Regensburg 2016 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 13: Magnetic Surface Excitations
O 13.8: Vortrag
Montag, 7. März 2016, 17:00–17:15, S052
Spin manipulation by creation of single-molecule radical cations — •Sujoy Karan1,2, Na Li3, Yajie Zhang4, Yang He3, I-Po Hong3, Huanjun Song4, Jing-Tao Lü5, Yongfeng Wang1,3, Lianmao Peng3, Kai Wu4, Georg S. Michelitsch6, Reinhard J. Maurer6, Katharina Diller6, Karsten Reuter6, Alexander Weismann1, and Richard Berndt1 — 1Institut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel, 24098 Kiel, Germany — 2Institut für Experimentelle und Angewandte Physik, Universität Regensburg, 93053 Regensburg, Germany — 3Key Laboratory for the Physics and Chemistry of Nanodevices, Department of Electronics, Peking University, Beijing 100871, P. R. China — 4College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China — 5School of Physics, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, P. R. China — 6Lehrstuhl für Theoretische Chemie, Technische Universität München, 85747 Garching, Germany
All-trans-retinoic acid (ReA), a closed-shell organic molecule comprising only C, H, and O atoms, is investigated on a Au(111) substrate using scanning tunneling microscopy and spectroscopy. In dense arrays single ReA molecules are switched to a number of states, few of which carry a localized spin as evidenced by conductance spectroscopy in high magnetic fields. The spin of a single molecule may be reversibly switched on and off without affecting its neighbors. We suggest that ReA on Au is readily converted to a radical by the abstraction of an electron.