Light-induced Nonlinear Spin Hall Current in Single-layer WTe${}_2$

Abstract

In this theoretical investigation, we analyze light-induced nonlinear spin Hall currents in a gated single-layer 1T${}^{\prime }$-WTe${}_2$, flowing transversely to the incident laser polarization direction. Our study encompasses the exploration of the second and third-order rectified spin Hall currents using an effective low-energy Hamiltonian and employing Kubo's formalism. We extend our analysis to a wide frequency range spanning both transparent and absorbing regimes, investigating the influence of light frequency below and above the optical band gap. Additionally, we investigate the influence of an out-of-plane gate potential on the system, disrupting inversion symmetry and effectively manipulating both the strength and sign of nonlinear spin Hall responses. We predict a pronounced third-order spin Hall current relative to its second-order counterpart. The predicted nonlinear spin currents show strong anisotropic dependence on the laser polarization angle. The outcomes of our study contribute to a generalized framework for nonlinear response theory within the spin channel will impact the development of the emerging field of opto-spintronic.

16 pages, 6 figures

References in corpus (25)

• Quantum Spin Hall Effect and Topological Phase Transition in HgTe Quantum Wells
• Quantum Spin Hall Effect and Topological Field Effect Transistor in Two-Dimensional Transition Metal Dichalcogenides
• Band signatures for strong nonlinear Hall effect in bilayer WTe${}_2$
• The 2021 Quantum Materials Roadmap
• Berry curvature dipole senses topological transition in a moiré superlattice
• All-optical polarization and amplitude modulation of second-harmonic generation in atomically thin semiconductors
• Giant $c$-axis nonlinear anomalous Hall effect in T${}_d$-MoTe${}_2$ and WTe${}_2$
• Nonlinear spin current generation in noncentrosymmetric spin-orbit coupled systems
• Pure spin current from one-photon absorption of linearly polarized light in noncentrosymmetric semiconductors
• Current injection by coherent one- and two-photon excitation in graphene and its bilayer
• Resonant photovoltaic effect in doped magnetic semiconductors
• Second-order nonlinear optical effects of spin currents
• Pure spin photocurrents
• Deduction of Pure Spin Current from Spin Linear and Circular Photogalvanic Effect in Semiconductor Quantum Wells
• The Berry dipole photovoltaic demon and the thermodynamics of photo-current generation within the optical gap of metals
• Nonlinear Spin Currents
• Quantum Kinetic Theory of Nonlinear Optical Currents: Finite Fermi surface and Fermi sea contributions
• The Fermi-Dirac staircase occupation of Floquet bands and current rectification inside the optical gap of metals: a rigorous perspective
• Photocurrent induced by a bicircular light drive in centrosymmetric systems
• A comprehensive theory of second-order spin photocurrents
• Probing Electronic States in Monolayer Semiconductors through Static and Transient Third-Harmonic Spectroscopy
• Intrinsic Contribution to Non-linear Thermoelectric Effect
• Effects of relaxation on photovoltaic effect and possibility of photocurrent within transparent region
• Raman Photogalvanic Effect: photocurrent at inelastic light scattering
• Second Harmonic Helicity and Faraday Rotation in Gated Single-Layer 1T${}^{\prime }$-WTe${}_2$

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