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O: Fachverband Oberflächenphysik

O 36: Posters: Bio/organic Molecules on Surfaces, Graphene, Solid/liquid interfaces, Metal Substrates, Electronic Structure Theory

O 36.60: Poster

Dienstag, 1. April 2014, 18:30–22:00, P1

Bottom-up creation of metal-organic magnetic molecules based on cyclooctatetraene — •Hasmik Harutyunyan¹ and Daniel Wegner² — ¹Westfälische Wilhelms-Universirät Münster — ²Westfälische Wilhelms-Universirät Münster

Single molecule magnets (SMM) are metal-organic complexes where the spin is mostly carried by transition-metal atoms (3d or 4f), while the coupling is mediated by organic ligands. Due to their large size it is very difficult to deposit SMMs onto a surface under ultrahigh vacuum conditions. An alternative way is the creation of magnetic molecules in a bottom-up fashion. Here we show that single cyclooctatetraene (COT) molecules can be connected to isolated 3d-transition metal atoms (Fe, Co) by self-assembly or via atomic manipulation using a scanning tunneling microscope (STM at low temperature. Experiments have been performed on a Au(111) and a Ag(100) substrate. We compare the structural and electronic properties as gained from STM and tunneling spectroscopy (STS). The results will also be compared with theoretical predictions, and a strategic route toward COT-based SMMs will be shown.