Axion Insulator State with ferromagnetic ordering in CrI3/Bi2Se3/MnBi2Se4 Heterostructure

Abstract

Realizing axion insulator state with a uniform magnetization considerably facilitates experimental explorations of the intriguing topological magnetoelectric effect, a hallmark of three-dimensional (3D) topological insulators (TIs). Through density functional theory calculations and four-band model studies, we find that magnetic ions Cr3+ in monolayer CrI3 and Mn2+ in septuple-layer MnBi2Se4 have opposite exchange couplings to the topological surface states of 3D TI Bi2Se3. As an exciting result of such opposite exchange couplings, axion insulator state is realized by a uniform magnetization in CrI3/Bi2Se3/MnBi2Se4 heterostructure. Our work opens up opportunities for exploring topological magnetoelectric effect realized by the uniform magnetization induced axion insulator state in heterostructures of 3D TIs and two-dimensional van der Waals ferromagnetic insulators.

12 pages, 4 figures

References in corpus (17)

• 2D materials and van der Waals heterostructures
• Topological Field Theory of Time-Reversal Invariant Insulators
• Quantized Anomalous Hall Effect in Magnetic Topological Insulators
• Intrinsic magnetic topological insulators in van der Waals layered MnBi${}_2$Te${}_4$-family materials
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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
• Realization of the Axion Insulator State in Quantum Anomalous Hall Sandwich Heterostructures
• Intrinsic magnetic topological insulator phases in the Sb doped MnBi2Te4 bulks and thin flakes
• Highly-ordered wide bandgap materials for quantized anomalous Hall and magnetoelectric effects
• Tailoring tricolor structure of magnetic topological insulator for robust axion insulator
• Surfaces of Axion Insulators
• Symmetry Enforced Chiral Hinge States and Surface Quantum Anomalous Hall Effect in Magnetic Axion Insulator ${\text{Bi}}_{2-x}{\text{Sm}}_x{\text{Se}}_3$
• Large-gap magnetic topological heterostructure formed by subsurface incorporation of a ferromagnetic layer
• Magnetize Topological Surface States of Bi2Se3 with a CrI3 Monolayer
• Prediction of Weyl semimetal, AFM topological insulator, nodal line semimetal, and Chern insulator phases in Bi2MnSe4
• Axion Insulator State in a Ferromagnet/Topological Insulator/Antiferromagnet Heterostructure
• Geometric and nongeometric contributions to the surface anomalous Hall conductivity

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• Magnetic Anisotropy in Two-dimensional van der Waals Magnetic Materials and Their Heterostructures: Importance, Mechanisms, and Opportunities
• Alloying V in MnBi${}_2$Te${}_4$ for Robust Ferromagnetic Coupling and Quantum Anomalous Hall Effect
• Intertwined non-trivial band topology and giant Rashba spin splitting
• Co-existence of Topological Non-trivial and Spin Gapless Semiconducting Behavior in MnPO${}_4$: A Composite Quantum Compound
• Electric and magnetic fields tuned spin-polarized topological phases in two-dimensional ferromagnetic MnBi${}_4$Te${}_7$
• Tunable corner states in topological insulators with long-range hoppings and diverse shapes