Chirality-Dependent Electron Spin Filtering by Molecular Monolayers of Helicenes
Publikation: Beitrag in Fachzeitschrift › Forschungsartikel › Beigetragen › Begutachtung
Beitragende
Abstract
The interaction of low-energy photoelectrons with well-ordered monolayers of enantiopure helical heptahelicene molecules adsorbed on metal surfaces leads to a preferential transmission of one longitudinally polarized spin component, which is strongly coupled to the helical sense of the molecules. Heptahelicene, composed of only carbon and hydrogen atoms, exhibits only a single helical turn but shows excess in longitudinal spin polarization of about P Z = 6 to 8% after transmission of initially balanced left- and right-handed spin polarized electrons. Insight into the electronic structure, that is, the projected density of states, and the spin-dependent electron scattering in the helicene molecule is gained by using spin-resolved density functional theory calculations and a model Hamiltonian approach, respectively. Our results support the semiclassical picture of electronic transport along a helical pathway under the influence of spin-orbit coupling induced by the electrostatic molecular potential.
Details
Originalsprache | Englisch |
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Seiten (von - bis) | 2025-2030 |
Seitenumfang | 6 |
Fachzeitschrift | The journal of physical chemistry letters |
Jahrgang | 9 |
Ausgabenummer | 8 |
Publikationsstatus | Veröffentlicht - 19 Apr. 2018 |
Peer-Review-Status | Ja |
Externe IDs
Scopus | 85045762554 |
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PubMed | 29618210 |
ORCID | /0000-0001-8121-8041/work/142240872 |