Layer Control of Magneto-Optical Effects and Their Quantization in Spin-Valley Splitting Antiferromagnets

Abstract

Magneto-optical effects (MOE), interfacing the fundamental interplay between magnetism and light, have served as a powerful probe for magnetic order, band topology, and valley index. Here, based on multiferroic and topological bilayer antiferromagnets (AFMs), we propose a layer control of MOE (L-MOE), which is created and annihilated by layer-stacking or an electric field effect. The key character of L-MOE is the sign-reversible response controlled by ferroelectric polarization, the Neel vector, or the electric field direction. Moreover, the sign-reversible L-MOE can be quantized in topologically insulating AFMs. We reveal that the switchable L-MOE originates from the combined contributions of spin-conserving and spin-flip interband transitions in spin-valley splitting AFMs, a phenomenon not observed in conventional AFMs. Our findings bridge the ancient MOE to the emergent realms of layertronics, valleytronics, and multiferroics and may hold immense potential in these fields.

References in corpus (19)

• Topological Field Theory of Time-Reversal Invariant Insulators
• Coupling the valley degree of freedom to antiferromagnetic order
• Layer Hall effect in a 2D topological Axion antiferromagnet
• Gate-controllable magneto-optic Kerr effect in layered collinear antiferromagnets
• Spin-Valley Optical Selection Rule and Strong Circular Dichroism in Silicene
• Valley-related multiple Hall effect in single-layer VSi2P4
• Sign-reversible valley-dependent Berry phase effects in 2D valley-half-semiconductors
• Spin-order dependent anomalous Hall effect and magneto-optical effect in noncollinear antiferromagnets Mn${}_{3}X$N ($X$ = Ga, Zn, Ag, and Ni)
• Magnetism and Magneto-optical Effects in Bulk and Few-layer CrI${}_3$: A Theoretical GGA + U Study
• Comparing the anomalous Hall effect and the magneto-optical Kerr effect through antiferromagnetic phase transitions in Mn${}_3$Sn
• Strong magneto-optical and anomalous transport manifestations in two-dimensional van der Waals magnets Fe${}_n$GeTe${}_2$ ($n$ = 3, 4, 5)
• Tunable magneto-optical effect, anomalous Hall effect and anomalous Nernst effect in two-dimensional room-temperature ferromagnet $1T$-CrTe${}_2$
• Magneto-optical Kerr effect in ferroelectric antiferromagnetic two-dimensional heterostructures
• Universal Faraday rotation in HgTe wells with critical thickness
• Spin-resolved optical conductivity of two-dimensional group-VIB transition-metal dichalcogenides
• Magneto-optical Kerr effect and magnetoelasticity in weak ferromagnetic RuF${}_4$ monolayer
• Magneto-optic and transverse transport properties of non-collinear antiferromagnets
• Observation of flat and weakly dispersing bands in a van der Waals semiconductor Nb3Br8 with breathing kagome lattice
• Activating magnetoelectric optical properties by twisting antiferromagnetic bilayers