Gate-Tunable Reversible Rashba-Edelstein Effect in a Few-Layer Graphene/2H-TaS2 Heterostructure at Room Temperature

Abstract

We report the observation of current-induced spin polarization, the Rashba-Edelstein effect (REE), and its Onsager reciprocal phenomenon, the spin galvanic effect (SGE), in a few-layer graphene/2H-TaS2 heterostructure at room temperature. Spin-sensitive electrical measurements unveil full spin-polarization reversal by an applied gate voltage. The observed gate-tunable charge-to-spin conversion is explained by the ideal work function mismatch between 2H-TaS2 and graphene, which allows strong interface-induced Bychkov-Rashba interaction with a spin-gap reaching 70 meV, while keeping the Dirac nature of the spectrum intact across electron and hole sectors. The reversible electrical generation and control of the nonequilibrium spin polarization vector, not previously observed in a nonmagnetic material, are elegant manifestations of emergent 2D Dirac fermions with robust spin-helical structure. Our experimental findings, supported by first-principles relativistic electronic structure and transport calculations, demonstrate a route to design low-power spin-logic circuits from layered materials.

Main text (24 pages, 4 figures) + supplementary material (29 pages, 15 figures). Experimental data for Onsager-reciprocal effect (SGE) added. Title, abstract, main text, references and SM updated

References in corpus (51)

• Spintronics: Fundamentals and applications
• Maximally-localized generalized Wannier functions for composite energy bands
• Van der Waals density functionals applied to solids
• Wannier90: A Tool for Obtaining Maximally-Localised Wannier Functions
• Doping graphene with metal contacts
• Electronic spin transport and spin precession in single graphene layers at room temperature
• Graphene Spintronics
• The electronic properties of bilayer graphene
• Room Temperature Reversible Spin Hall Effect
• Emergent Phenomena Induced by Spin-Orbit Coupling at Surfaces and Interfaces
• Giant Faraday rotation in single- and multilayer graphene
• Spin-Orbit Proximity Effect in Graphene
• Highly efficient and tuneable spin-to-charge conversion through Rashba coupling at oxide interfaces
• Stacking-Dependent Band Gap and Quantum Transport in Trilayer Graphene
• Colloquium: Spintronics in graphene and other two-dimensional materials
• Tunneling Spin Injection into Single Layer Graphene
• Tunneling Spin Injection into Single Layer Graphene (Supplementary Information)
• Strong interface-induced spin-orbit coupling in graphene on WS2
• Fermi level dependent charge-to-spin current conversion by Dirac surface state of topological insulators
• Inverse Edelstein Effect
• Graphene with Structure-Induced Spin-Orbit Coupling: Spin-Polarized States, Spin Zero Modes, and Quantum Hall Effect
• Room temperature spin Hall effect in graphene/MoS${}_2$ van der Waals heterostructures
• Strongly anisotropic spin relaxation in graphene/transition metal dichalcogenide heterostructures at room temperature
• Charge-to-Spin Conversion by the Rashba-Edelstein Effect in 2D van der Waals Heterostructures up to Room Temperature
• Evolution of the spin Hall effect in Pt nanowires: Size and temperature effects
• Opto-Valleytronic Spin Injection in Monolayer MoS2/Few-Layer Graphene Hybrid Spin Valves
• Large Proximity-Induced Spin Lifetime Anisotropy in Transition Metal Dichalcogenide/Graphene Heterostructures
• Spin transport in graphene/transition metal dichalcogenide heterostructures
• Model spin-orbit coupling Hamiltonians for graphene systems
• Tunable room-temperature spin galvanic and spin Hall effects in van der Waals heterostructures
• Observation of Inverse Edelstein Effect in Rashba-Split 2DEG between SrTiO3 and LaAlO3 at Room Temperature
• Origin and magnitude of 'designer' spin-orbit interaction in graphene on semiconducting transition metal dichalcogenides
• Nanosecond spin lifetimes in single- and few-layer graphene-hBN heterostructures at room temperature
• Rashba-Edelstein Magnetoresistance in Metallic Heterostructure
• Intrinsic spin-orbit coupling gap and the evidence of a topological state in graphene
• Enhanced Superconductivity and Suppression of Charge-density Wave Order in 2H-TaS${}_2$ in the Two-dimensional Limit
• Optimal charge-to-spin conversion in graphene on transition metal dichalcogenides
• The quantum scattering time and its implications on scattering sources in graphene
• The quantum scattering time and its implications on scattering sources in graphene (Supplementary)
• Extrinsic spin Hall effect induced by resonant skew scattering in graphene
• Pseudospin-driven spin relaxation mechanism in graphene
• Observation of Spin Hall Effect in Weyl Semimetal WTe2 at Room Temperature
• Excitation Energy Dependent Raman Signatures of ABA- and ABC-stacked Few-layer Graphene
• Optospintronics in graphene via proximity coupling
• Comparison between charge and spin transport in few layer graphene
• Strong and Tunable Spin Lifetime Anisotropy in Dual-Gated Bilayer Graphene
• Observation of spin-valley coupling induced large spin lifetime anisotropy in bilayer graphene
• Covariant conservation laws and the spin Hall effect in Dirac-Rashba systems
• Quantum Diagrammatic Theory of the Extrinsic Spin Hall Effect in Graphene
• Direct coupling between charge current and spin polarization by extrinsic mechanisms in graphene
• All-electrical creation and control of giant spin-galvanic effect in 1T-MoTe2/graphene heterostructures at room temperature

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