SKM 2023 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 42: Poster: Nanostructures at Surfaces
O 42.6: Poster
Dienstag, 28. März 2023, 18:00–20:00, P2/EG
Spin Switching in Self-Assembled Tetramers on Ag(111) — •Sven Johannsen1, Sascha Ossinger2, Sascha Schüddekopf1, Jan Grunwald3, Alexander Hermann4, Troels Markussen5, Heiko Wende4, Felix Tuczek3, Manuel Gruber4, and Richard Berndt1 — 1Institute of Experimental and Applied Physics, CAU Kiel, Germany — 2Department of Chemistry, University of Basel, Switzerland — 3Institute of Inorganic Chemistry, CAU Kiel, Germany — 4Faculty of Physics and CENIDE, University of Duisburg-Essen, Germany — 5Synopsys Denmark, Fruebjergvej 3, 2100 Copenhagen, Denmark
Spin-crossover (SCO) molecules can be switched between a low spin (LS) state and a high spin (HS) state. Adsorption to a surface can lead to a drastic change of the SCO behaviour. We present a low-temperature scanning-tunneling-microscope investigation of the switching characteristics of metal-based SCO molecules organized in tetramers on a Ag(111) surface. Via the injection of current pulses two molecules per tetramer can be reversibly switched. In addition, these molecules may be switched remotely by applying the excitation to one of the other two molecules of the tetramers. The latter molecules themselves are immutable. We induced tens of thousands of switching events using different currents and voltages and observed that the switching yields that are 2 to 3 orders of magnitude larger compared to previous results. We show that the switching is likely linked to a spin transition and also report three-state switching that involves charging of a molecule.