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Updated: Sep 6, 2025

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Published on: September 25, 2020
Vectorial Electron Spin Filtering by an All-Chiral Metal-Molecule Heterostructure
Chetana Badala Viswanatha1, Johannes Stöckl1, Benito Arnoldi1
1Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, Erwin-Schrödinger-Straße 46, 67663 Kaiserslautern, Germany.
Chiral induced spin selective transmission (CISS) allows spin control in nonmagnetic materials. This study shows CISS in a point-chiral molecule, demonstrating tunable spin control through enantiomer-specific interactions.
Area of Science:
- Condensed Matter Physics
- Surface Science
- Spintronics
Background:
- Chiral induced spin selective transmission (CISS) enables spin manipulation in nonmagnetic nanostructures.
- Previous CISS studies focused on helical molecules, with spin selectivity along the propagation direction.
Purpose of the Study:
- To demonstrate and characterize spin selective electron transmission through a point-chiral molecule (3-methylcyclohexanone) on a chiral surface.
- To investigate the influence of molecular enantiomers on spin transport.
Main Methods:
- Spin- and momentum-resolved photoelectron spectroscopy.
- Adsorption of 3-methylcyclohexanone on a chiral Cu(643)R surface.
Main Results:
- Observed spin-dependent electron transmission through a single layer of 3-methylcyclohexanone.
- Demonstrated that all three spin components are affected by the chiral molecule.
- Showed that changing the molecular enantiomer alters the spin component parallel to the surface.
Conclusions:
- Enantiomer-specific adsorption configurations dictate the observed spin selectivity.
- This work opens avenues for tuning CISS in all-chiral heterostructures via molecule-surface interactions.
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