SKM 2023 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 7: Spins on Surfaces at the Atomic Scale I
O 7.9: Vortrag
Montag, 27. März 2023, 12:45–13:00, REC C 213
Mapping magnetism with a molecule — •Alex Fétida1, Michelangelo Romeo1, Olivier Bengone1, Marie-Laure Bocquet2, Nicolas Lorente3, and Laurent Limot1 — 1Université de Strasbourg, CNRS, IPCMS, UMR 7504, 67000 Strasbourg, France — 2PASTEUR, Ecole Normale Supérieure, PSL University, Sorbonnes Université, CNRS, 24 Rue Lhomond, 75005 Paris, France — 3Centro de Fisica de Materiales (CFM MPC) CSIC-EHU, 20018 San Sebastián, Spain
The decoration of metal probe-tips by a molecule intentionally picked up from a surface has proven to be a powerful method to improve the measurement capabilities of a scanning tunneling microscope (STM). The success of this approach opens the prospect of introducing spin sensitivity through the tip functionalization by a magnetic molecule. We show here that a metallocene-terminated tip can probe surface magnetism through the inelastic component of the tunneling current, which provides an electrical access to the metallocene spin states. When the tip is 100 picometers away from point contact, the exchange interaction between the tip and a magnetic sample changes the metallocene spin states. This detection scheme can then be used to independently measure the sample exchange field and spin polarization with atomic-scale resolution with knowledge of spin orientation as we show on ultra-thin cobalt layers.