Chiral Molecules and the Spin Selectivity Effect

R. Naaman*, Y. Paltiel*, D. H. Waldeck*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

133 Scopus citations


This Perspective discusses recent experiments that bear on the chiral induced spin selectivity (CISS) mechanism and its manifestation in electronic and magnetic properties of chiral molecules and materials. Although the discussion emphasizes newer experiments, such as the magnetization dependence of chiral molecule interactions with ferromagnetic surfaces, early experiments, which reveal the nonlinear scaling of the spin filtering with applied potential, are described also. In many of the theoretical studies, one has had to invoke unusually large spin-orbit couplings in order to reproduce the large spin filtering observed in experiments. Experiments imply that exchange interactions and Pauli exclusion constraints are an important aspect of CISS. They also demonstrate the spin-dependent charge flow between a ferromagnetic substrate and chiral molecules. With these insights in mind, a simplified model is described in which the chiral molecule's spin polarization is enhanced by a spin blockade effect to generate large spin filtering.

Original languageAmerican English
Pages (from-to)3660-3666
Number of pages7
JournalJournal of Physical Chemistry Letters
Issue number9
StatePublished - 7 May 2020

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© 2020 American Chemical Society.


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