Intrinsic Nonlinear Hall Detection of the Néel Vector for Two-Dimensional Antiferromagnetic Spintronics

Abstract

The respective unique merit of antiferromagnets and two-dimensional (2D) materials in spintronic applications inspire us to exploit 2D antiferromagnetic spintronics. However, the detection of the Néel vector in 2D antiferromagnets remains a great challenge because the measured signals usually decrease significantly in the 2D limit. Here we propose that the Néel vector of 2D antiferromagnets can be efficiently detected by the intrinsic nonlinear Hall (INH) effect which exhibits unexpected significant signals. As a specific example, we show that the INH conductivity of the monolayer manganese chalcogenides Mn$X$ ($X$=S, Se, Te) can reach the order of nm$\cdot$mA/V${}^2$, which is orders of magnitude larger than experimental values of paradigmatic antiferromagnetic spintronic materials. The INH effect can be accurately controlled by shifting the chemical potential around the band edge, which is experimentally feasible via electric gating or charge doping. Moreover, we explicitly demonstrate its $2\pi$-periodic dependence on the Néel vector orientation based on an effective $k.p$ model. Our findings enable flexible design schemes and promising material platforms for spintronic memory device applications based on 2D antiferromagnets.

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• Spin-Polarized Antiferromagnetic Spintronics
• Nonlinear Valley Hall Effect
• Spontaneous Anomalous Hall Effect in Two-Dimensional Altermagnets
• Scaling Law for Time-Reversal-Odd Nonlinear Transport
• Magnetic geometry induced quantum geometry and nonlinear transports
• Contrasting Light-Induced Spin Torque in Antiferromagnetic and Altermagnetic Systems
• Planar Hall Plateau in Magnetic Weyl Semimetals
• Bulk Photovoltaic Effects in Helimagnets
• Intrinsic nonlinear Hall effect in two-dimensional honeycomb topological antiferromagnets
• Magnon Nonlinear Hall Effect in 2D Antiferromagnetic Insulators
• Proper Definition of Intrinsic Nonlinear Current
• Intrinsic Orbital Origin for the Chirality-Dependent Nonlinear Planar Hall Effect of Topological Nodal Fermions in Chiral Crystals
• Geometrical Nonlinear Hall Effect Induced by Lorentz Force
• Quantum Geometric Origin of the Intrinsic Nonlinear Hall Effect
• Quantum Metric-induced Oscillations in Flat Bands
• Two-Terminal Electrical Detection of the Néel Vector via Longitudinal Antiferromagnetic Nonreciprocal Transport
• C-type antiferromagnetic structure of topological semimetal CaMnSb${}_2$
• Reversing Neel Vector in PT-Antiferromagnets by Nonreciprocal Light Scattering
• Quantum geometry, localization, and topological bounds of spin fluctuations
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