Large spin relaxation anisotropy and valley-Zeeman spin-orbit coupling in WSe2/Gr/hBN heterostructures

Abstract

Large spin-orbital proximity effects have been predicted in graphene interfaced with a transition metal dichalcogenide layer. Whereas clear evidence for an enhanced spin-orbit coupling has been found at large carrier densities, the type of spin-orbit coupling and its relaxation mechanism remained unknown. We show for the first time an increased spin-orbit coupling close to the charge neutrality point in graphene, where topological states are expected to appear. Single layer graphene encapsulated between the transition metal dichalcogenide WSe${}_2$ and hBN is found to exhibit exceptional quality with mobilities as high as 100000 cm^2/V/s. At the same time clear weak anti-localization indicates strong spin-orbit coupling and a large spin relaxation anisotropy due to the presence of a dominating symmetric spin-orbit coupling is found. Doping dependent measurements show that the spin relaxation of the in-plane spins is largely dominated by a valley-Zeeman spin-orbit coupling and that the intrinsic spin-orbit coupling plays a minor role in spin relaxation. The strong spin-valley coupling opens new possibilities in exploring spin and valley degree of freedom in graphene with the realization of new concepts in spin manipulation.

References in corpus (17)

• Graphene Spintronics
• Weak localisation magnetoresistance and valley symmetry in graphene
• Proximity-induced ferromagnetism in graphene revealed by anomalous Hall effect
• Weak localisation in graphene flakes
• Fast pick up technique for high quality heterostructures of bilayer graphene and hexagonal boron nitride
• Strongly anisotropic spin relaxation in graphene/transition metal dichalcogenide heterostructures at room temperature
• Large Proximity-Induced Spin Lifetime Anisotropy in Transition Metal Dichalcogenide/Graphene Heterostructures
• Tunable spin-orbit coupling and symmetry-protected edge states in graphene/WS${}_2$
• Proximity effects in bilayer graphene on monolayer WSe${}_2$: Field-effect spin-valley locking, spin-orbit valve, and spin transistor
• Strong electron-hole symmetric Rashba spin-orbit coupling in graphene/monolayer transition metal dichalcogenide heterostructures
• Spin Hall effect and Weak Antilocalization in Graphene/Transition Metal Dichalcogenide Heterostructures
• Magnetotransport in heterostructures of transition metal dichalcogenides and graphene
• On-Demand Spin-Orbit Interaction from Which-Layer Tunability in Bilayer Graphene
• Nanosecond spin relaxation times in single layer graphene spin valves with hexagonal boron nitride tunnel barriers
• Quantum Hall Effect in Graphene with Interface-Induced Spin-Orbit Coupling
• Dry transfer of CVD graphene using MoS${}_2$-based stamps
• Conductance fluctuations in quasi-two-dimensional systems: a practical view

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