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Creating multiferroicity in two-dimensional (2D) van der Waals (vdW) platforms would add the elements of strong quantum confinement, enhanced quasiparticle excitations, and wide tunability to the capabilities of these systems. In this work, we constructed vdW heterostructures of ferromagnetic triiron gallium ditelluride (Fe\n                    <jats:sub>3<\/jats:sub>\n                    GaTe\n                    <jats:sub>2<\/jats:sub>\n                    ) and ferroelectric copper indium thiophosphate (CuInP\n                    <jats:sub>2<\/jats:sub>\n                    S\n                    <jats:sub>6<\/jats:sub>\n                    ) to integrate their respective orders. We observed strong interferroic coupling at room temperature by demonstrating ferroelectrically reconfigurable magnetic anisotropy of 2D Fe\n                    <jats:sub>3<\/jats:sub>\n                    GaTe\n                    <jats:sub>2<\/jats:sub>\n                    . The interferroic magnetoelectricity diminished with increasing Fe\n                    <jats:sub>3<\/jats:sub>\n                    GaTe\n                    <jats:sub>2<\/jats:sub>\n                    thickness, revealing the interfacial nature of heterostructure multiferroicity. Our discovery of all-vdW heterostructure multiferroicity opens the door to the artificial assembly of vdW layers for designer 2D multiferroics.\n                  <\/jats:p>","DOI":"10.1126\/science.adq0420","type":"journal-article","created":{"date-parts":[[2026,8,13]],"date-time":"2026-08-13T18:00:46Z","timestamp":1786644046000},"page":"714-718","update-policy":"https:\/\/doi.org\/10.34133\/aaas_crossmark","source":"Crossref","is-referenced-by-count":4,"title":["Room-temperature multiferroicity in all\u2013van der Waals heterostructures"],"prefix":"10.1126","volume":"393","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6611-1465","authenticated-orcid":true,"given":"Qinqin","family":"Wang","sequence":"first","affiliation":[{"name":"Department of Electrical and Computer Engineering and Quantum Technology Center, University of Maryland, College Park, MD, 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Gong Room-temperature multiferroicity in all-van der Waals heterostructures Zenodo (2026); https:\/\/doi.org\/10.5281\/zenodo.20112969."},{"key":"e_1_3_2_56_2","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevB.54.11169"},{"key":"e_1_3_2_57_2","doi-asserted-by":"publisher","DOI":"10.1021\/jp501237c"},{"key":"e_1_3_2_58_2","doi-asserted-by":"publisher","DOI":"10.1038\/s41586-018-0626-9"},{"key":"e_1_3_2_59_2","doi-asserted-by":"publisher","DOI":"10.1063\/1.5144032"},{"key":"e_1_3_2_60_2","doi-asserted-by":"publisher","DOI":"10.1021\/nl501209p"},{"key":"e_1_3_2_61_2","doi-asserted-by":"publisher","DOI":"10.1063\/5.0085128"},{"key":"e_1_3_2_62_2","doi-asserted-by":"publisher","DOI":"10.1002\/adma.201503115"}],"container-title":["Science"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.science.org\/doi\/pdf\/10.1126\/science.adq0420","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,8,13]],"date-time":"2026-08-13T18:01:38Z","timestamp":1786644098000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.science.org\/doi\/10.1126\/science.adq0420"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,8,13]]},"references-count":60,"journal-issue":{"issue":"6812","published-print":{"date-parts":[[2026,8,13]]}},"alternative-id":["10.1126\/science.adq0420"],"URL":"https:\/\/doi.org\/10.1126\/science.adq0420","relation":{},"ISSN":["0036-8075","1095-9203"],"issn-type":[{"value":"0036-8075","type":"print"},{"value":"1095-9203","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,8,13]]},"assertion":[{"value":"2024-04-24","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2025-06-21","order":1,"name":"revised","label":"Revised","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-06-18","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-08-13","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}