Tailoring tricolor structure of magnetic topological insulator for robust axion insulator

Abstract

Exploration of novel electromagnetic phenomena is a subject of great interest in topological quantum materials. One of the unprecedented effects to be experimentally verified is topological magnetoelectric (TME) effect originating from an unusual coupling of electric and magnetic fields in materials. A magnetic heterostructure of topological insulator (TI) hosts such an exotic magnetoelectric coupling and can be expected to realize the TME effect as an axion insulator. Here we designed a magnetic TI with tricolor structure where a non-magnetic layer of (Bi, Sb)2Te3 is sandwiched by a soft ferromagnetic Cr-doped (Bi, Sb)2Te3 and a hard ferromagnetic V-doped (Bi, Sb)2Te3. Accompanied by the quantum anomalous Hall (QAH) effect, we observe zero Hall conductivity plateaus, which are a hallmark of the axion insulator state, in a wide range of magnetic field between the coercive fields of Cr- and V-doped layers. The resistance of the axion insulator state reaches as high as 10^9 ohm, leading to a gigantic magnetoresistance ratio exceeding 10,000,000% upon the transition from the QAH state. The tricolor structure of TI may not only be an ideal arena for the topologically distinct phenomena, but also provide magnetoresistive applications for advancing dissipationless topological electronics.

16 pages, 4 figures

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• Topological Field Theory of Time-Reversal Invariant Insulators
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Cited by in corpus (77)

