Controlling spin relaxation in hexagonal BN-encapsulated graphene with a transverse electric field

Abstract

We experimentally study the electronic spin transport in hBN encapsulated single layer graphene nonlocal spin valves. The use of top and bottom gates allows us to control the carrier density and the electric field independently. The spin relaxation times in our devices range up to 2 ns with spin relaxation lengths exceeding 12 $\mu$m even at room temperature. We obtain that the ratio of the spin relaxation time for spins pointing out-of-plane to spins in-plane is ${\tau }_{\perp }/{\tau }_{||}\approx$ 0.75 for zero applied perpendicular electric field. By tuning the electric field this anisotropy changes to $\approx$0.65 at 0.7 V/nm, in agreement with an electric field tunable in-plane Rashba spin-orbit coupling.

References in corpus (23)

• Quantum Spin Hall Effect in Graphene
• Intrinsic and Rashba Spin-orbit Interactions in Graphene Sheets
• Spin-orbit coupling in curved graphene, fullerenes, nanotubes, and nanotube caps
• Semiconductor Spintronics
• Band-structure topologies of graphene: spin-orbit coupling effects from first principles
• Highly efficient spin transport in epitaxial graphene on SiC
• Fast pick up technique for high quality heterostructures of bilayer graphene and hexagonal boron nitride
• Spin Relaxation in Single Layer and Bilayer Graphene
• Spin-Orbit-Mediated Spin Relaxation in Graphene
• Observation of Long Spin Relaxation Times in Bilayer Graphene at Room Temperature
• Graphene with Structure-Induced Spin-Orbit Coupling: Spin-Polarized States, Spin Zero Modes, and Quantum Hall Effect
• Electron spin relaxation in graphene: the role of the substrate
• Long Distance Spin Transport in High Mobility Graphene on Hexagonal Boron Nitride
• Anisotropic spin relaxation in graphene
• Electronic spin transport in graphene field effect transistors
• Spin relaxation mechanism in graphene: resonant scattering by magnetic impurities
• Spin transport in high quality suspended graphene devices
• Theory of spin-orbit coupling in bilayer graphene
• Elliot-Yafet mechanism in graphene
• Electron spin relaxation in graphene with random Rashba field: Comparison of D'yakonov-Perel' and Elliott-Yafet--like mechanisms
• Spin dephasing and pumping in graphene due to random spin-orbit interaction
• Enhancement of spin relaxation time in hydrogenated graphene spin valve devices
• Spin Relaxation in Single Layer Graphene with Tunable Mobility

Cited by in corpus (88)

