Regensburg 2019 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 44: Poster Tuesday: Spins and Magnetism

O 44.2: Poster

Dienstag, 2. April 2019, 18:00–20:00, Poster D

Hyperfine fields of magnetic adatoms on MgO/Ag(001) — •Sufyan Shehada, Manuel dos Santos Dias, Filipe Souza Mendes Guimarães, and Samir Lounis — Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich & JARA, 52425 Jülich, Germany

The hyperfine interaction couples the atomic nucleus to the surrounding electrons. Nuclear spin states tend to have a very long lifetime, and hold great promise as building blocks for quantum computers. Recently, the hyperfine splitting of the electron spin resonance peak was experimentally detected for Fe and Ti adatoms on MgO/Ag(001) [1]. In this contribution, we report on first-principles calculations of the hyperfine field [2] for a series of magnetic adatoms both on Ag(001) and on MgO/Ag(001) surfaces. We analyze the trends with respect to the type of adatom and its local surface environment, and explore the connection to the stability of the electronic spin states.
This work was supported by the Palestinian-German Science Bridge BMBF program and the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (ERC-consolidator Grant No. 681405-DYNASORE).
[1] P. Willke et al., Science 362, 336–339 (2018)
[2] S. Blügel et al., Phys. Rev. B 35, 3271 (1987)

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