Symmetry, spin-texture, and tunable quantum geometry in a WTe${}_2$ monolayer

Abstract

The spin orientation of electronic wavefunctions in crystals is an internal degree of freedom, typically insensitive to electrical knobs. We argue from a general symmetry analysis and a $\vec{k}\cdot \vec{p}$ perspective, that monolayer 1T'-WTe${}_2$ possesses a gate-activated canted spin texture that produces an electrically tunable bulk band quantum geometry. In particular, we find that due to its out-of-plane asymmetry, an applied out-of-plane electric field breaks inversion symmetry to induce both in-plane and out-of-plane electric dipoles. These in-turn generate spin-orbit coupling to lift the spin degeneracy and enable a bulk band Berry curvature and magnetic moment distribution to develop. Further, due to its low symmetry, Berry curvature and magnetic moment in 1T'-WTe${}_2$ possess a dipolar distribution in momentum space, and can lead to unconventional effects such as a current induced magnetization and quantum non-linear anomalous Hall effect. These render 1T'-WTe${}_2$ a rich two-dimensional platform for all-electrical control over quantum geometric effects.

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• Giant $c$-axis nonlinear anomalous Hall effect in T${}_d$-MoTe${}_2$ and WTe${}_2$
• Ferroelectric nonlinear anomalous Hall effect in few-layer WTe${}_2$
• Layer-dependent spin-orbit torques generated by the centrosymmetric transition metal dichalcogenide $\beta$-MoTe${}_2$
• Topological Semimetal Nanostructures: From Properties to Topotronics
• Nonlinear transport in Weyl semimetals induced by Berry curvature dipole
• Canted Spin Texture and Quantum Spin Hall Effect in WTe2
• Tunable large Berry dipole in strained twisted bilayer graphene
• Topological Nonlinear Anomalous Nersnt Effect in Strained Transition Metal Dichalcogenides
• Magnus Hall Effect
• Geometric photon-drag effect and nonlinear shift current in centrosymmetric crystals
• Non-linear Nernst effect in bilayer WTe${}_2$
• Probing quantum criticality using nonlinear Hall effect in a metallic Dirac system
• Spin-orbit-parity coupled superconductivity in topological monolayer WTe${}_2$
• The influence of lattice termination on the edge states of the quantum spin Hall insulator monolayer $1T^{\prime }$-WTe${}_2$
• Gate-tunable flat bands in van der Waals patterned dielectric superlattices
• Engineering transistor-like optical gain in two-dimensional materials with Berry curvature dipoles
• Determination of the spin axis in quantum spin Hall insulator monolayer WTe2
• Gate-Tunable Berry Curvature Dipole Polarizability in Dirac Semimetal Cd3As2
• Low-symmetry topological materials for large charge-to-spin interconversion: The case of transition metal dichalcogenide monolayers
• Determination of the spin orientation of helical electrons in monolayer WTe2
• High-efficiency energy harvesting based on nonlinear Hall rectifier
• Interaction-Enhanced Topological Hall Effects in Strained Twisted Bilayer Graphene
• Photo-induced anomalous Hall effect in the type-II Weyl-semimetal WTe2 at room-temperature
• Quantum Oscillation of Thermally Activated Conductivity in a Monolayer WTe${}_2$-like Excitonic Insulator
• Orbitronics in Two-dimensional Materials
• Orbital Edelstein effect from density-wave order
• Non-linear ballistic response of quantum spin-Hall edge states
• Quantum nonlinear planar Hall effect in bilayer graphene: an orbital effect of a steady in-plane magnetic field
• Hinge Spin Polarization in Magnetic Topological Insulators Revealed by Resistance Switch
• Second Harmonic Helicity and Faraday Rotation in Gated Single-Layer 1T${}^{\prime }$-WTe${}_2$
• Theory of Glide Symmetry Protected Helical Edge States in WTe${}_2$ Monolayer
• Cooperative orbital moments and edge magnetoresistance in monolayer WTe${}_2$
• Non-linear magnon transport in a bilayer van der Waals antiferromagnets
• Topological Superconductivity in Monolayer T${}_{\text{d}}$-MoTe${}_2$
• Low-energy effective theory and anomalous Hall effect in monolayer ${\mathrm{WTe}}_2$
• Nonlinear spin and orbital Edelstein effect in WTe2
• Inverse Ising effect and Ising magnetoresistance
• Canalized hyperbolic magnetoexciton polaritons enabled by the Shubnikov-de Haas effect in van der Waals semiconductors
• Photonic spin Hall effect dependent on Landau level transitions in monolayer WTe2
• Nonequilibrium Green's function approach to multi-band Cooper-pair transport: linear magnetoresistance effect due to nonunitary superconductivity
• Topological electronic states and thermoelectric transport at phase boundaries in single-layer WSe${}_2$: An effective Hamiltonian theory
• Direct observation of the layer-number-dependent electronic structure in few-layer WTe2