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O: Fachverband Oberflächenphysik
O 102: Poster Session VIII: Organic molecules on inorganic substrates: electronic, optical and other properties IV
O 102.7: Poster
Thursday, March 4, 2021, 13:30–15:30, P
A multifunctional organic interface: decoupling the spin tuning from molecule-metal hybridization — •H. Sturmeit1, I. Cojocariu2, M. Jugovac2, A. Windischbacher3, P. Puschnig3, C. Piamonteze4, A. Sala5,6, G. Comelli5,6, A. Cossaro5, A. Verdini5, L. Floreano5, M. Stredansky5,6, E. Vesselli5,6, C. Hohner8, M. Kettner8, J. Libuda8, C. M. Schneider2,7, G. Zamborlini1, M. Cinchetti1, and V. Feyer2,7 — 1TU Dortmund, Dortmund, Germany — 2Forschungszentrum Jülich, Jülich, Germany — 3Karl-Franzens-Universität, Graz, Austria — 4Paul-Scherrer-Institute, Villigen, Switzerland — 5Lab. TASC IOM-CNR, Trieste, Italy — 6University of Trieste, Trieste, Italy — 7Universität Duisburg-Essen, Duisburg, Germany — 8Friedrich-Alexander-Universität, Erlangen, Germany
The possibility to separately address and control the spin and charge properties at a metal/organic interface could pave the way to a new generation of multifunctional devices. Here, by using a theoretical and experimental spectro-microscopy approach, we introduce a system with decoupled, and therefore independently tunable, spin and electronic properties. A single layer of nickel tetraphenyl porphyrin molecules strongly interacts with the copper (100) surface, causing a massive charge transfer and the uncommon Ni(I) oxidation state. We find that by dosing nitrogen dioxide (NO2) the Ni(II) oxidation state of the gas phase molecule can be restored while the substrate-induced high-spin configuration is preserved.