| AVS 64th International Symposium & Exhibition | |
| Magnetic Interfaces and Nanostructures Division | Wednesday Sessions |
| Session MI+SA-WeM |
| Session: | Controlling Magnetism in Oxides and Multiferroics and Chirality in Spin Transport and Magnetism (cont.) |
| Presenter: | Paul Möllers, Westfälische Wilhelms-Universität Münster, Germany |
| Authors: | P. Möllers, Westfälische Wilhelms-Universität Münster, Germany M. Kettner, Westfälische Wilhelms-Universität Münster, Germany D. Nürenberg, Westfälische Wilhelms-Universität Münster, Germany F. Tassinari, Weizmann Institute of Science, Israel T. Markus, Weizmann Institute of Science, Israel C. Achim, Carnegie Mellon University R. Naaman, Weizmann Institute of Science, Israel H. Zacharias, Westfälische Wilhelms-Universität Münster, Germany |
| Correspondent: | Click to Email |
The yield of electrons transmitted through chiral molecules can depend on the electron’s spin; chiral molecules can therefore act a spin filters. This effect is referred to as chirality-induced spin selectivity (CISS). Previous experiments have e.g. been performed with monolayers of double-stranded DNA adsorbed on gold [1] and silicon [2] substrates. In this contribution, we present results of our spin-resolved photoemission experiments performed at room temperature. The samples consist of self-assembled monolayers of helical molecules – various types of double-stranded peptide nucleic acid (PNA) – on polycrystalline gold surfaces. The samples are irradiated by a laser at λ = 213nm to generate photoelectrons from the gold substrate which are then transmitted through the adsorbed monolayer. Subsequently, the electrons are analyzed by a Mott polarimeter. We found longitudinal spin polarizations of −6% for PNA and +25% for γ-PNA. The results indicate that the adsorbed molecules act as a spin filter.
[1] B. Göhler et al., Science 331, 894 (2011)
[2] M. Kettner et al., Adv. Mater. Interfaces 3, 1600595 (2016)