Dresden 2026 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 89: Spins on surfaces at the atomic scale II
O 89.9: Vortrag
Donnerstag, 12. März 2026, 17:00–17:15, WILL/A317
Statistical analysis of electron-induced switching of a spin-crossover complex — •Jonas Fußangel1, Björn Sothmann1, Sven Johannsen2, Sascha Ossinger3, Felix Tuczek3, Richard Berndt3, Jürgen König1, and Manuel Gruber1 — 1Fakultät für Physik and CENIDE, Universität Duisburg-Essen, 47048 Duisburg, Germany — 2Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany — 3Institut für Anorganische Chemie, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany
Spin-crossover complexes switch between two spin states, but the microscopic pathway remains unclear. Using low-temperature STM, electron-induced switching of [Fe(H2B(pz)(pypz))2] on Ag(111) has opened new perspectives for understanding the switching mechanisms. Current time traces show two levels matching the spin states. An analysis of waiting-time distribution yields switching rates whose voltage dependence is explained by a simple model where transient molecular charging triggers switching. Comparing experiment and theory provides previously inaccessible estimates of LUMO energies [1]. The approach offers new insights into the switching mechanism and predicts higher switching rates when the molecule is electronically decoupled from the substrate, e.g., by introducing an ultrathin insulating layer.
[1] J. Fußangel et al., arXiv: 2506.13373 (2025)
Keywords: spin-crossover complex; time series analysis; waiting-time distribution; scanning tunneling microscopy