SKM 2023 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 33: Spins on Surfaces at the Atomic Scale III
O 33.2: Vortrag
Dienstag, 28. März 2023, 11:00–11:15, REC C 213
Locally driven quantum phase transition cascades in a strongly correlated molecular monolayer — Soroush Arabi1,2,3, Taner Esat2,5, Aizhan Sabitova2,5, Yuqi Wang2,3, Hovan Lee6, Cedric Weber6, Kern Klaus3,4, F. Stefan Tautz1,2,5, Ruslan Temirov2,7, and •Markus Ternes1,2,5 — 1Institute of Physics IIB, RWTH Aachen University, 52074 Aachen, Germany — 2Peter-Grünberg-Institute (PGI 3), Research Center Jülich, 52425 Jülich, Germany — 3Max Planck Institute for Solid State Research, 70569 Stuttgart, Germany — 4Institut de Physique, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland — 5Jülich Aachen Research Alliance, 52425 Jülich, Germany — 6King's College London, Theory and Simulation of Condensed Matter, London WC2R 2LS, UK — 7Institute of Physics II, University of Cologne, 50937 Cologne, Germany
The molecular monolayer of 1,4,5,6-naphthalene tetracarboxylic acid dianhydride on Ag(111) creates a perfectly ordered lattice of π-conjugated organic molecules. Using a movable atomically sharp electrostatic gate we drive this lattice of strongly correlated electrons through a cascade of quantum phase transitions. Performing spec- troscopic imaging with sub-Angstrom resolution, we show that as the gate field is increased, the molecular building blocks change from a Kondo-screened to a paramagnetic phase one by one, enabling us to reconstruct their complex interactions in detail. We anticipate that the supramolecular nature of the system will, in future, allow engineering quantum correlations in arbitrary patterned structures.