Dresden 2017 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 66: Graphene: Electronic Properties, Structure and Substrate Interaction I (joint session DY, DS, HL, MA, O, TT, organized by O)

TT 66.10: Vortrag

Donnerstag, 23. März 2017, 12:45–13:00, WIL A317

Magnetism in graphene induced by transition metal and rare earth atomic layers — •Vasile Caciuc, Nicolae Atodiresei, and Stefan Blügel — Peter Grünberg Institut (PGI-1) and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, Germany

On the Ir(111) surface graphene is physisorbed with a local chemical modulation [1] whose structural and electronic properties can be engineered via atomic intercalation [2,3,4] or molecular adsorption [5,6]. In particular, our ab initio density functional theory (DFT) simulations performed for 3d transition metal (TM) atoms such as Co [3] and Fe [4] intercalated at the interface between graphene and Ir(111) clearly demonstrated that the graphene layer exhibits a spin-split electronic structure. On the other hand, the strong hybridization between the π electronic states of graphene and the d ones of the TM monolayer significantly changes the magnetic properties of the intercalated atoms. Moreover, we investigated if this physical picture remains valid also in the case of the rare earth (RE) atoms with spatially localized magnetic moments such as 4f Eu intercalated between graphene and the Ni(111) surface.
This work is supported by DFG through SFB 1238 (Project C01).

[1] C. Busse et al., Phys. Rev. Lett. 107, 036101 (2011).

[2] W. Jolie et al., Phys. Rev. B 89, 155435 (2014).

[3] R. Decker et al., Phys. Rev. B 87, 041403(R) (2013).

[4] R. Decker et al., J. of Phys.: Cond. Matter. 26, 394004 (2014).

[5] R. Brede et al., Nature Nanotech. 9, 1018 (2014).

[6] F. Huttmann et al., Phys. Rev. Lett. 115, 236101 (2015).