Regensburg 2025 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 30: Surface Magnetism
O 30.7: Vortrag
Dienstag, 18. März 2025, 12:15–12:30, H11
Graphene intercalated Eu on magnetic surfaces a DFT study — •Gustav Bihlmayer1, Polina M. Sheverdyaeva2, Matteo Jugovac3, Luisa Ferrari4, Frederico Mazzola5, Paolo Perna6, Nicolae Atodiresei1, and Stefan Blügel1 — 1Peter Grünberg Institute (PGI-1), Forschungszentrum Jülich, D-52425 Jülich — 2CNR-ISM, 34149 Trieste, Italy — 3Elettra Sincrotrone Trieste, 34149 Trieste, Italy — 4CNR-ISM, 00133 Roma, Italy — 5CNR-IOM, 34149 Trieste, Italy — 6IMDEA Nanociencia, Campus de Cantoblanco, 28049, Madrid, Spain
Europium can be intercalated between graphene and magnetic surfaces like Co(0001) or Ni(111) forming a √3 × √3 layer [1]. The doping of graphene can create a pronounced flat band at the Fermi level and the interaction of the 4f states with the π band of graphene leads to spin-selective hybridization and opening of the Dirac cone with interesting consequences for edge channels [2]. This system can be compared to Eu on-top of a graphene covered Co substrate, that changes the magnetic coupling between the lanthanide and the substrate [3] and modifies the graphene’s interaction with the 4f states. Further stacking combinations are possible and will be discussed [4].
We acknowledge funding from the FLAG-ERA grant SOgrapMEM and from CRC 1238 of the Deutsche Forschungsgemeinschaft.
[1] F. Huttmann et al., Phys. Rev. B 95, 075427 (2017) [2] P. M. Sheverdyaeva et al., Phys. Rev. Lett. 132, 266401 (2024) [3] M. Jugovac et al., Adv. Mater. 35, 2301441 (2023) [4] M. Jugovac et al., Carbon 230, 119666 (2024)
Keywords: Surface magnetism; Lanthanides; Graphene; Density functional theory