SurfaceScience21 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 31: Mini-Symposium: Manipulation and control of spins on functional surfaces I

O 31.5: Vortrag

Dienstag, 2. März 2021, 12:00–12:15, R2

Hyperfine fields of magnetic adatoms on ultrathin insulating films — •SUFYAN SHEHADA^1,2, Manuel dos Santos Dias¹, Filipe Souza Mendes Guimarães¹, 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. Promising steps in this direction were realized on MgO/Ag(001) via STM detection of the hyperfine interaction (HFI) of Fe and Ti adatoms [1] and the electrical control of the nuclear polarization of Cu adatoms [2]. Here, we report on systematic first-principles calculations of the HFI for 3d adatoms (Sc–Cu) atop ultra-thin insulators (MgO, NaF, NaCl, h–BN and Cu₂N) [3]. We analyze the trends and the dependence of the computed HFI on the filling of the magnetic s and d-orbitals of the adatoms and on bonding type and strength with the substrate. Finally, we identify promising candidates for future experimental investigations with scanning probe techniques.

–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. Nanotechnol. 13, 1120 (2018); [3] Shehada et al. ArXiv:2012.11639.