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• Colloquium: Spintronics in graphene and other two-dimensional materials
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• Spin lifetimes exceeding 12 nanoseconds in graphene non-local spin valve devices
• Perspectives for Spintronics in 2D Materials
• Opto-Valleytronic Spin Injection in Monolayer MoS2/Few-Layer Graphene Hybrid Spin Valves
• Spin transport in graphene/transition metal dichalcogenide heterostructures
• 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
• Proximity effects in bilayer graphene on monolayer WSe${}_2$: Field-effect spin-valley locking, spin-orbit valve, and spin transistor
• Proximity induced room-temperature ferromagnetism in graphene probed with spin currents
• Determination of the spin-lifetime anisotropy in graphene using oblique spin precession
• 24 \textmu m length spin relaxation length in boron nitride encapsulated bilayer graphene
• Spin Transport in Hydrogenated Graphene
• Spin Dynamics and Relaxation in Graphene Dictated by Electron-hole Puddles
• Gate-controlled reversible rectifying behaviour in tunnel contacted atomically-thin MoS${}_2$ transistor
• Strong modulation of spin currents in bilayer graphene by static and fluctuating proximity exchange fields
• Spin Hall Effect and Origins of Nonlocal Resistance in Adatom-Decorated Graphene
• Electrical spin injection, transport, and detection in graphene-hexagonal boron nitride van der Waals heterostructures: progress and perspectives
• Strong and Tunable Spin Lifetime Anisotropy in Dual-Gated Bilayer Graphene
• Observation of spin-valley coupling induced large spin lifetime anisotropy in bilayer graphene
• Experimental Demonstration of XOR Operation in Graphene Magnetologic Gates at Room Temperature
• Heterostructures of graphene and hBN: electronic, spin-orbit, and spin relaxation properties from first principles
• 98% directional guiding of spin currents with 90 micrometer relaxation length in bilayer graphene using carrier drift
• Limitations to Carrier Mobility and Phase-Coherent Transport in Bilayer Graphene
• Effects of Dephasing on Spin Lifetime in Ballistic Spin-Orbit Materials
• Voltage-controlled inversion of tunnel magnetoresistance in epitaxial Nickel/Graphene/MgO/Cobalt junctions
• Nanosecond spin relaxation times in single layer graphene spin valves with hexagonal boron nitride tunnel barriers
• Spin transport in fully hexagonal boron nitride encapsulated graphene
• Two-dimensional flexible high diffusive spin circuits
• Revisiting the measurement of the spin relaxation time in graphene-based devices
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• Spin transport in high-mobility graphene on WS${}_2$ substrate with electric-field tunable proximity spin-orbit interaction
• Suppression of contact-induced spin dephasing in graphene/MgO/Co spin-valve devices by successive oxygen treatments
• Electronic Spin Transport in Dual-Gated Bilayer Graphene
• Twist Angle Controlled Collinear Edelstein Effect in van der Waals Heterostructures
• Direct Observation of Unusual Interfacial Dzyaloshinskii-Moriya Interaction in Graphene/NiFe/Ta Heterostructure
• Graphene on two-dimensional hexagonal BN, AlN, and GaN: Electronic, spin-orbit, and spin relaxation properties
• Spin Hall Effect in Bilayer Graphene Combined with an Insulator up to Room Temperature
• Nonlocal Spin Dynamics in the Crossover from Diffusive to Ballistic Transport
• Contact-induced charge contributions to non-local spin transport measurements in Co/MgO/graphene devices
• Resonant scattering by magnetic impurities as a model for spin relaxation in bilayer graphene
• Measuring anisotropic spin relaxation in graphene
• Observation of spin-charge conversion in CVD-grown single-layer graphene
• Spin transport in two-layer-CVD-hBN/graphene/hBN heterostructures
• Anisotropic Hanle lineshape via anisotropic magnetothermoelectric phenomena
• Spontaneous Valley Spirals in Magnetically Encapsulated Twisted Bilayer Graphene
• Theory of spin-orbit induced spin relaxation in functionalized graphene
• Origin of Contact Resistance at Ferromagnetic Metal-Graphene Interfaces
• Spin Manipulation in Graphene by Chemically-Induced Sublattice Pseudospin Polarization
• Spin relaxation in corrugated graphene
• Large spin-relaxation anisotropy in bilayer-graphene/WS${}_2$ heterostructures
• Spin transport in graphene nanostructures
• Proximity-Induced Spin-Orbit Coupling in Graphene-Bi${}_{1.5}$Sb${}_{0.5}$Te${}_{1.7}$Se${}_{1.3}$ Heterostructures
• Ultralong spin lifetime in light alkali atom doped graphene
• Scaling behavior of spin transport in hydrogenated graphene
• Electron spin dynamics of two-dimensional layered materials
• Dry-transferred CVD graphene for inverted spin valve devices
• Giant Spin Lifetime Anisotropy and Spin-Valley Locking in Silicene and Germanene from First-Principles Density-Matrix Dynamics
• Independent geometrical control of spin and charge resistances in curved spintronics
• Room-temperature superparamagnetism due to giant magnetic anisotropy in Mo${}_S$ defected single-layer MoS${}_2$
• Spin and charge transport in graphene-based spin transport devices with Co/MgO spin injection and spin detection electrodes
• Electric fields and substrates dramatically accelerate spin relaxation in graphene
• Efficient spin injection into graphene through trilayer hBN tunnel barriers
• Modeling the Oblique Spin Precession in Lateral Spin Valves for Accurate Determination of Spin Lifetime Anisotropy: Effect of Finite Contact Resistance and Channel Length
• Temperature and electric field dependence of spin relaxation in graphene on SrTiO${}_3$
• Charge transfer due to defects in hexagonal boron nitride/graphene heterostructures: an ab initio study
• Spin Relaxation at Graphene Nanoribbons in the presence of Substrate Surface Roughness
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• Spin Relaxation in Graphene with self-assembled Cobalt Porphyrin Molecules
• Simulations on the influence of spatially-varying spin transport parameters on the measured spin lifetime in graphene non-local spin valves
• Plasmon Excitations for Encapsulated Graphene
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• Impact of tunnel barrier strength on magnetoresistance in carbon nanotubes
• Circuit-Model Analysis for Spintronic Devices with Chiral Molecules as Spin Injectors
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• Gate-voltage response of a one-dimensional ballistic spin valve without spin-orbit interaction
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