Chirality-induced spin selectivity has been attracting extensive interest in recent years and is demonstrated in a variety of chiral molecules, all of which arise from inherent molecular chirality. Here, we first propose a theoretical model to study the spin-dependent electron transport along guanine-quadruplex (G4) DNA molecules, connected to two nonmagnetic electrodes, by considering the molecule–electrode contact and weak spin–orbit coupling. Our results indicate that the G4-DNA molecular junctions exhibit pronounced spin-selectivity effect, and the asymmetric contact-induced external chirality, instead of the inherent molecular chirality, dominates their spin filtration efficiency. Furthermore, the spin-selectivity effect is robust against the disorder and hold in a wide range of model parameters. These results could be checked by charge transport measurements and provide an alternative way to improve the spin-selectivity effect of chiral nanodevices.
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28 June 2023
Research Article|
June 28 2023
Spin-selectivity effect of G-quadruplex DNA molecules Available to Purchase
Special Collection:
Chiral Induced Spin Selectivity
Lei Deng
;
Lei Deng
(Conceptualization, Formal analysis, Investigation, Writing – original draft)
Hunan Key Laboratory for Super-microstructure and Ultrafast Process, School of Physics and Electronics, Central South University
, Changsha 410083, China
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Irfan Hussain Bhat
;
Irfan Hussain Bhat
(Writing – review & editing)
Hunan Key Laboratory for Super-microstructure and Ultrafast Process, School of Physics and Electronics, Central South University
, Changsha 410083, China
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Ai-Min Guo
Ai-Min Guo
a)
(Conceptualization, Formal analysis, Funding acquisition, Methodology, Project administration, Supervision, Validation, Writing – review & editing)
Hunan Key Laboratory for Super-microstructure and Ultrafast Process, School of Physics and Electronics, Central South University
, Changsha 410083, China
a)Author to whom correspondence should be addressed: [email protected]
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,
,
Irfan Hussain Bhat
Ai-Min Guo
a)
Hunan Key Laboratory for Super-microstructure and Ultrafast Process, School of Physics and Electronics, Central South University
, Changsha 410083, China
a)Author to whom correspondence should be addressed: [email protected]
Note: This paper is part of the JCP Special Topic on Chiral Induced Spin Selectivity.
J. Chem. Phys. 158, 244116 (2023)
Article history
Received:
April 29 2023
Accepted:
June 12 2023
Citation
Lei Deng, Irfan Hussain Bhat, Ai-Min Guo; Spin-selectivity effect of G-quadruplex DNA molecules. J. Chem. Phys. 28 June 2023; 158 (24): 244116. https://doi.org/10.1063/5.0156389
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