Recent progress on measurement of spin–charge interconversion in topological insulators using ferromagnetic resonance

Dey, Rik; Roy, Anupam; Register, Leonard F.; Banerjee, S.

doi:10.1063/5.0049887

Cited by 9 publications

(4 citation statements)

References 132 publications

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“…REE and IREE have been observed in a range of different materials including metallic interfaces, [ 1–3,8,9 ] van der Waals heterostructures, [ 82,83 ] transition‐metal dichalcogenides, [ 84 ] oxide heterostructures. [ 85,86 ] Strong Edelstein effects are also observed at the surfaces of topological insulators, [ 4–6,87–91 ] where the conducive surface states are Weyl cones; this band shape radically differs from the Rashba bands examined in this study, thus they are not accounted for in our modeling.…”

Section: Resultsmentioning

confidence: 85%

Fermi Surface Topology and Rashba‐Edelstein Charge‐Spin Conversion in Lead‐Halide Perovskites

Filippetti

Wadhwa

Caddeo

et al. 2023

Advcd Theory and Sims

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The conversion of charge current into spin current by the Rashba–Edelstein effect enables the reciprocal control of electron charge and magnetization in magnetoelectric and magneto‐optical devices. The fundamentals of this effect are described in 3D lead‐halide perovskites: due to spin‐momentum locking, a strong charge‐spin conversion, widely tunable by the injected charge density, is envisaged. The analysis highlights the close relationship between charge‐spin conversion and the topological transition occurring from the low‐density, torus‐shaped Fermi surface (genus 1) to the high‐density, simply connected Fermi surfaces (genus 0). At room temperature, spin‐polarizations as large as ≈10% are obtained for input charge currents in the ≈102 to 106 Acm−2 range; at low temperature, almost full spin‐polarization can be achieved, owed to the large, impurity scattering‐limited mobilities. The results qualify lead‐halide perovskites as suitable materials for spin‐orbitronic applications.

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Section: Resultsmentioning

confidence: 85%

Fermi Surface Topology and Rashba‐Edelstein Charge‐Spin Conversion in Lead‐Halide Perovskites

Filippetti

Wadhwa

Caddeo

et al. 2023

Advcd Theory and Sims

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“…We give an overview on the common theoretical approaches to discuss the Edelstein effect as well as on various materials exhibiting an Edelstein effect, and a brief summary of the most relevant experimental techniques for the observation of the Edelstein effect. This article complements reviews on Rashba physics [29][30][31][32], spincharge-interconversion [33][34][35][36][37], and orbital transport [22].…”

Section: Introductionmentioning

confidence: 85%

Theory of spin and orbital Edelstein effects

Johansson

2024

J. Phys.: Condens. Matter

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In systems with broken spatial inversion symmetry, such as surfaces, interfaces, or bulk systems lacking an inversion center, the application of a charge current can generate finite spin and orbital densities associated with a nonequilibrium magnetization, which is known as spin and orbital Edelstein effect (SEE and OEE), respectively. Early reports on this current-induced magnetization focus on two-dimensional Rashba systems, in which an in-plane nonequilibrium spin density is generated perpendicular to the applied charge current. However, until today, a large variety of materials have been theoretically predicted and experimentally demonstrated to exhibit a sizeable Edelstein effect, which comprises contributions from the spin as well as the orbital degrees of freedom, and whose associated magnetization may be out of plane, nonorthogonal, and even parallel to the applied charge current, depending on the system's particular symmetries. In this review, we give an overview on the most commonly used theoretical approaches for the discussion and prediction of the SEE and OEE. Further, we introduce a selection of the most intensely discussed materials exhibiting a finite Edelstein effect, and give a brief summary of common experimental techniques.

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“…The development of spintronic devices based on the electrical manipulation of magnetization has been fueled by the discovery of various topological materials. [ 1–3 ] At first, it was thought that the presence of magnetic materials (or strong magnetic fields) could be a problem in topological materials as it would lead to time‐reversal symmetry breaking. This would make surface states no longer be topologically protected, leading to electron backscattering and localization; thus, causing dissipation in transport.…”

Section: Introductionmentioning

confidence: 99%

“…The development of spintronic devices based on the electrical manipulation of magnetization has been fueled by the discovery of various topological materials. [1][2][3] At first, it was thought that the presence of magnetic materials (or strong magnetic fields) and NbAs, which represent the first experimental realization of WSMs. This family of compounds crystallizes in noncentrosymmetric lattice with mirror symmetry in the (100) and (010) directions.…”

Section: Introductionmentioning

confidence: 99%

Efficient Spin‐to‐Charge Interconversion in Weyl Semimetal TaP at Room Temperature

Mendes

Vieira

Cunha

et al. 2022

Adv Materials Inter

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In this paper, spin‐to‐charge current conversion properties in the Weyl semimetal TaP by means of the inverse Rashba–Edelstein effect (IREE) with the interfacial integration of this quantum material with the ferromagnetic metal Permalloy (Py = Ni81Fe19) are presented. The spin currents are generated in the Py layer by the spin pumping effect (SPE) from microwave‐driven ferromagnetic resonance and are detected by a dc voltage along the TaP crystal, at room temperature. A field‐symmetric voltage signal is observed without the contamination of asymmetrical lines due to spin rectification effects observed in studies using metallic ferromagnets. The observed voltage is attributed to spin‐to‐charge current conversion based on the IREE, made possible by the spin–orbit coupling induced intrinsically by the bulk band structure of Weyl semimetals. The measured IREE coefficient λIREE = (0.30 ± 0.01) nm is two orders of magnitude larger than in graphene and is comparable to or larger than the values reported for some metallic interfaces and for several topological insulators.

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Recent progress on measurement of spin–charge interconversion in topological insulators using ferromagnetic resonance

Cited by 9 publications

References 132 publications

Fermi Surface Topology and Rashba‐Edelstein Charge‐Spin Conversion in Lead‐Halide Perovskites

Fermi Surface Topology and Rashba‐Edelstein Charge‐Spin Conversion in Lead‐Halide Perovskites

Theory of spin and orbital Edelstein effects

Efficient Spin‐to‐Charge Interconversion in Weyl Semimetal TaP at Room Temperature

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