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Ferroelectric perovskite oxides such as BaTiO$_3$ and PbTiO$_3$ exhibit substantial polarization and stability, but have the disadvantage of excessively large band gaps. We use both density functional theory and dynamical mean field theory calculations to design a new class of Mott multiferroics--double perovskite oxides $A_2$VFeO$_6$ ($A$=Ba, Pb, etc). While neither perovskite $A$VO$_3$ nor $A$FeO$_3$ is ferroelectric, in the double perovskit"},"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":"1708.05506","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2017-08-18T04:19:45Z","cross_cats_sorted":[],"title_canon_sha256":"435793da57998994f39063943c8020c891a94e0cccea60e8aa4b07cd9d8731e6","abstract_canon_sha256":"17214284c34e31bf548dd194eb887c47e05fc1226fc910e4c5a647b0ee868533"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:37:49.886512Z","signature_b64":"BdrLCmP2enkR8XbrszjJZlMMUM2eKrH7YGCVKVBt5jXnxZizrhvlWErCcC5mKzVyEteuKeuhE3TBRRnlLx/NAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a733a3e5a347533c22b2bcd879c2b40341c9d29ea42034fdd8ea2969e1046606","last_reissued_at":"2026-05-18T00:37:49.885839Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:37:49.885839Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Design of new Mott multiferroics via complete charge transfer: promising candidates for bulk photovoltaics","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Andrew J. 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