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Here, via europium doping, single spin\u2010polarized bands are generated in monolayer graphene supported by the Co(0001) surface. The doping is controlled by Eu positioning, allowing for the formation of a \u2010valley localized single spin\u2010polarized low\u2010dispersive parabolic band close to the Fermi energy when Eu is on top, and of a <jats:italic>\u03c0<\/jats:italic>* flat band with single spin\u00a0character when Eu is intercalated underneath graphene. In the latter case, Eu also induces a bandgap opening at the Dirac point while the Eu 4f states act as a spin filter, splitting the <jats:italic>\u03c0<\/jats:italic> band into two spin\u2010polarized branches. The generation of flat bands with single spin character, as revealed by the spin\u2010 and angle\u2010resolved photoemission spectroscopy (ARPES) experiments, complemented by density functional theory (DFT) calculations, opens up new pathways toward the realization of spintronic devices exploiting such novel exotic electronic and magnetic states.<\/jats:p>","DOI":"10.1002\/adma.202301441","type":"journal-article","created":{"date-parts":[[2023,4,10]],"date-time":"2023-04-10T09:55:33Z","timestamp":1681120533000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":21,"title":["Inducing Single Spin\u2010Polarized Flat Bands in Monolayer Graphene"],"prefix":"10.1002","volume":"35","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9525-3980","authenticated-orcid":false,"given":"Matteo","family":"Jugovac","sequence":"first","affiliation":[{"name":"Elettra \u2013 Sincrotrone Trieste  S.S. 14 \u2013 km 163.5, Basovizza 34149 Trieste Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6408-3541","authenticated-orcid":false,"given":"Iulia","family":"Cojocariu","sequence":"additional","affiliation":[{"name":"Elettra \u2013 Sincrotrone Trieste  S.S. 14 \u2013 km 163.5, Basovizza 34149 Trieste Italy"},{"name":"Peter Gr\u00fcnberg Institute (PGI\u20106) Forschungszentrum J\u00fclich GmbH  52425 J\u00fclich Germany"},{"name":"Dipartimento di Fisica Universit\u00e0 degli studi di Trieste  Via A. 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