Proximity effects in bilayer graphene on monolayer WSe${}_2$: Field-effect spin-valley locking, spin-orbit valve, and spin transistor

Abstract

Proximity orbital and spin-orbit effects of bilayer graphene on monolayer WSe${}_2$ are investigated from first-principles. We find that the built-in electric field induces an orbital band gap of about 10 meV in bilayer graphene. Remarkably, the proximity spin-orbit splitting for holes is two orders of magnitude---the spin-orbit splitting of the valence band at K is about 2 meV---more than for electrons. Effectively, holes experience spin-valley locking due to the strong proximity of the lower graphene layer to WSe${}_2$. However, applying an external transverse electric field of some 1 V/nm, countering the built-in field of the heterostructure, completely reverses this effect and allows, instead for holes, electrons to be spin-valley locked with 2 meV spin-orbit splitting. Such a behavior constitutes a highly efficient field-effect spin-orbit valve, making bilayer graphene on WSe${}_2$ a potential platform for a field-effect spin transistor.

arXiv comment8 pages, 8 figures

References in corpus (40)

• Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
• Spintronics: Fundamentals and applications
• Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
• $Z_2$ Topological Order and the Quantum Spin Hall Effect
• Quantum Spin Hall Insulator State in HgTe Quantum Wells
• Landau level degeneracy and quantum Hall effect in a graphite bilayer
• Observation of giant bandgap renormalization and excitonic effects in a monolayer transition metal dichalcogenide semiconductor
• Gate-induced insulating state in bilayer graphene devices
• Graphene Spintronics
• Observation of Electron-Hole Puddles in Graphene Using a Scanning Single Electron Transistor
• Nonvolatile Memory Cells Based on MoS2/Graphene Heterostructures
• Semiconductor Spintronics
• Quantum Anomalous Hall Effect in Graphene from Rashba and Exchange Effects
• Band-structure topologies of graphene: spin-orbit coupling effects from first principles
• Picosecond photoresponse in van der Waals heterostructures
• Spin-Orbit Proximity Effect in Graphene
• Impurity induced spin-orbit coupling in graphene
• Spontaneous Quantum Hall States in Chirally-stacked Few-Layer Graphene Systems
• Quantum Anomalous Hall Effect in Graphene Proximity Coupled to an Antiferromagnetic Insulator
• Strong interface-induced spin-orbit coupling in graphene on WS2
• Edge states in Graphene: from gapped flat band to gapless chiral modes
• Graphene on transition-metal dichalcogenides: a platform for proximity spin-orbit physics and optospintronics
• Electrically tunable quantum anomalous Hall effect in 5d transition-metal adatoms on graphene
• Electronic properties of bilayer and multilayer graphene
• Trivial and inverted Dirac bands, and emergence of quantum spin Hall states in graphene on transition-metal dichalcogenides
• Opto-Valleytronic Spin Injection in Monolayer MoS2/Few-Layer Graphene Hybrid Spin Valves
• Controlling spin relaxation in hexagonal BN-encapsulated graphene with a transverse electric field
• Spin-orbit coupling in hydrogenated graphene
• Origin and magnitude of 'designer' spin-orbit interaction in graphene on semiconducting transition metal dichalcogenides
• Tunable spin-orbit coupling and symmetry-protected edge states in graphene/WS${}_2$
• Band offset and negative compressibility in graphene-MoS2 heterostructures
• Microscopic Polarization in Bilayer Graphene
• Theory of spin-orbit coupling in bilayer graphene
• Performance of a spin-based insulated gate field effect transistor
• High On/Off Ratios in Bilayer Graphene Field Effect Transistors Realized by Surface Dopants
• 24 \textmu m length spin relaxation length in boron nitride encapsulated bilayer graphene
• MoS2: a Choice Substrate for Accessing and Tuning the Electronic Properties of Graphene
• Graphene-WS${}_2$ heterostructures for tunable spin injection and spin transport
• Quantum spin Hall states in graphene interacting with WS${}_2$ or WSe${}_2$
• Spin transport in fully hexagonal boron nitride encapsulated graphene

Cited by in corpus (99)

