Dresden 2020 – scientific programme
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O: Fachverband Oberflächenphysik
O 110: Surface Magnetism I (joint session O/MA)
O 110.9: Talk
Thursday, March 19, 2020, 17:00–17:15, WIL A317
Spin-polarized photoelectron emission from chiral cupric oxide layers — •Paul Möllers1, Daniel Nürenberg1, Koyel Banerjee Ghosh2, Wenyan Zhang2, Francesco Tassinari2, Yitzhak Mastai2, Ortal Lidor-Shalev2, Simon Wei3, Emil Wierzbinski3, David Waldeck3, Ron Naaman2, and Helmut Zacharias1 — 1Center for Soft Nanoscience, Westfälische Wilhelms-Universität, 48149 Münster, Germany — 2Department of Chemical and Biological Physics, Weizmann Institute of Science, 76100 Rehovot, Israel — 3Chemistry Department, University of Pittsburgh, Pittsburgh, PA 15260, United States
The chirality-induced spin selectivity (CISS) effect introduces a coupling between the linear and the spin angular momentum of electrons moving through a chiral molecule [1]. Chiral cupric oxide (CuO) layers can be grown by electrodeposition from a solution containing chiral precursor molecules such as tartaric acid [2]. The choice of the enantiomer of this precursor determines the chiral crystal structure and the preferential crystallographic orientation.
Here, we present results from spin-resolved photoemission experiments performed with chiral CuO layers to investigate the presence of CISS. We demonstrate that the spin polarization observed in these layers can be exploited to enhance the chemical selectivity of an electrocatalytic water splitting reaction [3].
[1] R. Naaman et al., Nat Rev Chem 3, 250 (2019) [2] Kothari et al., Chem. Mater. 16, 4232 (2004) [3] K. B Gosh et al., J. Phys. Chem. C 123, 3024 (2019)