Analytic Model of Chiral-Induced Spin Selectivity

Areg Ghazaryan*, Yossi Paltiel, Mikhail Lemeshko

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

39 Scopus citations

Abstract

Organic materials are known to feature long spin-diffusion times, originating in a generally small spin-orbit coupling observed in these systems. From that perspective, chiral molecules acting as efficient spin selectors pose a puzzle that attracted a lot of attention in recent years. Here, we revisit the physical origins of chiral-induced spin selectivity (CISS) and propose a simple analytic minimal model to describe it. The model treats a chiral molecule as an anisotropic wire with molecular dipole moments aligned arbitrarily with respect to the wire's axes and is therefore quite general. Importantly, it shows that the helical structure of the molecule is not necessary to observe CISS and other chiral nonhelical molecules can also be considered as potential candidates for the CISS effect. We also show that the suggested simple model captures the main characteristics of CISS observed in the experiment, without the need for additional constraints employed in the previous studies. The results pave the way for understanding other related physical phenomena where the CISS effect plays an essential role.

Original languageAmerican English
Pages (from-to)11716-11721
Number of pages6
JournalJournal of Physical Chemistry C
Volume124
Issue number21
DOIs
StatePublished - 28 May 2020

Bibliographical note

Publisher Copyright:
Copyright © 2020 American Chemical Society.

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