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O: Fachverband Oberflächenphysik
O 44: Poster Tuesday: Spins and Magnetism
O 44.3: Poster
Dienstag, 2. April 2019, 18:00–20:00, Poster D
Kondo effect of a singly occupied molecular orbital in bis(phthalocyaninato)-dysprosium double decker molecules — •Timo Frauhammer1, Gabriel Derenbach1, Svetlana Klyatskaya2, Eufemio Moreno-Pineda2, Mario Ruben2, and Wulf Wulfhekel1,2 — 1Physikalisches Institut, Karlsruhe Institute of Technology (KIT), Germany — 2Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Germany
Double decker bis(phthalocyaninato)-dysprosium single molecule magnets adsorbed on Au(111) have been investigated using low temperature STM. No direct magnetic signal by the 4f electrons could be detected in STS. Interestingly, all molecules adsorbed on step edges show a clear Kondo resonance on the ligands with a Kondo temperature of about 4 K. Some molecules arranged in islands show the same behaviour. This indicates an odd number of electrons residing in the molecular orbitals of the ligands. Assuming there is a strong enough exchange coupling between the unpaired spin on the ligands and the 4-f angular momentum of the Dy central ion, the observed Kondo effect might be used as a means to indirectly address the 4-f magnetic moment.