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Here, we demonstrate persistent spin and valley polarizations in a van der Waals heterostructure comprising bulk antiferromagnetic CrPS\n                    <jats:sub>4<\/jats:sub>\n                    and monolayer MoSe\n                    <jats:sub>2<\/jats:sub>\n                    , achieved via interfacial magnetic proximity effects. The 1L\u2010MoSe\n                    <jats:sub>2<\/jats:sub>\n                    \/bulk\u2010CrPS\n                    <jats:sub>4<\/jats:sub>\n                    heterostructure exhibits non\u2010volatile hysteresis in chiral photoluminescence (PL), directly linked to the antiferromagnetic ordering of bulk\u2010CrPS\n                    <jats:sub>4<\/jats:sub>\n                    . This helicity of PL persists at zero field, enabled by the spin\u2010polarized charge transfer from the K valley in the MoSe\n                    <jats:sub>2<\/jats:sub>\n                    monolayer to the conduction band of CrPS\n                    <jats:sub>4<\/jats:sub>\n                    , breaking the valley degeneracy without external stimuli. Remarkably, the PL helicity switches surprisingly at a magnetic field of \u223c 0.5 T, a 17\u2010fold smaller than the spin\u2010flip field of \u223c8.5 T in bulk CrPS\n                    <jats:sub>4<\/jats:sub>\n                    . Our work establishes bulk antiferromagnet\u2010based heterostructure as a robust platform for low\u2010energy, magnetically tunable quantum devices, bridging the gap between the transient valleytronic phenomena and practical non\u2010volatile applications.\n                  <\/jats:p>","DOI":"10.1002\/adma.202515464","type":"journal-article","created":{"date-parts":[[2025,12,27]],"date-time":"2025-12-27T09:51:27Z","timestamp":1766829087000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Proximity\u2010Driven Non\u2010Volatile Spin and Valley Control in a Van Der Waals Antiferromagnetic Heterostructure"],"prefix":"10.1002","volume":"38","author":[{"given":"Lili","family":"Hu","sequence":"first","affiliation":[{"name":"Beijing Academy of Quantum Information Sciences  Beijing P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shan","family":"Dong","sequence":"additional","affiliation":[{"name":"MOE Key Laboratory of Material Physics and Chemistry Under Extraordinary Conditions School of Physical Science and Technology Northwestern Polytechnical University  Xi'an P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuxin","family":"Zhai","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Low\u2010Dimensional Quantum Physics and Department of Physics Tsinghua University  Beijing P.R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yubin","family":"Wang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Low\u2010Dimensional Quantum Physics and Department of Physics Tsinghua University  Beijing P.R. 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China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"David","family":"Sedmidubsk\u00fd","sequence":"additional","affiliation":[{"name":"Department of Inorganic Chemistry University of Chemistry and Technology Prague  Prague Czech Republic"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zdenek","family":"Sofer","sequence":"additional","affiliation":[{"name":"Department of Inorganic Chemistry University of Chemistry and Technology Prague  Prague Czech Republic"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wenkai","family":"Lou","sequence":"additional","affiliation":[{"name":"Institute of Semiconductors Chinese Academy of Sciences  Beijing P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kai","family":"Chang","sequence":"additional","affiliation":[{"name":"Center for Quantum Matter School of Physics Zhejiang University Zhejiang P. R. 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