Spin-Orbit Interaction Induced in Graphene by Transition-Metal Dichalcogenides

Abstract

We report a systematic study on strong enhancement of spin-orbit interaction (SOI) in graphene driven by transition-metal dichalcogenides (TMDs). Low temperature magnetotoransport measurements of graphene proximitized to different TMDs (monolayer and bulk WSe${}_2$, WS${}_2$ and monolayer MoS${}_2$) all exhibit weak antilocalization peaks, a signature of strong SOI induced in graphene. The amplitudes of the induced SOI are different for different materials and thickness, and we find that monolayer WSe${}_2$ and WS${}_2$ can induce much stronger SOI than bulk ones and also monolayer MoS${}_2$. The estimated spin-orbit (SO) scattering strength for the former reaches $\sim$ 10 meV whereas for the latter it is around 1 meV or less. We also discuss the symmetry and type of the induced SOI in detail, especially focusing on the identification of intrinsic and valley-Zeeman (VZ) SOI via the dominant spin relaxation mechanism. Our findings offer insight on the possible realization of the quantum spin Hall (QSH) state in graphene.

arXiv comment14 pages, 10 figures and 3 tables

References in corpus (58)

• Electric Field Effect in Atomically Thin Carbon Films
• Spintronics: Fundamentals and applications
• Van der Waals heterostructures
• Quantum Spin Hall Effect in Graphene
• $Z_2$ Topological Order and the Quantum Spin Hall Effect
• Layer-dependent Ferromagnetism in a van der Waals Crystal down to the Monolayer Limit
• Coupled spin and valley physics in monolayers of MoS2 and other group-VI dichalcogenides
• Discovery of intrinsic ferromagnetism in 2D van der Waals crystals
• Type-II Weyl Semimetals
• Quantum Spin Hall Effect and Topological Field Effect Transistor in Two-Dimensional Transition Metal Dichalcogenides
• Evidence of Ising pairing in superconducting NbSe${}_2$ atomic layers
• Weak localisation magnetoresistance and valley symmetry in graphene
• Two Dimensional Ising Superconductivity in Gated MoS${}_2$
• Strong suppression of weak (anti)localization in graphene
• Realization of Quantum Spin Hall State in Monolayer 1T'-WTe2
• Observation of the Quantum Spin Hall Effect up to 100 Kelvin in a Monolayer Crystal
• Band-structure topologies of graphene: spin-orbit coupling effects from first principles
• Prediction of the Weyl semimetal in the orthorhombic MoTe2
• Edge conduction in monolayer WTe2
• Superconductivity protected by spin-valley locking in ion-gated MoS2
• Spin-Orbit Proximity Effect in Graphene
• Impurity induced spin-orbit coupling in graphene
• Weak localisation in graphene flakes
• Large spin splitting in the conduction band of transition metal dichalcogenide monolayers
• Strong interface-induced spin-orbit coupling in graphene on WS2
• MoTe2: A Type-II Weyl Topological Metal
• Graphene for spintronics: giant Rashba splitting due to hybridization with Au
• Graphene on transition-metal dichalcogenides: a platform for proximity spin-orbit physics and optospintronics
• Weak antilocalization in epitaxial graphene: evidence for chiral electrons
• Spin-orbit coupling, quantum dots, and qubits in monolayer transition metal dichalcogenides
• Trivial and inverted Dirac bands, and emergence of quantum spin Hall states in graphene on transition-metal dichalcogenides
• Spin-Orbit-Mediated Spin Relaxation in Graphene
• Strongly anisotropic spin relaxation in graphene/transition metal dichalcogenide heterostructures at room temperature
• Long Distance Spin Transport in High Mobility Graphene on Hexagonal Boron Nitride
• Giant topological insulator gap in graphene with 5d adatoms
• Giant Spin Lifetime Anisotropy in Graphene Induced by Proximity Effects
• Large Proximity-Induced Spin Lifetime Anisotropy in Transition Metal Dichalcogenide/Graphene Heterostructures
• Spin transport in graphene/transition metal dichalcogenide heterostructures
• 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${}_2$
• Spin relaxation of conduction electrons
• Large spin relaxation anisotropy and valley-Zeeman spin-orbit coupling in WSe2/Gr/hBN heterostructures
• Strong electron-hole symmetric Rashba spin-orbit coupling in graphene/monolayer transition metal dichalcogenide heterostructures
• Twist-angle dependence of the proximity spin-orbit coupling in graphene on transition-metal dichalcogenides
• Optimal charge-to-spin conversion in graphene on transition metal dichalcogenides
• Elliot-Yafet mechanism in graphene
• Strong Spin-Orbit Interaction Induced in Graphene by Monolayer WS${}_2$
• z/-z Symmetry of spin-orbit coupling and weak localization in graphene
• Magnetotransport in heterostructures of transition metal dichalcogenides and graphene
• Protected pseudohelical edge states in proximity graphene ribbons and flakes
• Electronic band structure of Two-Dimensional WS2/Graphene van der Waals Heterostructures
• Strong spin-orbit interactions and weak antilocalization in carbon doped p-type GaAs heterostructures
• Spin Orbit Coupling in Graphene Induced by Heavy Adatoms with Electrons in the Outer-Shell $p$ Orbitals
• Microscopic Theory of Spin Relaxation Anisotropy in Graphene with Proximity-Induced Spin-Orbit Coupling
• Crystal-field effects in graphene with interface-induced spin-orbit coupling
• Measuring anisotropic spin relaxation in graphene
• Topological phases and twisting of graphene on a dichalcogenide monolayer
• Weak localization in transition metal dichalcogenide monolayers and their heterostructures with graphene

