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Incoherent chiral-induced spin selectivity
Mesoscale and Nanoscale Physics · Submitted 27 Dec 2021
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim We focus on the latter and find that localization and the complete loss of coherence due to phonons do not impede strong spin polarization of charge carriers passing through the molecule.
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The abstract, sentence by sentence
The observation of spin-dependent transport through organic chiral structures has sparked numerous fundamental and applicative questions ranging from biology to spintronics. By now, there is a broad consensus that the effect results from the combination of spin-orbit coupling and the systems' unique geometry. However, two key challenges remain. Firstly, accounting for the magnitude of the measured effect in light of the weak spin-orbit coupling in organic systems. Secondly, understanding its observation not only in tunneling-dominated short molecules, but also in longer ones where phonon-assisted hopping via localized states is operative. We focus on the latter and find that localization and the complete loss of coherence due to phonons do not impede strong spin polarization of charge carriers passing through the molecule. Moreover, hopping decouples the energy scale for observing spin-selective transport from the magnitude of the spin-orbit coupling. Thus, our result may explain the observation of large spin selectivity at room temperature and under large applied voltages.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | The observation of spin-dependent transport through organic chiral structures has sparked numerous fundamental and applicative questions ranging from biology to spintronics. | background 1.00 | 0.04 | 0.02 | asserted 0.98 |
| s1 | By now, there is a broad consensus that the effect results from the combination of spin-orbit coupling and the systems' unique geometry. | background 1.00 | 0.04 | 0.03 | asserted 0.99 |
| s2 | However, two key challenges remain. | gap 0.98 | 0.05 | 0.02 | asserted 0.92 |
| s3 | Firstly, accounting for the magnitude of the measured effect in light of the weak spin-orbit coupling in organic systems. | gap 0.98 | 0.05 | 0.02 | asserted 0.61 |
| s4 | Secondly, understanding its observation not only in tunneling-dominated short molecules, but also in longer ones where phonon-assisted hopping via localized states is operative. | gap 0.98 | 0.07 | 0.03 | asserted 0.81 |
| s5 | We focus on the latter and find that localization and the complete loss of coherence due to phonons do not impede strong spin polarization of charge carriers passing through the molecule. | result 0.96 | 0.96 | 0.79 | asserted 1.00 |
| s6 | Moreover, hopping decouples the energy scale for observing spin-selective transport from the magnitude of the spin-orbit coupling. | result 0.51 | 0.82 | 0.20 | asserted 1.00 |
| s7 | Thus, our result may explain the observation of large spin selectivity at room temperature and under large applied voltages. | interpretation 1.00 | 0.46 | 0.25 | hedged possibility 1.00 |
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The paper
Original abstract
The observation of spin-dependent transport through organic chiral structures has sparked numerous fundamental and applicative questions ranging from biology to spintronics. By now, there is a broad consensus that the effect results from the combination of spin-orbit coupling and the systems' unique geometry. However, two key challenges remain. Firstly, accounting for the magnitude of the measured effect in light of the weak spin-orbit coupling in organic systems. Secondly, understanding its observation not only in tunneling-dominated short molecules, but also in longer ones where phonon-assisted hopping via localized states is operative. We focus on the latter and find that localization and the complete loss of coherence due to phonons do not impede strong spin polarization of charge carriers passing through the molecule. Moreover, hopping decouples the energy scale for observing spin-selective transport from the magnitude of the spin-orbit coupling. Thus, our result may explain the observation of large spin selectivity at room temperature and under large applied voltages.
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3 arXiv papers cite this in 3 sentences
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Cites it as background 1 paper
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Other aspects like molecular orientation [ref] , inelastic scattering [ref] , temperature dependence [ref] , electron correlations [ref] , and nonequilibrium conditions [ref] have also been investigated.
Influence of Nonequilibrium Vibrational Dynamics on Spin Selectivity in Chiral Molecular Junctions · Introduction · 0.98
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