Dresden 2017 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 110: Molecular Films: Morphology, Electronics, Photovoltaics

O 110.3: Vortrag

Freitag, 24. März 2017, 11:15–11:30, GER 38

Electronic Properties of Tailored Co-Salophene Based Building Blocks on Ag(111) — •Micha Elsebach1, Emil Sierda1, Bernhard Bugenhagen2, Marc Prosenc2, Roland Wiesendanger1, and Maciej Bazarnic11Institute for Nanostructures and Solid State Physics, University of Hamburg, D-20355 Hamburg, Germany — 2Institute of Inorganic Chemistry, University of Hamburg, D-20146 University of Hamburg, Germany

Spintronic devices based on molecules are a promising approach for the future of information technology. Recently we showed that Co-salophenes can be used for the fabrication of such a device on Au(111) [1]. The basic building blocks for this device are 2Br-Co-salophenes and 3Br-3Co-salophenes. These molecules can be covalently linked by the use of an on-surface Ullmann reaction. On the Au(111)-surface the Kondo effect inhibits the control of the molecules' magnetic centers by an external magnetic field. Therefore we are searching for a different substrate material, on which all properties of the molecules are preserved, excluding the Kondo screening.

In this talk I will present STM studies on the electronic properties of single molecules as well as molecular chains formed by Ullmann reaction on Ag(111). The results show that the electronic structure of the molecules is promising for a working spintronic device, and that there is no Kondo effect on the Ag(111)-substrate.

[1] Bazarnik et al. Nano Letters 2016 16 (1), 577-582

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