Theory of Chirality Induced Spin Selectivity: Progress and Challenges

Evers, Ferdinand; Aharony, Amnon; Bar‐Gill, Nir; Entin‐Wohlman, O.; Hedegård, Per; Hod, Oded; Jelı́nek, Pavel; Kamieniarz, G.; Lemeshko, Mikhail; Michaeli, Karen; Mújica, Vladimiro; Naaman, Ron; Paltiel, Yossi; Refaely-Abramson, Sivan; Tal, Oren; Thijssen, J. H. H.; Thoss, Michael; Ruitenbeek, J. M. van; Venkataraman, Latha; Yan, Binghai; Kronik, Leeor

doi:10.48550/arxiv.2108.09998

Cited by 8 publications

(10 citation statements)

References 92 publications

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“…Using an intrinsic Rashba coupling approach provides some analogous conclusions [24]. However, a unifying theoretical description of all CISS-like effects is still an active area of research [25].…”

Section: Helical Edonormentioning

confidence: 99%

On the Origins of Life's Homochirality: Inducing Enantiomeric Excess with Spin-Polarized Electrons

Ozturk,

Sasselov

2022

Preprint

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Life as we know it is homochiral, but the origins of biological homochirality on early Earth remain elusive. Shallow closed-basin lakes are a plausible prebiotic environment on early Earth, and most are expected to have significant sedimentary magnetite deposits. We hypothesize that UV (200-300nm) irradiation of magnetite deposits could generate hydrated spin-polarized electrons sufficient to induce chirally selective prebiotic chemistry. Such electrons are potent reducing agents that drive reduction reactions where the spin polarization direction can alter enantioselectively the reaction kinetics. Our estimate of this chiral bias is based on the strong effective spin-orbit coupling observed in the chiral-induced spin selectivity (CISS) effect, as applied to energy differences in reduction reactions for different isomers. In the original CISS experiments, spin selective electron transmission through a monolayer of dsDNA molecules is observed at room temperature-indicating a strong coupling between molecular chirality and electron spin. We propose that the chiral symmetry breaking due to the CISS effect, when applied to reduction chemistry, can induce enantioselective synthesis on the prebiotic Earth and thus facilitate the homochiral assembly of life's building blocks.

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Section: Helical Edonormentioning

confidence: 99%

On the Origins of Life's Homochirality: Inducing Enantiomeric Excess with Spin-Polarized Electrons

Ozturk,

Sasselov

2022

Preprint

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“…Examples are chiral magnets, chiral metals or chiral molecules, for instance in the context of chiral induced selective spin transport 1 . Molecules such as DNA or similar structures, either single stranded or doubly stranded, have been studied [2][3][4][5][6][7][8][9][10][11][12][13][14] . Even though some controversy is still unresolved on a proper description of the large effect found experimentally for the spin polarization through specific chiral structures 14 , there is a variety of proposals, from an effect due to the spin of the electrons [2][3][4][5][6][7][8][9][10] , due to an orbital contribution 15 , or due to a mixture of both 12 .…”

Section: Introductionmentioning

confidence: 99%

Topological states in chiral electronic chains

Sacramento

Madeira²

2022

Phys. Rev. B

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We consider the influence of topological phases, or their vicinity, on the spin density and spin polarization through a chiral chain. We show the quantization of the Berry phase in a one-dimensional polarization helix structure, under the presence of an external magnetic field, and show its influence on the spin density. The polar angle of the momentum space spin density becomes quantized in the regime that the Berry phase is quantized, as a result of the combined effect of the induced spin-orbit coupling and the external transverse magnetic field, while the edge states do not show the polar angle quantization, in contrast with the bulk states. Under appropriate conditions, the model can be generalized to have similarities with a chain with non-homogeneous Rashba spin-orbit couplings, with zero or low energy edge states. Due to the breaking of time-reversal symmetry, we recover the effect of chiral induced spin polarization and spin transport across the chiral chain, when coupling to external leads. Some consequences of the quantized spin polarization and low energy states on the spin transport are discussed.

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“…The present status of theoretical studies is well summarized in Ref. [27]. In order to find an alternative explanation, we would like to understand the fact that CISS effect is observed even in the organic molecules with weak SOC strength in a way that do not rely explicitly on the strength of the SOC.…”

mentioning

confidence: 99%

Chirality-Induced Spin Filtering in Pseudo Jahn-Teller Molecules

Kato,

Yamamoto,

Kishine

2021

Preprint

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Chirality-induced spin selectivity (CISS) refers to an ability to induce a spin polarization of an electron transmitted through chiral materials. An important experimental observation is that incredibly large spin polarization is realized at room temperature even for the organic molecules that have weak spin-orbit coupling (SOC), although SOC is an only interaction that can manipulate the electrons' spins in the setups. Therefore, the mechanism of the CISS needs to be constructed in a way insensitive to or enhancing the magnitude of the SOC strength. In this Letter, we describe a theoretical study for CISS with a model chiral molecule that belongs to the point group C 3 . In this molecule, electronic translational and rotational degrees of freedom for an injected electron are coupled one another via the nuclear vibrational mode with a pseudo Jahn-Teller effect. By properly taking the molecular symmetry as well as the time reversal symmetry into account and classifying the molecular ground states by their angular and spin momentum quantum numbers, we show that the chiral molecule can act as an efficient spin-filter. The efficiency of this spin-filtering can be nearly independent of the SOC strength in this model, while it well exceeds the spin-polarization relying solely on the SOC. The nuclear vibrations turned out to have the role of not only mediating the translation-rotation coupling, but also enhancing the spin-filtering efficiency.

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Theory of Chirality Induced Spin Selectivity: Progress and Challenges

Cited by 8 publications

References 92 publications

On the Origins of Life's Homochirality: Inducing Enantiomeric Excess with Spin-Polarized Electrons

On the Origins of Life's Homochirality: Inducing Enantiomeric Excess with Spin-Polarized Electrons

Topological states in chiral electronic chains

Chirality-Induced Spin Filtering in Pseudo Jahn-Teller Molecules

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