{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:EZLHIJ6EBG6WPZBGFK7TEOWUSS","short_pith_number":"pith:EZLHIJ6E","canonical_record":{"source":{"id":"1106.2820","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-06-14T20:30:54Z","cross_cats_sorted":[],"title_canon_sha256":"bb96fde092f1d4c19e842876ba25d35acf4874c651a3f94ff9cd78188506f2c6","abstract_canon_sha256":"85cc9302d62652b77f7f654de47884103eddbbd9ec66d664f55dcc2438559709"},"schema_version":"1.0"},"canonical_sha256":"26567427c409bd67e4262abf323ad494907f85cc2e903a039c1e93811ddc73fc","source":{"kind":"arxiv","id":"1106.2820","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1106.2820","created_at":"2026-05-18T03:35:41Z"},{"alias_kind":"arxiv_version","alias_value":"1106.2820v1","created_at":"2026-05-18T03:35:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1106.2820","created_at":"2026-05-18T03:35:41Z"},{"alias_kind":"pith_short_12","alias_value":"EZLHIJ6EBG6W","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_16","alias_value":"EZLHIJ6EBG6WPZBG","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_8","alias_value":"EZLHIJ6E","created_at":"2026-05-18T12:26:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:EZLHIJ6EBG6WPZBGFK7TEOWUSS","target":"record","payload":{"canonical_record":{"source":{"id":"1106.2820","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-06-14T20:30:54Z","cross_cats_sorted":[],"title_canon_sha256":"bb96fde092f1d4c19e842876ba25d35acf4874c651a3f94ff9cd78188506f2c6","abstract_canon_sha256":"85cc9302d62652b77f7f654de47884103eddbbd9ec66d664f55dcc2438559709"},"schema_version":"1.0"},"canonical_sha256":"26567427c409bd67e4262abf323ad494907f85cc2e903a039c1e93811ddc73fc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:35:41.418473Z","signature_b64":"e8u2aA56IAGkRy2zqujM8u1cfi7O5ybIIUUwMeMKpLxPxfS3xecJR1dVPEHXBvwmgraG2wPb1VOSuCuC87a2CA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"26567427c409bd67e4262abf323ad494907f85cc2e903a039c1e93811ddc73fc","last_reissued_at":"2026-05-18T03:35:41.417503Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:35:41.417503Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1106.2820","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":"2026-05-18T03:35:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2fI9tHMukDJcTlc7+NxeHhOYYSeVbfz1EXlrU6ex7AohpwHSp4NeHbbKpKPrylrr36Y9LC9Samx56YtbrYzOCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T03:49:56.345543Z"},"content_sha256":"79f0ad91fad1e25dd3e5e25a8a38de8612aa27b4a7d63b6305e892149d16b274","schema_version":"1.0","event_id":"sha256:79f0ad91fad1e25dd3e5e25a8a38de8612aa27b4a7d63b6305e892149d16b274"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:EZLHIJ6EBG6WPZBGFK7TEOWUSS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"First principles study of the influence of (110)-oriented strain on the ferroelectric properties of rutile TiO$_2$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"A. Gr\\\"unebohm, C. Ederer, P. Entel","submitted_at":"2011-06-14T20:30:54Z","abstract_excerpt":"We use first principles density functional theory to investigate the softening of polar phonon modes in rutile TiO$_2$ under tensile (110)-oriented strain. We show that the system becomes unstable against a ferroelectric distortion with polarization along (110) for experimentally accessible strain values. The resulting polarization, estimated from the Born effective charges, even exceeds the bulk polarization of BaTiO$_3$. Our calculations demonstrate the different strain dependence of polar modes polarized along (110) and (001) directions, and we discuss the possibility of strain engineering "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1106.2820","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":"2026-05-18T03:35:41Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vTr4waPBKMUIlCGm9Ct4kB2qWcTwAfmTEjg0yRrEq4vY2prtVgbCd2N3muj6M9/KF0i3wF5QQ+57X5OyvkXZAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T03:49:56.345899Z"},"content_sha256":"238a83022072b6c66e9ab7d9f9ed80b48e797016d3c69e23523a4738a4f7e65c","schema_version":"1.0","event_id":"sha256:238a83022072b6c66e9ab7d9f9ed80b48e797016d3c69e23523a4738a4f7e65c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EZLHIJ6EBG6WPZBGFK7TEOWUSS/bundle.json","state_url":"https://pith.science