Berlin 2024 – scientific programme

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O: Fachverband Oberflächenphysik

O 92: Nanostructures at Surfaces II

O 92.6: Talk

Thursday, March 21, 2024, 16:15–16:30, MA 042

Tailoring the ferromagnetic surface potential landscape by a templating two-dimensional metal-organic porous network — •Lu Lyu, Martin Anstett, Ka Man Yu, Azadeh Kadkhodazadeh, Martin Aeschlimann, and Benjamin Stadtmüller — Department of Physics and Research Center OPTIMAS, Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau, Erwin-Schrödinger-Straße 46, 67663 Kaiserslautern, Germany.

Two-dimensional metal-organic porous networks (2D-MOPNs) have emerged as versatile nanoarchitectures for tailoring surface electronic and magnetic properties on noble metals. In this context, we demonstrate the manipulation of the potential landscape of a ferromagnetic surface using a 2D-MOPN structure. As a model surface, we use ultrathin cobalt (Co) films grown on Au(111) which exhibit well-ordered triangular dislocation loops. On this ferromagnetic surface, 2,4,6-tris(4-pyridyl)-1,3,5triazine (T4PT) molecules can be coordinated with the surface Co atoms, forming a large-scale Co-T4PT porous network. The periodicity of the network acts as a template for the ferromagnetic surface potential and guides the subsequent growth of isolated C60 molecules on the network. For larger submonolayer coverage, the structure of the molecular film is further influenced by the intermolecular interactions between C60 molecules. Our findings underline the potential of 2D-MOPN to template the electronic and spin properties of molecular films on magnetic surfaces.

Keywords: Two-dimensional metal-organic porous network; Ferromagnetic Co film; Co-T4PT porous network; C60 molecule; Ferromagnetic surface potential landscape