Regensburg 2022 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 6: Nanostructures at Surfaces 1
O 6.3: Vortrag
Montag, 5. September 2022, 11:00–11:15, S052
Electronic and magnetic properties of an on-surface synthesized 2D metal organic framework — •Amina Kimouche1,2, Roberto Robles3, Noemi Contreras1, Daniel Ruiz1, and Aitor Mugarza1,4 — 1Institut Català de Nanociència i Nanotecnologia, Barcelona, Spain — 2Institut für Physik und Astronomie, Universität Potsdam, Potsdam, Germany — 3Centro de Fisica de Materiales CFM/MPC (CSIC-UPV/EHU), Donostia-San Sebastián, Spain — 4ICREA Institució Catalana de Recerca i Estudis Avançats, Barcelona, Spain
2D MOFs constitute a new class of designer materials where the coexistence of Dirac electrons and flat bands can lead to rich physical phenomena and to the realization of quantum phases such as topological or quantum anomalous Hall insulators.
Following the concepts of coordination chemistry, based on a surface-assisted self-assembly of the metal and organic components, we have carried out synthesis of Iron-hexaiminotriphenylene (HITP) MOFs on Au(111) substrate and characterized their electronic structure using scanning tunnelling spectroscopy (STS). On the other hand, ab-initio calculations of the observed structures indicate the presence of strong ferromagnetic interactions that persist under the influence of the Au substrate, indicating that the interaction with the Au substrate stabilizes even further the FM state on Fe3(HITP)2. We relate such strong magnetic interactions to the formation of a radical spin at the ligand that mediate the inter-ionic interactions.