SKM 2023 – scientific programme
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O: Fachverband Oberflächenphysik
O 7: Spins on Surfaces at the Atomic Scale I
O 7.8: Talk
Monday, March 27, 2023, 12:30–12:45, REC C 213
Controlling the Spin States of iron porphyrin on Au(111) — •Xiangzhi Meng1, Jenny Möller2, Masoud Mansouri3,4, Daniel Sánchez-Portal3,4, Aran Garcia-Lekue3,5, Alexander Weismann1, Chao Li1, Rainer Herges2, and Richard Berndt1 — 1Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität, 24098 Kiel, Germany — 2Otto-Diels-Institut für Organische Chemie, Christian-Albrechts-Universität, 24098 Kiel, Germany — 3Donostia International Physics Center (DIPC), 20018 Donostia-San Sebastián, Spain — 4Centro de Física de Materiales CSIC-UPV/EHU, 20018 Donostia-San Sebastián, Spain; — 5Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain
Spin-flip excitations of FeTBrPP molecules on Au(111) are investigated with a low-temperature scanning tunnelling microscope under ultrahigh vacuum condition. The molecules show two distinct adsorption configurations that exhibit different magnetic anisotropy energies. Density functional theory calculations show that the different structures and excitation energies reflect unlike occupations of the Fe 3d levels. We demonstrate that the magnetic anisotropy energy can be well controlled by adjusting the adsorption site, the orientation, or the tip-molecule distance.