/pith/EZLHIJ6EBG6WPZBGFK7TEOWUSS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EZLHIJ6EBG6WPZBGFK7TEOWUSS/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":"2026-06-01T03:49:56Z","links":{"resolver":"https://pith.science/pith/EZLHIJ6EBG6WPZBGFK7TEOWUSS","bundle":"https://pith.science/pith/EZLHIJ6EBG6WPZBGFK7TEOWUSS/bundle.json","state":"https://pith.science/pith/EZLHIJ6EBG6WPZBGFK7TEOWUSS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EZLHIJ6EBG6WPZBGFK7TEOWUSS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:EZLHIJ6EBG6WPZBGFK7TEOWUSS","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":"85cc9302d62652b77f7f654de47884103eddbbd9ec66d664f55dcc2438559709","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-06-14T20:30:54Z","title_canon_sha256":"bb96fde092f1d4c19e842876ba25d35acf4874c651a3f94ff9cd78188506f2c6"},"schema_version":"1.0","source":{"id":"1106.2820","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1106.2820","created_at":"2026-05-18T03:35:41Z"},{"alias_kind":"arxiv_version","alias_value":"1106.2820v1","created_at":"2026-05-18T03:35:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1106.2820","created_at":"2026-05-18T03:35:41Z"},{"alias_kind":"pith_short_12","alias_value":"EZLHIJ6EBG6W","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_16","alias_value":"EZLHIJ6EBG6WPZBG","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_8","alias_value":"EZLHIJ6E","created_at":"2026-05-18T12:26:28Z"}],"graph_snapshots":[{"event_id":"sha256:238a83022072b6c66e9ab7d9f9ed80b48e797016d3c69e23523a4738a4f7e65c","target":"graph","created_at":"2026-05-18T03:35:41Z","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 use first principles density functional theory to investigate the softening of polar phonon modes in rutile TiO$_2$ under tensile (110)-oriented strain. We show that the system becomes unstable against a ferroelectric distortion with polarization along (110) for experimentally accessible strain values. The resulting polarization, estimated from the Born effective charges, even exceeds the bulk polarization of BaTiO$_3$. Our calculations demonstrate the different strain dependence of polar modes polarized along (110) and (001) directions, and we discuss the possibility of strain engineering ","authors_text":"A. Gr\\\"unebohm, C. Ederer, P. Entel","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-06-14T20:30:54Z","title":"First principles study of the influence of (110)-oriented strain on the ferroelectric properties of rutile TiO$_2$"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1106.2820","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":"sha256:79f0ad91fad1e25dd3e5e25a8a38de8612aa27b4a7d63b6305e892149d16b274","target":"record","created_at":"2026-05-18T03:35:41Z","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":"85cc9302d62652b77f7f654de47884103eddbbd9ec66d664f55dcc2438559709","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2011-06-14T20:30:54Z","title_canon_sha256":"bb96fde092f1d4c19e842876ba25d35acf4874c651a3f94ff9cd78188506f2c6"},"schema_version":"1.0","source":{"id":"1106.2820","kind":"arxiv","version":1}},"canonical_sha256":"26567427c409bd67e4262abf323ad494907f85cc2e903a039c1e93811ddc73fc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"26567427c409bd67e4262abf323ad494907f85cc2e903a039c1e93811ddc73fc","first_computed_at":"2026-05-18T03:35:41.417503Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:35:41.417503Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"e8u2aA56IAGkRy2zqujM8u1cfi7O5ybIIUUwMeMKpLxPxfS3xecJR1dVPEHXBvwmgraG2wPb1VOSuCuC87a2CA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:35:41.418473Z","signed_message":"canonical_sha256_bytes"},"source_id":"1106.2820","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:79f0ad91fad1e25dd3e5e25a8a38de8612aa27b4a7d63b6305e892149d16b274","sha256:238a83022072b6c66e9ab7d9f9ed80b48e797016d3c69e23523a4738a4f7e65c"],"state_sha256":"77ebaba6085f1c90e452ea8d4cedc51da8656a4171dd91a731d94374880a661e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"KOcZmlPS7at8+fO2earglPDWK69h9H3MswxUIx7GjLKLVA8lXPSVLUWH7Oup128/EdhpXh8VyEiH89BrsDyOAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T03:49:56.347992Z","bundle_sha256":"54e784173c879e57e515547c885a3b721d236713e0f22eb0559363e3941f6f2a"}}