{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2013:74MUEKGNAE2ZE3KHRIM7S3EBHL","short_pith_number":"pith:74MUEKGN","schema_version":"1.0","canonical_sha256":"ff194228cd0135926d478a19f96c813ae4d73eee13bc74a1e2cc65909f40c67d","source":{"kind":"arxiv","id":"1312.2042","version":1},"attestation_state":"computed","paper":{"title":"Hyperferroelectrics: proper ferroelectrics with persistent polarization","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"David Vanderbilt, Karin M. Rabe, Kevin F. Garrity","submitted_at":"2013-12-07T00:16:37Z","abstract_excerpt":"All known proper ferroelectrics are unable to polarize normal to a surface or interface if the resulting depolarization field is unscreened, but there is no fundamental principle that enforces this behavior. In this work, we introduce hyperferroelectrics, a new class of proper ferroelectrics which polarize even when the depolarization field is unscreened, this condition being equivalent to instability of a longitudinal optic mode in addition to the transverse-optic-mode instability characteristic of proper ferroelectrics. We use first principles calculations to show that several recently disco"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1312.2042","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2013-12-07T00:16:37Z","cross_cats_sorted":[],"title_canon_sha256":"eecbfe7522224a75b5b0f9b74db1db5cea3a3d426347f513f1c39b6ea4491c61","abstract_canon_sha256":"853413abd0f851c459956371f1856feb4d9bdae8ac74ff0ff73223862a3b1473"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:55:13.123024Z","signature_b64":"/+mOHWX4PwE3JXkO4n0GbVR1yPaMVA8a1Nt2+jpZ3DW3BY0NXpzMyHkEU/2YJFF8ixFQSrp7jUuBlz0xTODECg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ff194228cd0135926d478a19f96c813ae4d73eee13bc74a1e2cc65909f40c67d","last_reissued_at":"2026-05-18T02:55:13.122554Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:55:13.122554Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Hyperferroelectrics: proper ferroelectrics with persistent polarization","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"David Vanderbilt, Karin M. Rabe, Kevin F. Garrity","submitted_at":"2013-12-07T00:16:37Z","abstract_excerpt":"All known proper ferroelectrics are unable to polarize normal to a surface or interface if the resulting depolarization field is unscreened, but there is no fundamental principle that enforces this behavior. In this work, we introduce hyperferroelectrics, a new class of proper ferroelectrics which polarize even when the depolarization field is unscreened, this condition being equivalent to instability of a longitudinal optic mode in addition to the transverse-optic-mode instability characteristic of proper ferroelectrics. We use first principles calculations to show that several recently disco"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1312.2042","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1312.2042","created_at":"2026-05-18T02:55:13.122640+00:00"},{"alias_kind":"arxiv_version","alias_value":"1312.2042v1","created_at":"2026-05-18T02:55:13.122640+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1312.2042","created_at":"2026-05-18T02:55:13.122640+00:00"},{"alias_kind":"pith_short_12","alias_value":"74MUEKGNAE2Z","created_at":"2026-05-18T12:27:36.564083+00:00"},{"alias_kind":"pith_short_16","alias_value":"74MUEKGNAE2ZE3KH","created_at":"2026-05-18T12:27:36.564083+00:00"},{"alias_kind":"pith_short_8","alias_value":"74MUEKGN","created_at":"2026-05-18T12:27:36.564083+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/74MUEKGNAE2ZE3KHRIM7S3EBHL","json":"https://pith.science/pith/74MUEKGNAE2ZE3KHRIM7S3EBHL.json","graph_json":"https://pith.science/api/pith-number/74MUEKGNAE2ZE3KHRIM7S3EBHL/graph.json","events_json":"https://pith.science/api/pith-number/74MUEKGNAE2ZE3KHRIM7S3EBHL/events.json","paper":"https://pith.science/paper/74MUEKGN"},"agent_actions":{"view_html":"https://pith.science/pith/74MUEKGNAE2ZE3KHRIM7S3EBHL","download_json":"https://pith.science/pith/74MUEKGNAE2ZE3KHRIM7S3EBHL.json","view_paper":"https://pith.science/paper/74MUEKGN","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1312.2042&json=true","fetch_graph":"https://pith.science/api/pith-number/74MUEKGNAE2ZE3KHRIM7S3EBHL/graph.json","fetch_events":"https://pith.science/api/pith-number/74MUEKGNAE2ZE3KHRIM7S3EBHL/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/74MUEKGNAE2ZE3KHRIM7S3EBHL/action/timestamp_anchor","attest_storage":"https://pith.science/pith/74MUEKGNAE2ZE3KHRIM7S3EBHL/action/storage_attestation","attest_author":"https://pith.science/pith/74MUEKGNAE2ZE3KHRIM7S3EBHL/action/author_attestation","sign_citation":"https://pith.science/pith/74MUEKGNAE2ZE3KHRIM7S3EBHL/action/citation_signature","submit_replication":"https://pith.science/pith/74MUEKGNAE2ZE3KHRIM7S3EBHL/action/replication_record"}},"created_at":"2026-05-18T02:55:13.122640+00:00","updated_at":"2026-05-18T02:55:13.122640+00:00"}