Néel Spin-Orbit Torque in Antiferromagnetic Quantum Spin and Anomalous Hall Insulators
arXiv:2410.21751 · doi:10.1038/s41467-025-63171-1
Abstract
Interplay between magnetic ordering and topological electrons not only enables new topological phases but also underpins electrical control of magnetism. Here we extend the Kane-Mele model to include the exchange coupling to a collinear background antiferromagnetic (AFM) order, which can describe transition metal trichalcogenides. Owing to the spin-orbit coupling and staggered on-site potential, the system could exhibit the quantum anomalous Hall and quantum spin Hall effects in the absence of a net magnetization. Besides the chiral edge states, these topological phases support a staggered Edelstein effect through which an applied electric field can generate opposite non-equilibrium spins on the two AFM sublattices, realizing the Néel-type spin-orbit torque (NSOT). Contrary to known NSOTs in AFM metals driven by conduction currents, our NSOT arises from pure adiabatic currents devoid of Joule heating, while being a bulk effect not carried by the edge currents. By virtue of the NSOT, the electric field of a microwave can drive the AFM dynamics with a remarkably high efficiency. Compared to the ordinary AFM resonance driven by the magnetic field, the new mechanism can enhance the resonance amplitude by more than one order of magnitude and the absorption rate of the microwave power by over two orders of magnitude. Our findings unravel an incredible way to exploit AFM topological phases to achieve ultrafast magnetic dynamics.
References in corpus (36)
- Quantum Spin Hall Effect in Graphene
- Topological Order and the Quantum Spin Hall Effect
- Berry Phase Effects on Electronic Properties
- Magnetic-field-induced quantized anomalous Hall effect in intrinsic magnetic topological insulator MnBiTe
- Spin Transfer Torque Generated by the Topological Insulator Bi_2Se_3
- Kwant: a software package for quantum transport
- Prediction and observation of the first antiferromagnetic topological insulator
- Intrinsic magnetic topological insulators in van der Waals layered MnBiTe-family materials
- Topological axion states in magnetic insulator MnBiTe with the quantized magnetoelectric effect
- Robust axion insulator and Chern insulator phases in a two-dimensional antiferromagnetic topological insulator
- The Quantum Spin Hall Effect: Theory and Experiment
- Experimental realization of an intrinsic magnetic topological insulator
- Quantum Spin Hall Effect and Topologically Invariant Chern Numbers
- Unique thickness-dependent properties of the van der Waals interlayer antiferromagnet films
- Relativistic Neel-order fields induced by electrical current in antiferromagnets
- Colloquium: Quantum anomalous Hall effect
- Writing and Reading antiferromagnetic MnAu: Néel spin-orbit torques and large anisotropic magnetoresistance
- Strong Rashba-Edelstein Effect-Induced Spin-Orbit Torques in Monolayer Transition-Metal Dichalcogenide/Ferromagnet Bilayers
- Intrinsic magnetic topological insulator phases in the Sb doped MnBi2Te4 bulks and thin flakes
- Nondissipative Spin Hall Effect via Quantized Edge Transport
- Spin-flop transition in atomically thin MnPS crystals
- Antiferromagnetic ordering in van der Waals two-dimensional magnetic material MnPS3 probed by Raman spectroscopy
- Intertwined Topological and Magnetic Orders in Atomically Thin Chern Insulator MnBi2Te4
- Influence of a Transport Current on Magnetic Anisotropy in Gyrotropic Ferromagnets
- Even-Odd Layer-Dependent Anomalous Hall Effect in Topological Magnet MnBi2Te4 Thin Films
- Imaging of current induced Néel vector switching in antiferromagnetic MnAu
- Intrinsic Nonlinear Spin Magnetoelectricity in Centrosymmetric Magnets
- Mixed Weyl semimetals and dissipationless magnetization control in insulators by spin-orbit torques
- Nonlinear terahertz Néel spin-orbit torques in antiferromagnetic MnAu
- Néel Spin Orbit Torque driven antiferromagnetic resonance in MnAu probed by time-domain THz spectroscopy
- Topological electric driving of magnetization dynamics in insulators
- Spin-orbit torques in a Rashba honeycomb antiferromagnet
- Quantum Anomalous Hall Effect in Perfectly Compensated Collinear Antiferromagnetic Thin Films
- Lossless Spin-Orbit Torque in Antiferromagnetic Topological Insulator MnBiTe
- Voltage-driven exchange resonance achieving 100\% mechanical efficiency
- Geometric Dynamics of Magnetization: Electronic Contribution