Chirality-Dependent Electron Spin Filtering by Molecular Monolayers of Helicenes
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
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
Original language | English |
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Pages (from-to) | 2025-2030 |
Number of pages | 6 |
Journal | The journal of physical chemistry letters |
Volume | 9 |
Issue number | 8 |
Publication status | Published - 19 Apr 2018 |
Peer-reviewed | Yes |
External IDs
Scopus | 85045762554 |
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PubMed | 29618210 |
ORCID | /0000-0001-8121-8041/work/142240872 |