Berlin 2015 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 14: Surface Magnetism – Skyrmions (jointly with MA, O)

TT 14.8: Talk

Monday, March 16, 2015, 11:30–11:45, EB 301

Spin dynamics of spin-orbit coupled dimers on Pt(111) — •Manuel dos Santos Dias and Samir Lounis — Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, D-52425 Jülich, Germany

The interaction between two magnetic adatoms becomes anisotropic in the presence of strong spin-orbit coupling (SOC). The broken inversion symmetry at the surface leads in particular to the Dzyaloshinksii-Moriya interaction, enabling chiral magnetic ground states. We study the impact of this interaction on the spin dynamics of magnetic dimers (e.g. Fe) on the Pt(111) surface, in connection to possible inelastic scanning tunneling spectroscopy (ISTS) experiments [1]. We employ our recently developed time-dependent density functional theory including SOC, based on the Korringa-Kohn-Rostoker Green function approach. An extension of our theoretical ISTS method [2] to incorporate SOC is in progress.
Work funded by the HGF-YIG Programme FunSiLab - Functional Nanoscale Structure Probe and Simulation Laboratory (VH-NG-717).
[1] A. A. Khajetoorians et al., Phys. Rev. Lett. 111, 157204 (2013)
[2] B. Schweflinghaus et al., Phys. Rev. B 89, 235439 (2014)