TY - JOUR
T1 - Analytic Model of Chiral-Induced Spin Selectivity
AU - Ghazaryan, Areg
AU - Paltiel, Yossi
AU - Lemeshko, Mikhail
N1 - Publisher Copyright:
Copyright © 2020 American Chemical Society.
PY - 2020/5/28
Y1 - 2020/5/28
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85088018694&partnerID=8YFLogxK
U2 - 10.1021/acs.jpcc.0c02584
DO - 10.1021/acs.jpcc.0c02584
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AN - SCOPUS:85088018694
SN - 1932-7447
VL - 124
SP - 11716
EP - 11721
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 21
ER -