SKM 2023 – scientific programme
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O: Fachverband Oberflächenphysik
O 2: Organic Molecules on Inorganic Substrates I: Electronic, Optical and Other Properties I
O 2.3: Talk
Monday, March 27, 2023, 11:00–11:15, CHE 89
Current Driven Unidirectional Rotation of Geländer Molecule — •Štěpán Marek1, Jan Wilhelm2, Richard Korytár1, and Ferdinand Evers2 — 1Department of Condensed Matter Physics, Faculty of Mathematics and Physics, Charles University, Czech Republic — 2Condensed Matter Theory Group, Institute of Physics, Faculty of Theoretical Physics, University of Regensburg, Bavaria, Germany
Rotations of molecules driven by current are possible basis for construction of molecular motors. In "Geländer" molecules, the chiral structure was thought to drive the momentum transfer from travelling electrons to the molecule. We construct a simple model, motivated by our DFT based study, to explore the structure of the current density in such a molecule and identify the regions of the molecule that contribute majority of the angular momentum of the electron current. We also discuss the particularities of our results, especially the conservation of rotation direction under the exchange of electric bias direction. The results are compared with experimental observations.