Cited by in corpus (31)

• Superconductivity without insulating states in twisted bilayer graphene stabilized by monolayer WSe${}_2$
• Gate tunability of highly efficient spin-to-charge conversion by spin Hall effect in graphene proximitized with WSe${}_2$
• Bilayer graphene encapsulated within monolayers of WS${}_2$ or Cr${}_2$Ge${}_2$Te${}_6$: Tunable proximity spin-orbit or exchange coupling
• Manipulation of Spin Transport in Graphene/Transition Metal Dichalcogenide Heterobilayers upon Twisting
• Spin-orbit proximity in MoS${}_2$/bilayer graphene heterostructures
• Transport measurements on van der Waals heterostructures under pressure
• Emergent correlated phases in rhombohedral trilayer graphene induced by proximity spin-orbit and exchange coupling
• Jacutingaite-family: a class of topological materials
• Gate-defined wires in twisted bilayer graphene: from electrical detection of inter-valley coherence to internally engineered Majorana modes
• Spin-orbit-enhanced robustness of supercurrent in graphene/WS${}_2$ Josephson junctions
• Perfect crossed Andreev reflection in the proximitized graphene/superconductor/proximitized graphene junctions
• Volkov-Pankratov states in topological graphene nanoribbons
• Observation of time-reversal symmetric Hall effect in graphene-WSe2 heterostructures at room temperature
• Swapping exchange and spin-orbit induced correlated phases in proximitized Bernal bilayer graphene
• Spin-valley dependent double Andreev reflections in the proximitized graphene/superconductor junction
• Collective spin modes in Fermi liquids with spin-orbit coupling
• Supercurrent mediated by helical edge modes in bilayer graphene
• Twisted bilayer graphene reveals its flat bands under spin pumping
• Unidirectional Rashba Spin Splitting in Single Layer WS${}_{2(1-x)}$Se${}_{2x}$ alloy
• Theory of weak localization in graphene with spin-orbit interaction
• Spin-valley Silin modes in graphene with substrate-induced spin-orbit coupling
• Enhancement of spin-orbit coupling and magnetic scattering in hydrogenated graphene
• Landau levels in spin-orbit coupling proximitized graphene: bulk states
• Robust propagating in-gap modes due to spin-orbit domain walls in graphene
• Spin-orbit interaction and snake states in graphene $p$-$n$ junctions
• Edge states in proximitized graphene ribbons and flakes in a perpendicular magnetic field: emergence of lone pseudohelical pairs and pure spin-current states
• Ultrafast Spin Injection in Graphene via Dynamical Carrier Filtering at Transition Metal Dichalcogenide Interfaces
• Boosting proximity spin orbit coupling in graphene/WSe${}_2$ heterostructures via hydrostatic pressure
• Moiré Folded Helical States at the Interfaces of Heterostructures
• Tuning proximity-induced spin-orbit coupling in graphene/WSe${}_2$ heterostructures
• Zero-field spin resonance in graphene with proximity-induced spin-orbit coupling