Spin-dependent charge transport through 2D chiral hybrid lead-iodide perovskites

Lu, Haipeng; Wang, Jingying; Xiao, Chuanxiao; Pan, Xin; Chen, Xihan; Brunecky, Roman; Berry, Joseph J.; Zhu, Kai; Beard, Matthew C.; Vardeny, Z. Valy

doi:10.1126/sciadv.aay0571

Cited by 368 publications

(510 citation statements)

References 41 publications

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“…These structural insights, coupled with theoretical findings in our work, enable the discovery and design of an emerging class of multifunctional hybrid systems with an amalgam of semiconducting, chiroptical, and spin-dependent properties. Indeed, the combination of chiral induced spin selectivity of chiral organic molecules [56][57][58][59][60][61][62] and an intrinsic RD spin-splitting in the inorganic framework is a hitherto unexplored aspect unique to 2D chiral HOIPs and might have practical implications in future HOIP-based spintronics. Further, the structural chirality transfer and ensuing lowering of symmetry within the inorganic sublattice opens up a gateway to other emergent properties such as nonlinear light-matter interactions and piezo-/ferroelectricity, not just in 2D HOIPs but also in related diverse low-dimensional metal halide hybrids.…”

Section: Discussionmentioning

confidence: 99%

Organic-to-inorganic structural chirality transfer in a 2D hybrid perovskite and impact on Rashba-Dresselhaus spin-orbit coupling

et al. 2020

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Translation of chirality and asymmetry across structural motifs and length scales plays a fundamental role in nature, enabling unique functionalities in contexts ranging from biological systems to synthetic materials. Here, we introduce a structural chirality transfer across the organic–inorganic interface in two-dimensional hybrid perovskites using appropriate chiral organic cations. The preferred molecular configuration of the chiral spacer cations, R-(+)- or S-(−)-1-(1-naphthyl)ethylammonium and their asymmetric hydrogen-bonding interactions with lead bromide-based layers cause symmetry-breaking helical distortions in the inorganic layers, otherwise absent when employing a racemic mixture of organic spacers. First-principles modeling predicts a substantial bulk Rashba-Dresselhaus spin-splitting in the inorganic-derived conduction band with opposite spin textures between R- and S-hybrids due to the broken inversion symmetry and strong spin-orbit coupling. The ability to break symmetry using chirality transfer from one structural unit to another provides a synthetic design paradigm for emergent properties, including Rashba-Dresselhaus spin-polarization for hybrid perovskite spintronics and related applications.

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Section: Discussionmentioning

confidence: 99%

Organic-to-inorganic structural chirality transfer in a 2D hybrid perovskite and impact on Rashba-Dresselhaus spin-orbit coupling

et al. 2020

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“…Such a bias-even MR is indeed in agreement with most experimental observations. 5 , 6 , 8 − 12 The experimental conditions concerning the vanishing MR in the linear response regime are however unclear, since sometimes the currents are too low to be measured. 5 , 6 , 9 For experiments where a linear response regime can be identified, some do show a strongly suppressed or vanishing MR, 8 , 12 while some do not.…”

Section: Discussionmentioning

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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“…[8][9][10] Recently chiral materials have been used in spintronic devices as a spin filters due to chiral-induced spin selectivity. [11][12][13] Chiral non-centrosymmetric molecules and crystals can be categorized into 65 Sohncke space groups within different Bravais lattices and point groups (see for example the review by Long et al in Ref. 14).…”

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confidence: 99%