Regensburg 2019 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 30: Surface Magnetism (joint session O/MA)

O 30.1: Vortrag

Dienstag, 2. April 2019, 10:30–10:45, H37

Unoccupied surface and interface states in thin film of Pd deposited on Fe/Ir(111) surface — •Mohammed Bouhassoune, Imara Lima Fernandes, Stefan Blügel, and Samir Lounis — Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, D-52425 Jülich, Germany

Pd layer deposited on Fe/Ir(111) substrate has been recently subject to intensive investigations since it hosts small swirling spin-textures named skyrmions that have potential interest in spintronic devices as magnetic bits for information technology. To manipulate and stabilize such non-collinear magetic objects it is of important demand to conduct a quantitaive study of their electronic structure. Here we aim to investigate the unoccupied states in Pd thin layers deposited on Fe/Ir(111) substrate using density functional theory. These unoccupied states are behind the large spin-mixing magnetoresisatnce (XMR) signature measured using non spin-polarized scanning tunnelling microscopy (STM) [1,2]. By analysing the electronic band structure we demonstrate the emergence of surface and interface states after deposition of Pd monolayers, which are very sensitive to the large spin-orbit coupling of Ir surface giving rise to the XMR signal.

This work is supported by the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (ERC-consolidator Grant No. 681405 DYNASORE).

[1] D. M. Crum, M. Bouhassoune, J. Bouaziz, B. Schweflinghaus, S. Blügel, and S. Lounis, Nat. Commun. 6 8541 (2015)

[2] C. Hanneken et al, Nat, Nanotech. 10, 1039 (2015)

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