High-harmonic spectroscopy of light-driven nonlinear anisotropic anomalous Hall effect in a Weyl semimetal

Abstract

Weyl semimetals are promising quantum materials that offer unique topological properties. Lately, it has been shown that laser-driven electron dynamics have characteristic signatures in two-dimensional and three-dimensional Dirac semimetals. The transition from Dirac to Weyl semimetal requires the breaking of either inversion or time-reversal symmetry. The present work shows that the laser-driven electron dynamics in a Weyl semimetal with broken time-reversal symmetry has intriguing features in its high-harmonic spectrum. It is found that the parity and magnitude of the non-zero Berry curvature's components control the direction and strength of the anomalous current, which leads to the generation of the anomalous odd harmonics. We demonstrate that the non-trivial topology of the Berry curvature in time-reversal symmetry broken quantum materials can be probed by measuring the polarisation of the emitted anomalous odd harmonics. Our findings unequivocally illustrate that laser-driven electron dynamics leads to the generation of nonlinear anisotropic anomalous Hall effect in time-reversal symmetry broken quantum materials on an ultrafast timescale.

6 pages, 4 figures

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• All-Optical Ultrafast Valley Switching in Two-Dimensional Materials
• Role of topological charges in the nonlinear-optical response from Weyl semimetals
• Light-enhanced nonlinear Hall effect
• Photocurrent generation in solids via linearly polarized laser
• How massless are Weyl fermions in Weyl semimetals?
• Formation, stability, and highly nonlinear optical response of excitons to intense light fields interacting with two-dimensional materials
• High-harmonic generation in semi-Dirac and Weyl semimetals with broken time-reversal symmetry: Exploring merging of Weyl nodes
• Tailoring Photocurrent in Weyl Semimetals via Intense Laser Irradiation
• Optical Control of Ultrafast Photocurrent in Graphene
• Influence of chirp and carrier-envelope phase on non-integer high-harmonic generation
• Berry curvature and shift vector effects at high-order wave mixing in biased bilayer graphene
• High-order harmonic generations in tilted Weyl semimetals
• Population inversion and ultrafast terahertz nonlinearity of transient Dirac fermions in Cd${}_3$As${}_2$
• Nonlinear Hall effects with an exceptional ring
• Quantum Geometric Origin of the Intrinsic Nonlinear Hall Effect
• Terahertz third-harmonic generation of lightwave driven Weyl fermions far from equilibrium
• High-purity valley-polarized currents induced by bichromatic optical fields in two-dimensional materials
• Coherent suppression and dephasing-induced reentrance of high harmonics in gapped Dirac materials
• Strong Field Optical Hall Effect in 2D Weyl Semimetal
• Magneto-nonlinear Hall effect in time-reversal breaking system