Nanosecond spin lifetimes in single- and few-layer graphene-hBN heterostructures at room temperature

Abstract

We present a new fabrication method of graphene spin-valve devices which yields enhanced spin and charge transport properties by improving both the electrode-to-graphene and graphene-to-substrate interface. First, we prepare Co/MgO spin injection electrodes onto Si${}^{++}$/SiO${}_2$. Thereafter, we mechanically transfer a graphene-hBN heterostructure onto the prepatterned electrodes. We show that room temperature spin transport in single-, bi- and trilayer graphene devices exhibit nanosecond spin lifetimes with spin diffusion lengths reaching 10$\mu$m combined with carrier mobilities exceeding 20,000 cm${}^2$/Vs.

15 pages, 5 figures

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Cited by in corpus (24)

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• Nanosecond spin relaxation times in single layer graphene spin valves with hexagonal boron nitride tunnel barriers
• Large-scale BN tunnel barriers for graphene spintronics
• Giant proximity exchange and valley splitting in transition metal dichalcogenide/$h\mathrm{BN}$/(Co, Ni) heterostructures
• Electrically Controlled Spin Injection from Giant Rashba Spin-Orbit Conductor BiTeBr
• Room temperature manipulation of long lifetime spins in metallic-like carbon nanospheres
• 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
• Contact-induced charge contributions to non-local spin transport measurements in Co/MgO/graphene devices
• Spin transport in graphene nanostructures
• Charge carrier density-dependent Raman spectra of graphene encapsulated in hexagonal boron nitride
• Ultralong spin lifetime in light alkali atom doped graphene
• Electron spin dynamics of two-dimensional layered materials
• Dry-transferred CVD graphene for inverted spin valve devices
• Spintronics in 2D graphene-based van der Waals heterostructures
• Spin Relaxation at Graphene Nanoribbons in the presence of Substrate Surface Roughness
• Charge-induced artifacts in non-local spin transport measurements: How to prevent spurious voltage signals
• Spin imaging of Poiseuille flow of viscous electronic fluid
• Electric field tunable spin-orbit gap in a bilayer graphene/WSe${}_2$ quantum dot
• Spin drag mechanism of giant thermal magnetoresistance
• Spin-caloric resistance of Dirac plasma in a graphene Corbino device
• Pre-Patterned Superconducting Contacts for Clean Superconductor-Topological Material Interfaces Enabling Long-Range Josephson Coupling