Reply to “Comment on ‘Spin-dependent electron transmission model for chiral molecules in mesoscopic devices’”

Yang, Xueyao; Wal, Caspar H. van der; Wees, B. J. van

doi:10.1103/physrevb.101.026404

Cited by 17 publications

(18 citation statements)

References 13 publications

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“…[72] (and see refs. [73,74] for additional discussion). The proof of this claim uses an Onsager-type argument: Consider a two-terminal device with a nonmagnetic source.…”

Section: Theory Of Ciss In Transportmentioning

confidence: 99%

Theory of Chirality Induced Spin Selectivity: Progress and Challenges

et al. 2022

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A critical overview of the theory of the chirality-induced spin selectivity (CISS) effect, that is, phenomena in which the chirality of molecular species imparts significant spin selectivity to various electron processes, is provided. Based on discussions in a recently held workshop, and further work published since, the status of CISS effects-in electron transmission, electron transport, and chemical reactions-is reviewed. For each, a detailed discussion of the stateof-the-art in theoretical understanding is provided and remaining challenges and research opportunities are identified.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adma.202106629.

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“…[72] (and see refs. [73,74] for additional discussion). The proof of this claim uses an Onsager-type argument: Consider a two-terminal device with a nonmagnetic source.…”

Section: Theory Of Ciss In Transportmentioning

confidence: 99%

Theory of Chirality Induced Spin Selectivity: Progress and Challenges

et al. 2022

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“… 19 − 22 Therefore, it requires theories beyond linear response for possible explanations of the MR observed in CISS experiments. 22 − 25 …”

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confidence: 99%

Detecting Chirality in Two-Terminal Electronic Nanodevices

2020

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Central to spintronics is the interconversion between electronic charge and spin currents, and this can arise from the chirality-induced spin selectivity (CISS) effect. CISS is often studied as magnetoresistance (MR) in two-terminal (2T) electronic nanodevices containing a chiral (molecular) component and a ferromagnet. However, fundamental understanding of when and how this MR can occur is lacking. Here, we uncover an elementary mechanism that generates such an MR for nonlinear response. It requires energy-dependent transport and energy relaxation within the device. The sign of the MR depends on chirality, charge carrier type, and bias direction. Additionally, we reveal how CISS can be detected in the linear response regime in magnet-free 2T nanodevices, either by forming a chirality-based spin-valve using two or more chiral components or by Hanle spin precession in devices with a single chiral component. Our results provide operation principles and design guidelines for chirality-based spintronic nanodevices and technologies.

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“…Building on this, we predicted that any magnetization-reversal-induced MR percentage that may emerge beyond linear response must first appear linear in bias, just as in the electrical magneto-chiral effect [24,26]. These results were supported by further theoretical analyses [22,27], but still intrigued much discussion since it cannot fully explain experimental observations [9,28,29].…”

mentioning

confidence: 85%

“…Important to realize, this changing SP cannot be experimentally detected as a charge signal because of the zero MR upon polarization reversal. This major distinction between SP generated by CISS and MR generated by the entire 2T device has been previously addressed [18,[22][23][24]29], but is sometimes still overlooked [35,36].…”

Section: Mr In 2t Spin Valve Geometrymentioning

confidence: 97%

Linear-response magnetoresistance effects in chiral systems

Yang,

van Wees

2021

Preprint

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The chirality-induced spin selectivity (CISS) effect enables the detection of chirality as electrical charge signals. It is often studied in a spin-valve device where a ferromagnet is connected to a chiral component between two electrodes, and a magnetoresistance (MR) is reported upon magnetization reversal. This however is not expected in the linear response regime because of compensating reciprocal processes, thereby limiting the interpretation of experimental results. Here we show that MR effects can indeed appear in the linear response regime, but not by complete magnetization or magnetic field reversal. We illustrate this in a spin-valve device and in a chiral thin film as the CISS-induced Hanle magnetoresistance (CHMR) effect.Chirality-induced spin selectivity (CISS) describes the spin-dependent electron transport through a chiral (molecular) structure [1]. It promises novel applications such as using chiral materials for information technologies (spintronics) [2] and using spintronic techniques for chemistry and biology [3]. However, despite intensive experimental and theoretical investigations [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22], CISS remains poorly understood.

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Reply to “Comment on ‘Spin-dependent electron transmission model for chiral molecules in mesoscopic devices’”

Cited by 17 publications

References 13 publications

Theory of Chirality Induced Spin Selectivity: Progress and Challenges

Theory of Chirality Induced Spin Selectivity: Progress and Challenges

Detecting Chirality in Two-Terminal Electronic Nanodevices

Linear-response magnetoresistance effects in chiral systems

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