Ultrafast Dynamics of Intrinsic Anomalous Hall Effect in the Topological Antiferromagnet Mn3Sn

Abstract

We investigate ultrafast dynamics of the anomalous Hall effect (AHE) in the topological antiferromagnet Mn3Sn with sub-100 fs time resolution. Optical pulse excitations largely elevate the electron temperature up to 700 K, and terahertz probe pulses clearly resolves ultrafast suppression of the AHE before demagnetization. The result is well reproduced by microscopic calculation of the intrinsic Berry-curvature mechanism while the extrinsic contribution is clearly excluded. Our work opens a new avenue for the study of nonequilibrium AHE to identify the microscopic origin by drastic control of the electron temperature by light.

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Cited by in corpus (7)

• Observation of Terahertz Spin Hall Conductivity Spectrum in GaAs with Optical Spin Injection
• Photoconductive receivers at 1030 nm for high average power pulsed THz detection
• Nonlinear optical responses in superconductors under magnetic fields: quantum geometry and topological superconductivity
• On the angular dependence of anomalous Hall current
• Light-induced inverse spin Hall effect and field-induced circular photogalvanic effect in GaAs revealed by two-dimensional terahertz Fourier analysis
• Optical conductivity and orbital magnetization of Floquet vortex states
• Research on topological materials using ultrafast spectroscopy