Spin-orbit interaction induced in graphene by transition metal dichalcogenides

Wakamura, Taro; Reale, Fabrizio; Palczynski, Pawel; Zhao, Meng‐Qiang; Johnson, A. T. Charlie; Guéron, S.; Mattevi, Cecilia; Ouerghi, Abdelkarim; Bouchiat, H.

doi:10.1103/physrevb.99.245402

Cited by 66 publications

(78 citation statements)

References 90 publications

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“…We chose to use monolayer WSe 2 in particular because of its large band gap 17 that allows applying a large range of gate voltages. It has also been suggested previously that a monolayer induces larger spin-orbit coupling in graphene compared to a few-layer WSe 2 18 .…”

mentioning

confidence: 58%

Superconductivity in metallic twisted bilayer graphene stabilized by WSe2

Arora

Polski

Zhang

et al. 2020

Nature

287

179

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mentioning

confidence: 58%

Superconductivity in metallic twisted bilayer graphene stabilized by WSe2

Arora

Polski

Zhang

et al. 2020

Nature

287

179

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“…These formulas could provide a direct way to measure local intrinsic sublattice-resolved spin-orbit coupling as well as the local sublattice potential by means of Landaulevel scanning tunneling spectroscopy [17][18][19]. Importantly, this would also provide a direct way to determine whether the intrinsic spin-orbit coupling in proximitized heterostructures is of uniform [32] or valley Zeeman type [33,34], differentiating between topologically trivial and nontrivial regimes. These regimes can also be identified by the number of crossings of the low-energy Landau levels in the fan diagram as well as from their electron-hole symmetry.…”

Section: Introductionmentioning

confidence: 99%

Landau levels in spin-orbit coupling proximitized graphene: Bulk states

Frank

Fabian

2020

Phys. Rev. B

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We study the magnetic-field dependence of Landau levels in graphene proximitized by large spin-orbit coupling materials, such as transition-metal dichalcogenides or topological insulators. In addition to the Rashba coupling, two types of intrinsic spin-orbit interactions, uniform (Kane-Mele type) and staggered (valley Zeeman type), are included to resolve their interplay with magnetic orbital effects. Employing a continuum model approach, we derive analytic expressions for low-energy Landau levels, which can be used to extract local orbital and spin-orbit coupling parameters from scanning probe spectroscopy experiments. We compare different parameter regimes to identify fingerprints of relative and absolute magnitudes of intrinsic spin-orbit coupling in the spectra. The inverted band structure of graphene proximitized by WSe 2 leads to an interesting crossing of Landau states across the bulk gap at a crossover field, providing insights into the size of Rashba spin-orbit coupling. Landau-level spectroscopy can help to resolve the type and signs of the intrinsic spin-orbit coupling by analyzing the symmetry in energy and number of crossings in the Landau fan chart. Finally, our results suggest that the strong response to the magnetic field of Dirac electrons in proximitized graphene can be associated with extremely large self-rotating magnetic moments.

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“…At the same time, future theoretical investigations can mine the best combinations that can guide further experiments. Interface spin texture is key to promoting specific phonon spectrum, doping level, and engineering distinct textures through atomic layer twists 137 and proximity induced spin-orbit coupling [138][139][140][141] . For instance, the recent magic-angle bilayer graphene with induced unconventional superconductivity 142 , suggests new feasibility of 2D superconductor-ferromagnet interfaces for superconducting spintronics 143 .…”

Section: Discussionmentioning

confidence: 99%

Two-dimensional van der Waals spinterfaces and magnetic-interfaces

Dayen

Ray

Karis

et al. 2020

Applied Physics Reviews

117

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Two-dimensional (2D) materials have brought fresh prospects for spintronics, as evidenced by the rapid scientific progress made in this frontier over the past decade. In particular, for charge perpendicular to plane vertical magnetic tunnel junctions, the 2D crystals present exclusive features such as atomic-level thickness control, near-perfect crystallography without dangling bonds, and novel electronic structure-guided interfaces with tunable hybridization and proximity effects, which lead to an entirely new group of spinterfaces. Such crystals also present new ways of integration of atomically thin barriers in magnetic tunnel junctions and an unprecedented means for developing composite barriers with atomic precision. All these new aspects have sparked interest for theoretical and experimental efforts, revealing intriguing spin-dependent transport and spin inversion effects. Here, we discuss some of the distinctive effects observed in ferromagnetic junctions with prominent 2D crystals such as graphene, hexagonal boron nitride, and transition metal dichalcogenides and how spinterface phenomena at such junctions affect the observed magnetoresistance in devices. Finally, we discuss how the recently emerged 2D ferromagnets bring upon an entirely novel category of van der Waals interfaces for efficient spin transmission and dynamic control through exotic heterostructures.

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Spin-orbit interaction induced in graphene by transition metal dichalcogenides

Cited by 66 publications

References 90 publications

Superconductivity in metallic twisted bilayer graphene stabilized by WSe2

Superconductivity in metallic twisted bilayer graphene stabilized by WSe2

Landau levels in spin-orbit coupling proximitized graphene: Bulk states

Two-dimensional van der Waals spinterfaces and magnetic-interfaces

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