Competing magnetic interactions in the antiferromagnetic topological insulator MnBi${}_2$Te${}_4$

Abstract

The antiferromagnetic (AF) compound MnBi${}_2$Te${}_4$ is suggested to be the first realization of an antiferromagnetic (AF) topological insulator. Here we report on inelastic neutron scattering studies of the magnetic interactions in MnBi${}_2$Te${}_4$ that possess ferromagnetic (FM) triangular layers with AF interlayer coupling. The spin waves display a large spin gap and pairwise exchange interactions within the triangular layer are frustrated due to large next-nearest neighbor AF exchange. The degree of frustration suggests proximity to a variety of magnetic phases, potentially including skyrmion phases, that could be accessed in chemically tuned compounds or upon the application of symmetry-breaking fields.

5 pages, 4 figures

References in corpus (19)

• Experimental Observation of the Quantum Anomalous Hall Effect in a Magnetic Topological Insulator
• Magnetic-field-induced quantized anomalous Hall effect in intrinsic magnetic topological insulator MnBi${}_2$Te${}_4$
• Prediction and observation of the first antiferromagnetic topological insulator
• High-precision realization of robust quantum anomalous Hall state in a hard ferromagnetic topological insulator
• Topological axion states in magnetic insulator MnBi${}_2$Te${}_4$ with the quantized magnetoelectric effect
• Experimental realization of an intrinsic magnetic topological insulator
• Antiferromagnetic topological insulators
• Unique thickness-dependent properties of the van der Waals interlayer antiferromagnet $\mathrm{MnB}{\mathrm{i}}_2\mathrm{T}{\mathrm{e}}_4$ films
• Multiply periodic states and isolated skyrmions in an anisotropic frustrated magnet
• Crystal and Magnetic Structures in Layered, Transition Metal Dihalides and Trihalides
• Gapless surface Dirac cone in antiferromagnetic topological insulator MnBi${}_2$Te${}_4$
• Crystal growth and magnetic structure of MnBi2Te4
• Spin scattering and noncollinear spin structure-induced intrinsic anomalous Hall effect in antiferromagnetic topological insulator $\mathrm{MnB}{\mathrm{i}}_2\mathrm{T}{\mathrm{e}}_4$
• Highly-ordered wide bandgap materials for quantized anomalous Hall and magnetoelectric effects
• Gapless Dirac surface states in the antiferromagnetic topological insulator MnBi2Te4
• Evolution of structural, magnetic and transport properties in MnBi2-xSbxTe4
• Competing rhombohedral and monoclinic crystal structures in Mn$P{n}_{2}C{h}_4$ compounds: an {\em ab-initio} study
• Determination of the exchange anisotropy in perovskite antiferromagnets using powder inelastic neutron scattering
• Two dimensional ordering and collective magnetic excitations in the dilute ferromagnetic topological insulator (Bi${}_{0.95}$Mn${}_{0.05}$)${}_2$Te${}_3$

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