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O: Fachverband Oberflächenphysik
O 25: Organic Molecules on Inorganic Substrates III: Adsorption & Growth
O 25.3: Talk
Tuesday, March 19, 2024, 11:00–11:15, MA 043
Constructing chiral overlayers: From single molecules to closed layers — •Jonas Brandhoff1, Fumi Nishino2,3, Keisuke Fukutani2,3, Marco Gruenewald1, Maximilian Schaal1, Felix Otto1, Roman Forker1, Satoshi Kera2,3, and Torsten Fritz1 — 1Institute of Solid State Physics, Friedrich Schiller University Jena, Helmholtzweg 5, 07743 Jena, Germany — 2Institute for Molecular Science, Myodaiji, 444-8585, Okazaki, Japan — 3The Graduate University of Advanced Studies, Hayama-cho, 240-193 Kanagawa, Japan
Recently, the interest in chiral molecules has spiked. The chirality-induced spin selectivity (CISS) promises a high spin-polarizability for electrons traversing a chiral molecule. However, the CISS effect is yet not fully understood. To be able to probe the CISS effect with area averaging methods like photoelectron spectroscopy a well-defined chiral surface, consisting of chiral molecules, is needed. In this study the chiral molecule BINAP is investigated on a Au(111) surface. To understand how chirality from one single molecule evolves into a fully chiral overlayer, a coverage dependent study, showing many different structural motifs of BINAP, was done. This structural evolution was investigated using scanning tunneling microscopy (STM) and low-energy electron diffraction (LEED). In combination, these methods reveal a chiral lattice and the role of the different molecule-molecule and molecule-substrate interactions will be discussed. This study offers a deeper insight in the engineering of chiral surfaces and opens a possible pathway towards spintronic applications.
Keywords: Chirality; STM; LEED