• Van der Waals heterostructures for spintronics and opto-spintronics
• Colloquium: Spintronics in graphene and other two-dimensional materials
• 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
• Spin-orbit driven band inversion in bilayer graphene by van der Waals proximity effect
• Spin-Orbit Enhanced Superconductivity in Bernal Bilayer Graphene
• Spin transport in graphene/transition metal dichalcogenide heterostructures
• Large spin relaxation anisotropy and valley-Zeeman spin-orbit coupling in WSe2/Gr/hBN heterostructures
• Spin-orbit driven ferromagnetism at half moiré filling in magic-angle twisted bilayer graphene
• First-principles investigation of graphene/MoS2 bilayer heterostructures using Tkatchenko-Scheffler van der Waals method
• Large Quantum Anomalous Hall Effect in Spin-Orbit Proximitized Rhombohedral Graphene
• Twist-angle dependent proximity induced spin-orbit coupling in graphene/transition-metal dichalcogenide heterostructures
• Superconductivity and correlated phases in non-twisted bilayer and trilayer graphene
• Tunable superconductivity in electron- and hole-doped Bernal bilayer graphene
• Quantum Hall Effect Measurement of Spin-Orbit Coupling Strengths in Ultraclean Bilayer Graphene/WSe2 Heterostructures
• Superconductivity and quantized anomalous Hall in rhombohedral graphene
• Electrical control of valley-Zeeman spin-orbit coupling-induced spin precession at room temperature
• Strong and Tunable Spin Lifetime Anisotropy in Dual-Gated Bilayer Graphene
• Observation of the spin-orbit gap in bilayer graphene by one-dimensional ballistic transport
• Effect of distance on photoluminescence quenching and proximity-induced spin-orbit coupling in graphene-WSe2 heterostructures
• On-Demand Spin-Orbit Interaction from Which-Layer Tunability in Bilayer Graphene
• Transport spectroscopy of ultraclean tunable band gaps in bilayer graphene
• Gate tunability of highly efficient spin-to-charge conversion by spin Hall effect in graphene proximitized with WSe${}_2$
• Electrically tunable exchange splitting in bilayer graphene on monolayer Cr${}_2$X${}_2$Te${}_6$ with X=Ge, Si, and Sn
• Swapping Exchange and Spin-Orbit Coupling in 2D van der Waals Heterostructures
• Particle-hole symmetry protects spin-valley blockade in graphene quantum dots
• Spin transport in high-mobility graphene on WS${}_2$ substrate with electric-field tunable proximity spin-orbit interaction
• Enhanced superconductivity through virtual tunneling in Bernal bilayer graphene coupled to WSe${}_2$
• Majorana and parafermion corner states from two coupled sheets of bilayer graphene
• Electrical control of spin and valley in spin-orbit coupled graphene multilayers
• Correlated Phases in Spin-Orbit-Coupled Rhombohedral Trilayer Graphene
• Ballistic transport spectroscopy of spin-orbit-coupled bands in monolayer graphene on WSe${}_2$
• Proximity induced spin orbit effects in graphene on Au
• Electric-field-tunable valley Zeeman effect in bilayer graphene heterostructures: Realization of the spin-orbit valve effect
• Counterintuitive gate dependence of weak antilocalization in bilayer graphene/WSe${}_2$ heterostructures
• Spin Hall Effect in Bilayer Graphene Combined with an Insulator up to Room Temperature
• Bilayer graphene encapsulated within monolayers of WS${}_2$ or Cr${}_2$Ge${}_2$Te${}_6$: Tunable proximity spin-orbit or exchange coupling
• Effective Interactions in a Graphene Layer Induced by the Proximity to a Ferromagnet
• Heterostructures of graphene and topological insulators Bi${}_2$Se${}_3$, Bi${}_2$Te${}_3$, and Sb${}_2$Te${}_3$
• Spin-orbit proximity in MoS${}_2$/bilayer graphene heterostructures
• Proximity spin-orbit and exchange coupling in ABA and ABC trilayer graphene van der Waals heterostructures
• Guiding Robust Valley-dependent Edge States by Surface Acoustic Waves
• Superconductivity and spin canting in spin-orbit proximitized rhombohedral trilayer graphene
• Gate-Defined Topological Josephson Junctions in Bernal Bilayer Graphene
• Single and bilayer graphene on the topological insulator Bi${}_2$Se${}_3$: Electronic and spin-orbit properties from first principles
• Experimental observation of spin-split energy dispersion in high-mobility single-layer graphene/WSe2 heterostructures
• Chirality-induced spin texture switching in twisted bilayer graphene
• Spin Manipulation by Giant Valley-Zeeman Spin-Orbit Field in Atom-Thick WSe2
• Proximity-induced topological phases in bilayer graphene
• Van der Waals heterostructures with spin-orbit coupling
