Magnetized Topological Insulator Multilayers

Abstract

We discuss the magnetic and topological properties of bulk crystals and quasi-two-dimensional thin films formed by stacking intrinsic magnetized topological insulator ( for example Mn(Sb${}_x$Bi${}_{1-x}$)${}_2$X${}_4$ with X = Se,Te, including MnBi${}_2$Te${}_4$) septuple layers and topological insulator quintuple layers in arbitrary order. Our analysis makes use of a simplified model that retains only Dirac-cone degrees of freedom on both surfaces of each septuple or quintuple layer. We demonstrate the model's applicability and estimate its parameters by comparing with {\it ab initio } density-functional-theory(DFT) calculations. We then employ the coupled Dirac cone model to provide an explanation for the dependence of thin-film properties, particularly the presence or absence of the quantum anomalous Hall effect, on film thickness, magnetic configuration, and stacking arrangement, and to comment on the design of Weyl superlattices.

arXiv comment7+10 pages, 13 figures

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• Unique thickness-dependent properties of the van der Waals interlayer antiferromagnet $\mathrm{MnB}{\mathrm{i}}_2\mathrm{T}{\mathrm{e}}_4$ films
• Dynamical Axion Field in Topological Magnetic Insulators
• High-Chern-Number and High-Temperature Quantum Hall Effect without Landau Levels
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• Intrinsic magnetic topological insulator phases in the Sb doped MnBi2Te4 bulks and thin flakes
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Cited by in corpus (42)

• Colloquium: Quantum anomalous Hall effect
• Mn-rich MnSb2Te4: A topological insulator with magnetic gap closing at high Curie temperatures of 45-50 K
• Intrinsic magnetic topological insulators
• Electric field induced topological phase transition and large enhancements of spin-orbit coupling and Curie temperature in two-dimensional ferromagnetic semiconductors
• Topological magnetic materials of the (MnSb${}_2$Te${}_4$)$\cdot$(Sb${}_2$Te${}_3$)${}_n$ van der Waals compounds family
• Evolution of Magnetic Interactions in Sb-substituted MnBi2Te4
• Distinct magnetic gaps between antiferromagnetic and ferromagnetic orders driven by surface defects in the topological magnet MnBi2Te4
• Visualizing the interplay of Dirac mass gap and magnetism at nanoscale in intrinsic magnetic topological insulators
• Tunable dynamical magnetoelectric effect in antiferromagnetic topological insulator MnBi${}_2$Te${}_4$ films
• Magnetization-tuned topological quantum phase transition in MnBi2Te4 devices
• Gate-Tunable Quantum Anomalous Hall Effects in MnBi${}_2$Te${}_4$ Thin Films
• Metamagnetism of few layer topological antiferromagnets
• Intrinsic magnetic topological insulators of the MnBi${}_2$Te${}_4$ family
• Systemic Consequences of Disorder in Magnetically Self-Organized Topological MnBi${}_2$Te${}_4/$(Bi${}_2$Te${}_3$)${}_n$ Superlattices
• Magnetic field-controlled lattice thermal conductivity in MnBi2Te4
• Topological magnetic textures in magnetic topological insulators
• Finite-size Topology
• Magnetic warping in topological insulators
• Axionic surface wave in dynamical axion insulators
• Kerr, Faraday, and Magnetoelectric Effects in MnBi${}_2$Te${}_4$ Thin Films
• Time-reversal-broken Weyl semimetal in the Hofstadter regime
• Quantum Anomalous Hall Effect in Perfectly Compensated Collinear Antiferromagnetic Thin Films
• Magnetic topological transistor exploiting layer-selective transport
• Facet dependent surface energy gap on magnetic topological insulators
• Miniband engineering and topological phase transitions in topological - normal insulator superlattices
• Electric and magnetic fields tuned spin-polarized topological phases in two-dimensional ferromagnetic MnBi${}_4$Te${}_7$
• Dirac Fermions and Topological Phases in Magnetic Topological Insulator Films
• Room temperature spin-orbit torque efficiency in sputtered low-temperature superconductor delta-TaN
• Symmetry-driven anisotropic coupling effect in antiferromagnetic topological insulator: Mechanism for high-Chern-number quantum anomalous Hall state
• Symmetry, topology, and geometry: The many faces of the topological magnetoelectric effect
• Capacitive scheme to detect the topological magnetoelectric effect
• Electrically tunable high-Chern-number quasiflat bands in twisted antiferromagnetic topological insulators
• Emergent topology in thin films of nodal line semimetals
• Quantum Transport and Magnetism of Dirac Electrons in Solids
• Reversing Neel Vector in PT-Antiferromagnets by Nonreciprocal Light Scattering
• Bulk versus surface: Nonuniversal partitioning of the topological magnetoelectric effect
• Spin-orbit torque switching of Néel order in band-inverted antiferromagnetic bilayer MnBi${}_2$Te${}_4$
• Vapor transport growth of MnBi2Te4 and related compounds
• Interplay between surface Dirac and Rashba states specific for topologically nontrivial van der Waals superlattices
• High Chern number phase in topological insulator multilayer structures: a Dirac cone model study
• Magnetic precession induced spin accumulation in collinear antiferromagnets
• Tuning the Topological Properties of the Antiferromagnetic V(Bi${}_{1-x}$Sb${}_x$)${}_2$Te${}_4$ via Sb concentration