Current-induced spin polarization in topological insulator-graphene heterostructures

Abstract

Further development of the field of all-electric spintronics requires the successful integration of spin transport channels with spin injector/generator elements. While with the advent of graphene and related 2D materials high performance spin channel materials are available, the use of nanostructured spin generators remains a major challenge. Especially promising for the latter purpose are 3D topological insulators, whose 2D surface states host massless Dirac fermions with spin-momentum locking. Here, we demonstrate injection of spin-polarized current from a topological insulator into graphene, enabled by its intimate coupling to an ultrathin Bi2Te2Se nanoplatelet within a van der Waals epitaxial heterostructure. The spin switching signal, whose magnitude scales inversely with temperature, is detectable up to ~15 K. Our findings establish topological insulators as prospective future components of spintronic devices wherein spin manipulation is achieved by purely electrical means.

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Cited by in corpus (26)

• Emergent Phenomena Induced by Spin-Orbit Coupling at Surfaces and Interfaces
• Strongly anisotropic spin relaxation in graphene/transition metal dichalcogenide heterostructures at room temperature
• Unconventional charge-spin conversion in Weyl-semimetal WTe2
• Magnetization Dynamics of Nanoscale Magnetic Materials: A Perspective
• Spin Proximity Effects in Graphene/Topological Insulator Heterostructures
• Switching of Charge-Current-Induced Spin Polarization in the Topological Insulator BiSbTeSe2
• Giant Edelstein effect in Topological-Insulator--Graphene heterostructures
• Large room temperature spin-to-charge conversion signals in a few-layer graphene/Pt lateral heterostructure
• Two-Dimensional Spintronic Circuit Architectures on Large Scale Graphene
• Electrically Controlled Spin Injection from Giant Rashba Spin-Orbit Conductor BiTeBr
• Heterostructures of graphene and topological insulators Bi${}_2$Se${}_3$, Bi${}_2$Te${}_3$, and Sb${}_2$Te${}_3$
• Magic angle conditions for twisted 3D topological insulators
• Evidence for topological proximity effect in graphene coupled to topological insulator
• Proximity-Induced Spin-Orbit Coupling in Graphene-Bi${}_{1.5}$Sb${}_{0.5}$Te${}_{1.7}$Se${}_{1.3}$ Heterostructures
• High density carriers at a strongly coupled graphene-topological insulator interface
• Topological insulator spin transistor
• Berry curvature-induced local spin polarisation in gated graphene/WTe${}_2$ heterostructures
• Electrical detection of spin-polarized current in topological insulator Bi1.5Sb0.5Te1.7Se1.3
• Charge-spin conversion signal in WTe2 van der Waals hybrid devices with a geometrical design
• Room temperature nonlocal detection of charge-spin interconversion in a topological insulator
• Signature of pressure-induced topological phase transition in ZrTe${}_5$
• Theory of Spin Injection in Two-dimensional Metals with Proximity-Induced Spin-Orbit Coupling
• Electrical spin injection into graphene from a topological insulator in a van der Waals heterostructure
• The influence of anisotropic Rashba spin-orbit coupling on current-induced spin polarization in graphene
• Kondo enhancement of current induced spin accumulation in a quantum dot
• Controlling helicity-dependent photocurrent in polycrystalline Sb${}_2$Te${}_2$Se topological insulator thin films at ambient temperature through wave-vector of and photothermal gradient due to polarized light