Dresden 2026 – scientific programme

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O: Fachverband Oberflächenphysik

O 69: Nanostructures at surfaces:1D, 2D, networks – Poster

O 69.4: Poster

Wednesday, March 11, 2026, 18:00–20:00, P2

Cooperative Rotation and Spin Switching of Molecules in Artificial Arrays — •Niklas Ide, Arnab Banerjee, Richard Berndt, and Alexander Weismann — IEAP, Kiel, Germany

Artificial arrays of tin phthalocyanine (SnPc) molecules on Pb(100) substrate are investigated using a low-temperature scanning tunneling microscope. Switching the central SnPc molecule between its two out-of-plane configurations (SnPc↑ → SnPc↓) triggers a collective rotation of all surrounding molecules in the array. This correlated structural response is accompanied by a change of the molecular spin states. A model of the intermolecular and molecular substrate interactions reproduces the experimental observations.

Keywords: Phthalocyanine; Spin switch; Molecular machine