Spin photogalvanic effect in two-dimensional collinear antiferromagnets

Abstract

Spin photogalvanic effect (SPGE) is an efficient method to generate a spin current by photoexcitation in a contactless and ultra-fast way. In two-dimensional (2D) collinear antiferromagnetic (AFM) materials that preserve the combined time-reversal (T) and inversion (I) symmetry (i.e., TI symmetry), we find that the photogalvanic currents in two magnetic sublattices carry different kinds of spins and propagate in opposite direction if the spin-orbit coupling is negligible, resulting in a pure spin current without net charge current. Based on the first-principles calculations, we show that two experimentally synthesized 2D collinear AFM materials, monolayer MnPS${}_3$ and bilayer CrCl${}_3$, host the required symmetry and support sizable SPGE. The predicted SPGE in 2D collinear AFM materials makes them promising platforms for nano spintronics devices.

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• Bulk-Fermi-Arc Transition Induced Large Photogalvanic Effect in Weyl Semimetals
• Switchable Giant Bulk Photocurrents and Photo-spin-currents in Monolayer PT-symmetric Anti-ferromagnet MnPSe3
• Skin Effect of Nonlinear Optical Responses in Antiferromagnets
• Magnetic parity violation and parity-time-reversal-symmetric magnets
• TensorSymmetry: a package to get symmetry-adapted tensors disentangling spin-orbit coupling effect and establishing analytical relationship with magnetic order
• Laser-induced charge and spin photocurrents at BiAg${}_2$ surface: a first principles benchmark
• Dominant orbital magnetization in the prototypical altermagnet MnTe
• Photocurrents of charge and spin in single-layer Fe${}_3$GeTe${}_2$
• Quantization of spin circular photogalvanic effect in altermagnetic Weyl semimetals
• Change in Magnetic Order in NiPS3 Single Crystals Induced by a Molecular Intercalation