AC conductivity and magnetic dichroism of two-dimensional antiferromagnetic Dirac semimetals

Abstract

We investigate the magneto-optical properties of two-dimensional nonsymmorphic Dirac semimetals in the presence of antiferromagnetic order. Using the Kubo formula, we calculate the conductivity tensor of two-dimensional CuMnAs, a prototype antiferromagnetic Dirac material, as a function of light frequency. From the finite-frequency conductivity tensor, we derive the dynamic dielectric function and magnetic linear dichroism, demonstrating how they are influenced by the orientation of the N{é}el order parameter. Adjusting the N{é}el vector changes both the sign and amplitude of the system's magneto-optical response. We propose that magnetic linear dichroism spectroscopy is a powerful technique for determining the orientation of the N{é}el vector.

References in corpus (36)

• Topological insulators and superconductors
• Quantum Spin Hall Effect in Graphene
• Weyl and Dirac Semimetals in Three Dimensional Solids
• Antiferromagnetic spintronics
• Antiferromagnetic spintronics
• Dirac semimetal in three dimensions
• Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems
• Measurement of the Optical Conductivity of Graphene
• Electrical switching of an antiferromagnet
• Optical properties of graphene
• Spin-orbit gap of graphene: First-principles calculations
• Magneto-optical conductivity in Graphene
• Space-time dispersion of graphene conductivity
• Dirac Semimetals in Two Dimensions
• Relativistic Neel-order fields induced by electrical current in antiferromagnets
• Spin transfer and current-induced switching in antiferromagnets
• Dirac Fermions in Antiferromagnetic Semimetal
• Staggering antiferromagnetic domain wall velocity in a staggered spin-orbit field
• Staggered Dynamics in Antiferromagnets by Collective Coordinates
• Electric control of Dirac quasiparticles by spin-orbit torque in an antiferromagnet
• Electrically induced and detected Néel vector reversal in a collinear antiferromagnet
• Optical determination of the Neel vector in a CuMnAs thin-film antiferromagnet
• Anomalous Hall Effect in type-I Weyl metals
• Magnetism and Magneto-optical Effects in Bulk and Few-layer CrI${}_3$: A Theoretical GGA + U Study
• Fundamental bound on topological gap
• Tunable band topology and optical conductivity in altermagnets
• Nonsymmorphic Symmetry-Protected Band Crossings in a Square-Net Metal PtPb${}_4$
• Theory of light-induced effective magnetic field in Rashba ferromagnets
• Fluctuation-induced torque on a topological insulator out of thermal equilibrium
• Magneto-optical Kerr effect in spin split two-dimensional massive Dirac materials
• Large magneto-optical effect and magnetic anisotropy energy in two-dimensional metallic ferromagnet Fe${}_3$GeTe${}_2$
• Anisotropic magneto-optical absorption and linear dichroism in two-dimensional semi-Dirac electron systems
• Intrinsic staggered spin-orbit torque for the electrical control of antiferromagnets -- application to CrI${}_3$
• Frequency-dependent Faraday and Kerr rotation in anisotropic nonsymmorphic Dirac semimetals
• Magneto-optical conductivity of monolayer transition metal dichalcogenides in the presence of proximity-induced exchange interaction and external electrical field
• Photon Absorption of Two-dimensional Nonsymmorphic Dirac Semimetals