10.26165/JUELICH-DATA/X4WIDYRüßmann, PhilippPhilippRüßmann0000-0002-6196-2700PGI-1 / IAS-1Tcakaev, AbdulAbdulTcakaevUniversity of WürzburgZabolotnyy, Volodymyr B.Volodymyr B.ZabolotnyyUniversity of WürzburgFornari, Celso I.Celso I.FornariUniversity of WürzburgPeixoto, Thiago R. F.Thiago R. F.PeixotoUniversity of WürzburgStier, FabianFabianStierUniversity of WürzburgDettbarn, MichaelMichaelDettbarnUniversity of WürzburgKagerer, PhilippPhilippKagererUniversity of WürzburgWeschke, EugenEugenWeschkeHelmholtz-Zentrum Berlin für Materialien und EnergieSchierle, EnricoEnricoSchierleHelmholtz-Zentrum Berlin für Materialien und EnergieBencok, PeterPeterBencokDiamond Light SourceRappl, Paulo H. O.Paulo H. O.RapplInstituto Nacional de Pesquisas Espaciais Sao PauloAbramof, EduardoEduardoAbramofInstituto Nacional de Pesquisas Espaciais Sao PauloBentmann, HendrikHendrikBentmannUniversity of WürzburgGoering, EberhardEberhardGoeringMPI StuttgartReinert, FriedrichFriedrichReinertUniversity of WürzburgHinkov, VladimirVladimirHinkovUniversity of WürzburgReplication Data for: Incipient antiferromagnetism in the Eu-doped topological insulator Bi2Te3Jülich DATA2024PhysicsRüßmann, PhilippPhilippRüßmannPGI-1 / IAS-12024-04-292024-04-3010.24435/materialscloud:30-5z1.0CC0 WaiverRare earth ions typically exhibit larger magnetic moments than transition metal ions and thus promise the opening of a wider exchange gap in the Dirac surface states of topological insulators. Yet, in a recent photoemission study of Eu-doped Bi2Te3 films, the spectra remained gapless down to T=20K. Here, we scrutinize whether the conditions for a substantial gap formation in this system are present by combining spectroscopic and bulk characterization methods with theoretical calculations. For all studied Eu doping concentrations, our atomic multiplet analysis of the M4,5 x-ray absorption and magnetic circular dichroism spectra reveals a Eu2+ valence and confirms a large magnetic moment, consistent with a 4f7 8S7/2 ground state. At temperatures below 10K, bulk magnetometry indicates the onset of antiferromagnetic (AFM) ordering. This is in good agreement with density functional theory, which predicts AFM interactions between the Eu impurities. Our results support the notion that antiferromagnetism can coexist with topological surface states in rare-earth doped Bi2Te3 and call for spectroscopic studies in the kelvin range to look for novel quantum phenomena such as the quantum anomalous Hall effect.