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O: Fachverband Oberflächenphysik
O 86: Poster Session - Organic Molecules on Inorganic Substrates: Electronic, Optical and other Properties II
O 86.4: Poster
Mittwoch, 18. März 2020, 18:15–20:00, P2/EG
Vibron-assisted spin excitation in a magnetically anisotropic molecule — •Garnier L.1, Verlhac B.1, Bachellier N.1, Zaldívar J.2, Rubio-Verdú C.2, Abufager P.3, Ormaza M.1, Choi D.-J.4,6, Bocquet M.-L.5, Pascual J.I2,6, Lorente N.4, and Limot L.1 — 1Université de Strasbourg, CNRS, IPCMS, UMR 7504, F-67000 Strasbourg, France — 2CIC nanoGUNE, 20018 Donostia-San Sebastián, Spain — 3Instituto de Física de Rosario, CONICET and Universidad Nacional de Rosario, Av. Pellegrini 250 (2000) Rosario, Argentina — 4Centro de Física de Materiales (CFM) & DIPC, 20018 Donostia-San San Sebastián, Spain — 5PASTEUR, ENS, Sorbonne Universités, CNRS, 75005 Paris, France — 6Ikerbasque, Basque Foundation for Science, Bilbao, Spain
The electrical control and readout of molecular spin states is key for high-density storage. Expectations are that electrically-driven spin and vibrational excitations in a molecule should give rise to new conductance features in the presence of magnetic anisotropy, offering alternative routes to study and, ultimately, manipulate molecular magnetism. Here, we use inelastic electron tunneling spectroscopy to promote and detect the excited spin states of a prototypical molecule with magnetic anisotropy. We demonstrate the existence of a vibron-assisted spin excitation that can exceed in energy and in amplitude a simple excitation among spin states. The excitation, which can be quenched by chemical changes in the magnetic molecule, is explained using first-principles calculations and model calculations that include dynamical correlations.