• Colloquium: Quantum anomalous Hall effect
• Layer Hall effect in a 2D topological Axion antiferromagnet
• Axion Electrodynamics in Topological Materials
• Large Anomalous Hall Effect in Topological Insulators with Proximitized Ferromagnetic Insulators
• Coexistence of Surface Ferromagnetism and Gapless Topological State in MnBi${}_2$Te${}_4$
• Spectral signatures of the surface anomalous Hall effect in magnetic axion insulators
• Native Defects in Antiferromagnetic Topological Insulator MnBi${}_2$Te${}_4$
• Half-Quantized Hall Effect and Power Law Decay of Edge Current Distribution
• Multiple magnetic topological phases in bulk van der Waals crystal MnSb4Te7
• Using nonlocal surface transport to identify the axion insulator
• Topological Hall Effect in a Topological Insulator Interfaced with a Magnetic Insulator
• Any Axion Insulator Must be a Bulk Three-Dimensional Topological Insulator
• Routes to realize the axion-insulator phase in MnBi${}_2$Te${}_4$(Bi${}_2$Te${}_3$)${}_n$ family: a perspective
• Distinct magnetic gaps between antiferromagnetic and ferromagnetic orders driven by surface defects in the topological magnet MnBi2Te4
• Changes of Magnetism in a Magnetic Insulator due to Proximity to a Topological Insulator
• Progress and prospects in the quantum anomalous Hall effect
• Zero Magnetic Field Plateau Phase Transition in Higher Chern Number Quantum Anomalous Hall Insulators
• Delocalization Transition of Disordered Axion Insulator
• Light-induced half-quantized Hall effect and axion insulator
• Observation of superparamagnetism in coexistence with quantum anomalous Hall C=$\pm$1 and C=0 Chern states
• Hinged Quantum Spin-Hall Effect in Antiferromagnetic Topological Insulators
• Half-Quantized Helical Hinge Currents in Axion Insulators
• Electrically Controlled Anomalous Hall Effect and Orbital Magnetization in Topological Magnet MnBi2Te4
• Giant nonlocal edge conduction in the axion insulator state of MnBi2Te4
• Intrinsic magnetic topological insulators of the MnBi${}_2$Te${}_4$ family
• Fabrication-induced even-odd discrepancy of magnetotransport in few-layer MnBi${}_2$Te${}_4$
• Axion Insulator State in Hundred-Nanometer-Thick Magnetic Topological Insulator Sandwich Heterostructures
• Quasicrystalline second-order topological semimetals
• Reversed electromagnetic Vavilov-Čerenkov radiation in naturally existing magnetoelectric media
• Elucidating proximity magnetism through polarized neutron reflectometry and machine learning
• Surface Charge Induced Dirac Band Splitting in a Charge Density Wave Material (TaSe4)2I
• On the topological surface states of the intrinsic magnetic topological insulator Mn-Bi-Te family
• Even-Odd Layer-Dependent Exchange Bias Effect in MnBi2Te4 Chern Insulator Devices
• Observation of magnetism induced topological edge state in antiferromagnetic topological insulator MnBi4Te7
• Coexistence of Superconductivity and Antiferromagnetism in Topological Magnet MnBi2Te4 Films
• Dynamical Piezomagnetic Effect in Time-Reversal Invariant Weyl Semimetals with Axionic Charge-Density Waves
• Non-local sidewall response and deviation from exact quantization of the topological magnetoelectric effect in axion-insulator thin films
• Current scaling of the topological quantum phase transition between a quantum anomalous Hall insulator and a trivial insulator
• Modification of transition radiation by three-dimensional topological insulators
• Spectral features of magnetic domain walls on surface of 3D topological insulators
• High temperature, gate-free quantum anomalous Hall effect with an active capping layer
• Structurally and Chemically Compatible BiInSe3 Substrate for Topological Insulator Thin Films
• Momentum-inversion symmetry breaking on the Fermi surface of magnetic topological insulators
• Topological Magnetoelectric Response in Ferromagnetic Axion Insulators
• The Layer Hall Effect without External Electric Field
• A Dirac-fermion approach and its application to design high Chern numbers in magnetic topological insulator multilayers
• Long-Time Magnetic Relaxation in Antiferromagnetic Topological Material EuCd${}_2$As${}_2$
• On the half-quantized Hall conductance of massive surface electrons in magnetic topological insulator films
• Pseudo-gauge Fields in Dirac and Weyl Materials
• Ambi-chiral anomalous Hall effect in magnetically doped topological insulators
• Optical intersubband properties of a core-shell semiconductor-topological insulator quantum dot described by $\theta$-Electrodynamics
• Evidence for Half-Quantized Chiral Edge Current in a C = 1/2 Parity Anomaly State
• Electrical control of intrinsic nonlinear Hall effect in antiferromagnetic topological insulator sandwiches
• Three-Dimensional Quantum Anomalous Hall Effect in Magnetic Topological Insulator Trilayers of Hundred-Nanometer Thickness
• Dynamical magnetoelectric coupling in axion insulator thin films
• Strong spin-dephasing in a topological insulator - paramagnet heterostructure
• Vavilov-Cherenkov radiation for parallel motion in three-dimensional topological insulators
• Chiral edge state coupling theory of transport in quantum anomalous Hall insulators
• From classical to quantum regime of topological surface states via defect engineering
• Intrinsic antiferromagnetic topological insulator and axion state in V2WS4
• Dissipative Edge Transport in Disordered Axion Insulator Films
• Planar magnetic texture on the surface of a topological insulator
• Axion insulator, Weyl points, quantum anomalous Hall effect and magnetic topological phase transition in Eu3In2As4
• Gate-tunable magnetoresistance in six-septuple-layer MnBi${}_2$Te${}_4$
• Magneto-optical effects of an artificially-layered ferromagnetic topological insulator with T${}_C$ of 160 K
• Chiral edge transport along domain walls in magnetic topological insulator nanoribbons
• Direct visualization of edge state in even-layer MnBi2Te4 at zero magnetic field
• Magnetic interactions of 4$f$ electrons in the topological insulator chalcogenide Bi${}_2$Se${}_3$
• Giant Spin Transport Anisotropy in Magnetic Topological Insulators
• Spectroscopic footprints of quantum friction in nonreciprocal and chiral media
• Emergent Weyl-like points in periodically modulated systems
• Procedures for assessing the stability of proposed topological materials
• Interlayer Exchange Coupling-Induced Critical-Metal-to-Insulator Phase Transition in Quantum Anomalous Hall Insulators
• Phase equilibria in MnSb2Te4-GeSb2Te4 system and magnetic properties of Mn1-xGexSb2Te4 solid solutions
• High Chern number phase in topological insulator multilayer structures: a Dirac cone model study
• Effects of GaAs Buffer Layer on Structural, Magnetic, and Transport Properties of Magnetic Topological Insulators Cr${}_y$(Bi${}_x$Sb${}_{1-x}$)${}_{2-y}$Te${}_3$ and V${}_y$(Bi${}_x$Sb${}_{1-x}$)${}_{2-y}$Te${}_3$ Films
• Sb doping effect on transport behavior in the topological insulator Bi2Se3