• Twist-angle dependent proximity induced spin-orbit coupling in graphene/topological insulator heterostructures
• Observation of Time-Reversal Invariant Helical Edge-Modes in Bilayer Graphene/WSe${}_2$ Heterostructure
• Spin-orbit and exchange proximity couplings in graphene/1T-TaS${}_2$ heterostructure triggered by a charge density wave
• Large spin-relaxation anisotropy in bilayer-graphene/WS${}_2$ heterostructures
• Giant Spin Lifetime Anisotropy and Spin-Valley Locking in Silicene and Germanene from First-Principles Density-Matrix Dynamics
• Band Gap Opening in Bilayer Graphene-CrCl${}_3$/CrBr${}_3$/CrI${}_3$ van der Waals Interfaces
• Spin-polarized currents in corrugated graphene nanoribbons
• Ultralong 100 ns Spin Relaxation Time in Graphite at Room Temperature
• Symmetry-broken metallic orders in spin-orbit-coupled Bernal bilayer graphene
• Modeling the Oblique Spin Precession in Lateral Spin Valves for Accurate Determination of Spin Lifetime Anisotropy: Effect of Finite Contact Resistance and Channel Length
• Proximity induced spin-orbit splitting in graphene nanoribbons on transition metal dichalcogenides
• Giant asymmetric proximity-induced spin-orbit coupling in twisted graphene/SnTe heterostructure
• Charge-spin conversion signal in WTe2 van der Waals hybrid devices with a geometrical design
• Impact of competing energy scales on the shell-filling sequence in elliptic bilayer graphene quantum dots
• Proximity-enhanced valley Zeeman splitting at the WS${}_2$/graphene interface
• Layer-Dependent Quantum Anomalous Hall Effect in Rhombohedral Graphene
• Valley polarization, magnetization, and superconductivity in bilayer graphene near the van Hove singularity
• Giant Valley-Polarized Spin Splittings in Magnetized Janus Pt Dichalcogenides
• Stabilizing the inverted phase of a WSe${}_2$/BLG/WSe${}_2$ heterostructure via hydrostatic pressure
• Inter-orbital Cooper pairing at finite energies in Rashba surface states
• Twisted bilayer graphene reveals its flat bands under spin pumping
• Proximity-induced spin-orbit coupling in phosphorene on a WSe${}_2$ monolayer
• Landau Levels of Bilayer Graphene in a WSe${}_2$/Bilayer Graphene van der Waals Heterostructure
• Tunable spin-orbit splitting in bilayer graphene/WSe${}_2$ quantum devices
• Spin Seebeck Effect in Graphene
• Hydrostatic pressure control of the spin-orbit proximity effect, spin relaxation, and thermoelectricity in a phosphorene-WSe${}_2$ heterostructure
• Weak Localisation Driven by Pseudospin-Spin Entanglement
• Proximity-enabled control of spin-orbit coupling in phosphorene symmetrically and asymmetrically encapsulated by WSe${}_2$ monolayers
• Electrostatic control of the trion fine structure in transition metal dichalcogenide monolayers
• Proximity Effect of Epitaxial Iron Phthalocyanine Molecules on High-Quality Graphene Devices
• Nonlinear analog spintronics with van der Waals heterostructures
• Spintronic Quantum Phase Transition in a $Graphene/P{b}_{0.24}S{n}_{0.76}Te$ Heterostructure with Giant Rashba Spin-Orbit Coupling
• Electric field tunable spin-orbit gap in a bilayer graphene/WSe${}_2$ quantum dot
• Ferroelectric switching control of spin current in graphene proximitized by In${}_2$Se${}_3$
• Weak localization as probe of spin-orbit-induced spin-split bands in bilayer graphene proximity coupled to WSe${}_2$
• Electronic and Spin-Orbit Properties of hBN Encapsulated Bilayer Graphene
• Angular dependence of the interlayer coupling at the interface between two dimensional materials 1T-PtSe${}_2$ and graphene
• Room-temperature spin-lifetime anisotropy exceeding 60 in bilayer graphene spin valves proximity coupled to WSe${}_2$
• Ultrafast Spin Injection in Graphene via Dynamical Carrier Filtering at Transition Metal Dichalcogenide Interfaces
• Increasing the proximity induced spin-orbit coupling in bilayer graphene/WSe${}_2$ heterostructures with pressure
• Reliability of spin-to-charge conversion measurements in graphene-based lateral spin valves
• Electric field tunable bands in doubly aligned bilayer graphene hBN moire superlattice
• Valley-Polarized Quantum Anomalous Hall Phase in Bilayer Graphene with Layer-Dependent Proximity Effects
• Tuning proximity-induced spin-orbit coupling in graphene/WSe${}_2$ heterostructures
• Spin-valley 0.7 anomaly in bilayer graphene/WSe${}_2$ quantum point contacts
• Spin-orbit-driven quarter semimetals in rhombohedral graphene
• Unprecedented Spin-Lifetime of Itinerant Electrons in Natural Graphite Crystals
• Gate and Carriers tunable Valley Imbalance in Topological Proximitized Rhombohedral Trilayer Graphene