SKM 2021 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 1: Surface Magnetism (joint session MA/O)

MA 1.7: Vortrag

Montag, 27. September 2021, 11:45–12:00, H5

Interplay of magnetic states and hyperfine fields of iron dimers on MgO(001) — •SUFYAN SHEHADA^1,2, Manuel dos Santos Dias¹, Muayad Abusaa³, and Samir Lounis^1,4 — ¹Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich & JARA, 52425 Jülich, Germany — ²Department of Physics, RWTH Aachen University, 52056 Aachen, Germany — ³Department of Physics, Arab American University, Jenin, Palestine — ⁴Faculty of Physics, University of Duisburg-Essen, 47053 Duisburg, Germany

Individual nuclear spin states can have very long lifetimes and could be useful as qubits. Progress in this direction was achieved on MgO/Ag(001) via detection of the hyperfine interaction (HFI) of Fe, Ti and Cu adatoms using scanning tunneling microscopy (STM) [1,2]. Previously, we systematically quantified from first-principles the HFI for the whole series of 3d transition adatoms (Sc*Cu) deposited on various ultra-thin insulators, establishing the trends of the computed HFI with respect to the filling of the magnetic s and d-orbitals of the adatoms and on the bonding with the substrate [3]. Here we take one step further by investigating the impact of the magnetic coupling between the dimer atoms on the HFI of Fe dimers on MgO(001) and its dependence on where the Fe atoms are located on the surface.

–Work funded by the Palestinian German Science Bridge (BMBF–01DH16027) and Horizon 2020–ERC (CoG 681405–DYNASORE).

[1] Willke et al., Science 362, 336 (2018); [2] Yang et al., Nat. Nano. 13, 1120 (2018); [3] Shehada et al., Npj Comput. Mater. 7, 87 (2021).