Dresden 2020 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 110: Surface Magnetism I (joint session O/MA)

O 110.11: Vortrag

Donnerstag, 19. März 2020, 17:30–17:45, WIL A317

Magnetism of valence electrons in lanthanide atoms on metallic substrates and lanthanide thin films — •Daria Sostina1,2, Aparajita Singha1,2, Christoph Wolf1,2, Safa Ahmed1,2, Denis Krylov1,2, Pierluigi Gargiani3, Alessandro Barla4, Woo-suk Noh5, Marina Pivetta6, Stefano Rusponi6, Harald Brune6, Andreas Heinrich1,2, and Fabio Donati1,21Center for Quantum Nanoscience, Institute for Basic Science (IBS), Seoul, Republic of Korea — 2Department of Physics, Ewha Womans University, Seoul, Republic of Korea — 3ALBA Synchrotron Light Source, Cerdanyola del Vallès, Catalonia, Spain — 4Istituto di Struttura della Materia (ISM), Consiglio Nazionale delle Ricerche (CNR), Trieste, Italy — 5Pohang University of Science and Technology, Pohang, Republic of Korea — 6Institute of Physics, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland

Valence electrons in rare earth single atoms play a fundamental role in determining their magnetic stability and energy level structure [Phys. Rev. Lett. 121, 027201 (2018)]. Here, we investigate the occupation and magnetic moments of 5d and 6p electrons of Gd in the metallic state using X-ray magnetic circular dichroism. We observe charge transfer to occur when Gd atoms and clusters are deposited on Ag(100) surface and negligible occupation of Gd 5d orbital. Additional measurements performed on Gd films and related comparison with density functional theory allow us to understand the contribution of electron-electron correlations and hybridization of the Gd 5d orbitals to the magnetism of rare earths atomic-scale structures.

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