5215","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":"2026-05-18T01:53:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"u0qUifi1RPRwU/SPGWxrR3AqRHdMWMAdGGxkN0hqBNaxkgWhCQtzhX42LACuxtb8GK62cy3EzJf8T2r3sR3SAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T14:28:26.849981Z"},"content_sha256":"d244745ed7f79d9fd4809d65eccd51d8a7b18b672974bbf2080cca78cfb4ece5","schema_version":"1.0","event_id":"sha256:d244745ed7f79d9fd4809d65eccd51d8a7b18b672974bbf2080cca78cfb4ece5"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:JD63GMTMTXXRG43XS3XT2LU5ZJ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Physical properties and band structure of reactive molecular beam epitaxy grown oxygen engineered HfO$_{2\\pm x}$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Erwin Hildebrandt, Jose Kurian, Lambert Alff","submitted_at":"2012-11-22T07:00:25Z","abstract_excerpt":"We have conducted a detailed thin film growth structure of oxygen engineered monoclinic HfO$_{2\\pm x}$ grown by reactive molecular beam epitaxy (MBE). The oxidation conditions induce a switching between ($\\bar{1}11$) and (002) texture of hafnium oxide. The band gap of oxygen deficient hafnia decreases with increasing amount of oxygen vacancies by more than 1 eV. For high oxygen vacancy concentrations, defect bands form inside the band gap that induce optical transitions and $p$-type conductivity. The resistivity changes by several orders of magnitude as a function of oxidation conditions. Oxyg"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.5215","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":"2026-05-18T01:53:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ml0W94boNnDT6+gUVKzTCW8TMmyhaqRcgzWWCDxEYC28erpdq4JjMjAMoPvxTeFIngZFeN9G7p63+FnHL2MnCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T14:28:26.850461Z"},"content_sha256":"4ee9566a20d7ab5bc00315ff4d2acc793f79cd8c21be0f825e7511d7c5ce81d6","schema_version":"1.0","event_id":"sha256:4ee9566a20d7ab5bc00315ff4d2acc793f79cd8c21be0f825e7511d7c5ce81d6"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/JD63GMTMTXXRG43XS3XT2LU5ZJ/bundle.json","state_url":"https://pith.science/pith/JD63GMTMTXXRG43XS3XT2LU5ZJ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/JD63GMTMTXXRG43XS3XT2LU5ZJ/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":"2026-05-31T14:28:26Z","links":{"resolver":"https://pith.science/pith/JD63GMTMTXXRG43XS3XT2LU5ZJ","bundle":"https://pith.science/pith/JD63GMTMTXXRG43XS3XT2LU5ZJ/bundle.json","state":"https://pith.science/pith/JD63GMTMTXXRG43XS3XT2LU5ZJ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/JD63GMTMTXXRG43XS3XT2LU5ZJ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:JD63GMTMTXXRG43XS3XT2LU5ZJ","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":"b59c45441f60cdda88cfe2b06c09793cf8e1d1b7d1d7661da51bcf37cf6c3395","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-11-22T07:00:25Z","title_canon_sha256":"88dec70a4471f733bb0f448a161613ceb5d1fdd81d1a3bbc17a09bd45da3253a"},"schema_version":"1.0","source":{"id":"1211.5215","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1211.5215","created_at":"2026-05-18T01:53:01Z"},{"alias_kind":"arxiv_version","alias_value":"1211.5215v1","created_at":"2026-05-18T01:53:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1211.5215","created_at":"2026-05-18T01:53:01Z"},{"alias_kind":"pith_short_12","alias_value":"JD63GMTMTXXR","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_16","alias_value":"JD63GMTMTXXRG43X","created_at":"2026-05-18T12:27:11Z"},{"alias_kind":"pith_short_8","alias_value":"JD63GMTM","created_at":"2026-05-18T12:27:11Z"}],"graph_snapshots":[{"event_id":"sha256:4ee9566a20d7ab5bc00315ff4d2acc793f79cd8c21be0f825e7511d7c5ce81d6","target":"graph","created_at":"2026-05-18T01:53:01Z","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 have conducted a detailed thin film growth structure of oxygen engineered monoclinic HfO$_{2\\pm x}$ grown by reactive molecular beam epitaxy (MBE). The oxidation conditions induce a switching between ($\\bar{1}11$) and (002) texture of hafnium oxide. The band gap of oxygen deficient hafnia decreases with increasing amount of oxygen vacancies by more than 1 eV. For high oxygen vacancy concentrations, defect bands form inside the band gap that induce optical transitions and $p$-type conductivity. The resistivity changes by several orders of magnitude as a function of oxidation conditions. Oxyg","authors_text":"Erwin Hildebrandt, Jose Kurian, Lambert Alff","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-11-22T07:00:25Z","title":"Physical properties and band structure of reactive molecular beam epitaxy grown oxygen engineered HfO$_{2\\pm x}$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.5215","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:d244745ed7f79d9fd4809d65eccd51d8a7b18b672974bbf2080cca78cfb4ece5","target":"record","created_at":"2026-05-18T01:53:01Z","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":"b59c45441f60cdda88cfe2b06c09793cf8e1d1b7d1d7661da51bcf37cf6c3395","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-11-22T07:00:25Z","title_canon_sha256":"88dec70a4471f733bb0f448a161613ceb5d1fdd81d1a3bbc17a09bd45da3253a"},"schema_version":"1.0","source":{"id":"1211.5215","kind":"arxiv","version":1}},"canonical_sha256":"48fdb3326c9def13737796ef3d2e9dca6023a97eae614e35d8919620cf4d1f9e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"48fdb3326c9def13737796ef3d2e9dca6023a97eae614e35d8919620cf4d1f9e","first_computed_at":"2026-05-18T01:53:01.642731Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:53:01.642731Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"suD/D6+lkH8cP1MZrnBg56y9IzZKQIeCixucLQY2x2WMVy5AohTEJ67xXqJMsaMIygveq/K8F9PVygLdNcFfBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:53:01.643515Z","signed_message":"canonical_sha256_bytes"},"source_id":"1211.5215","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d244745ed7f79d9fd4809d65eccd51d8a7b18b672974bbf2080cca78cfb4ece5","sha256:4ee9566a20d7ab5bc00315ff4d2acc793f79cd8c21be0f825e7511d7c5ce81d6"],"state_sha256":"78b92b8095e37df574cde11378675d320b332e9f44945c4145eab1348573cb57"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NgK/bqNAB1COONOM/id9d2CUDsomQC17vh84iha5YaQ0KnS4Chio1KNph2iKR6ajHF1JapbIwfgVSOhXlTxeAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T14:28:26.853747Z","bundle_sha256":"cb901f60ceb3a76207024923000d7dcae84e62a0613e48e10933de5ac3e2d88d"}}