SurfaceScience21 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 68: Poster Session V: Poster to Mini-Symposium: Manipulation and control of spins on functional surfaces I
O 68.7: Poster
Mittwoch, 3. März 2021, 10:30–12:30, P
Hyperfine fields of magnetic adatoms on ultrathin insulating films — •SUFYAN SHEHADA1,2, Manuel dos Santos Dias1, Filipe Souza Mendes Guimarães1, Muayad Abusaa3, and Samir Lounis1,4 — 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.