Odd-even layer-number effect and layer-dependent magnetic phase diagrams in MnBi2Te4

Abstract

The intrinsic magnetic layered topological insulator MnBi2Te4 with nontrivial topological properties and magnetic order has become a promising system for exploring exotic quantum phenomena such as quantum anomalous Hall effect. However, the layer-dependent magnetism of MnBi2Te4, which is fundamental and crucial for further exploration of quantum phenomena in this system, remains elusive. Here, we use polar reflective magnetic circular dichroism spectroscopy, combined with theoretical calculations, to obtain an in-depth understanding of the layer-dependent magnetic properties in MnBi2Te4. The magnetic behavior of MnBi2Te4 exhibits evident odd-even layer-number effect, i.e. the oscillations of the coercivity of the hysteresis loop (at μ0Hc) and the spin-flop transition (at μ0H1), concerning the Zeeman energy and magnetic anisotropy energy. In the even-number septuple layers, an anomalous magnetic hysteresis loop is observed, which is attributed to the thickness-independent surface-related magnetization. Through the linear-chain model, we can clarify the odd-even effect of the spin-flop field and determine the evolution of magnetic states under the external magnetic field. The mean-field method also allows us to trace the experimentally observed magnetic phase diagrams to the magnetic fields, layer numbers and especially, temperature. Overall, by harnessing the unusual layer-dependent magnetic properties, our work paves the way for further study of quantum properties of MnBi2Te4.

arXiv comment46 pages, 16 figures

References in corpus (28)

• Topological Insulators
• Topological insulators and superconductors
• Layer-dependent Ferromagnetism in a van der Waals Crystal down to the Monolayer Limit
• Experimental Observation of the Quantum Anomalous Hall Effect in a Magnetic Topological Insulator
• Topological Field Theory of Time-Reversal Invariant Insulators
• Quantized Anomalous Hall Effect in Magnetic Topological Insulators
• Magnetic-field-induced quantized anomalous Hall effect in intrinsic magnetic topological insulator MnBi${}_2$Te${}_4$
• Two-Dimensional Itinerant Ising Ferromagnetism in Atomically thin Fe3GeTe2
• Prediction and observation of the first antiferromagnetic topological insulator
• Intrinsic magnetic topological insulators in van der Waals layered MnBi${}_2$Te${}_4$-family materials
• 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
• Robust axion insulator and Chern insulator phases in a two-dimensional antiferromagnetic topological insulator
• Universal mechanical exfoliation of large-area 2D crystals
• Experimental realization of an intrinsic magnetic topological insulator
• High-Chern-Number and High-Temperature Quantum Hall Effect without Landau Levels
• Realization of the Axion Insulator State in Quantum Anomalous Hall Sandwich Heterostructures
• Crystal growth and magnetic structure of MnBi2Te4
• Large magnetic gap at the Dirac point in a Mn-induced Bi${}_2$Te${}_3$ heterostructure
• Spin scattering and noncollinear spin structure-induced intrinsic anomalous Hall effect in antiferromagnetic topological insulator $\mathrm{MnB}{\mathrm{i}}_2\mathrm{T}{\mathrm{e}}_4$
• A van der Waals antiferromagnetic topological insulator with weak interlayer magnetic coupling
• Variety of magnetic topological phases in the (MnBi${}_2$Te${}_4$)(Bi${}_2$Te${}_3$)${}_m$ family
• Magnetic Proximity Effect as a Pathway to Spintronic Applications of Topological Insulators
• Determining the phase diagram of atomically thin layered antiferromagnet CrCl${}_3$
• Antiferromagnetic Topological Insulator MnBi2Te4: Synthesis and Magnetic properties
• Robust A-type order and spin-flop transition on the surface of the antiferromagnetic topological insulator MnBi${}_2$Te${}_4$
• Magnetic imaging of antiferromagnetic domain walls
• Meta-magnetism of weakly-coupled antiferromagnetic topological insulators

Cited by in corpus (45)

• Colloquium: Quantum anomalous Hall effect
• Quantum metric nonlinear Hall effect in a topological antiferromagnetic heterostructure
• Even-Odd Layer-Dependent Anomalous Hall Effect in Topological Magnet MnBi2Te4 Thin Films
• Intrinsic Nonlinear Spin Magnetoelectricity in Centrosymmetric Magnets
• Routes to realize the axion-insulator phase in MnBi${}_2$Te${}_4$(Bi${}_2$Te${}_3$)${}_n$ family: a perspective
• Antiferromagnetic Quantum Anomalous Hall Effect Modulated by Spin Flips and Flops
• Large Exchange Bias Effect and Coverage-Dependent Interfacial Coupling in CrI3/MnBi2Te4 van der Waals Heterostructures
• Progress and prospects in the quantum anomalous Hall effect
• Experimental evidence on the dissipationless transport of chiral edge state of the high-field Chern insulator in MnBi2Te4 nanodevices
• Quantum Imaging of Magnetic Phase Transitions and Spin Fluctuations in Intrinsic Magnetic Topological Nanoflakes
• Electrically Controlled Anomalous Hall Effect and Orbital Magnetization in Topological Magnet MnBi2Te4
• Real-time observation of magnetization and magnon dynamics in a two-dimensional topological antiferromagnet MnBi2Te4
• Metamagnetism of few layer topological antiferromagnets
• Orbital polarization and third-order anomalous Hall effect in WTe2
• On the topological surface states of the intrinsic magnetic topological insulator Mn-Bi-Te family
• Observation of magnetism induced topological edge state in antiferromagnetic topological insulator MnBi4Te7
• Anomalous Second Harmonic Generation from Atomically Thin MnBi2Te4
• Even-Odd Layer-Dependent Exchange Bias Effect in MnBi2Te4 Chern Insulator Devices
• Coexistence of Superconductivity and Antiferromagnetism in Topological Magnet MnBi2Te4 Films
• Ferroelectrically switchable magnetic multistates in MnBi${}_2$Te${}_4$(Bi${}_2$Te${}_3$)${}_n$ and MnSb${}_2$Te${}_4$(Sb${}_2$Te${}_3$)${}_n$ (n = 0, 1) thin films
• Identifying Axion Insulator by Quantized Magnetoelectric Effect in Antiferromagnetic ${\mathrm{MnBi}}_2{\mathrm{Te}}_4$ Tunnel Junction
• Direct visualization of surface spin-flip transition in MnBi4Te7
• Magnetic kagome materials RETi3Bi4 family with weak interlayer interactions
• Two-dimensional ferromagnetic extension of a topological insulator
• Magnon-magnon interaction in monolayer MnBi${}_2$Te${}_4$
• Lossless Spin-Orbit Torque in Antiferromagnetic Topological Insulator MnBi${}_2$Te${}_4$
• Correlation between magnetic domain structures and quantum anomalous Hall effect in epitaxial MnBi2Te4 thin films
• Magnetoresistance oscillations in vertical junctions of 2D antiferromagnetic semiconductor CrPS${}_4$
• Intermediate anomalous Hall states induced by noncollinear spin structure in magnetic topological insulator MnBi2Te4
• Quantum interference in a superconductor-${\mathrm{MnBi}}_2{\mathrm{Te}}_4$-superconductor Josephson junction
• Distinguishing Surface and Bulk Electromagnetism via Their Dynamics in an Intrinsic Magnetic Topological Insulator
• Tailoring Neel orders in Layered Topological Antiferromagnets
• Topological magnon-polaron transport in a bilayer van der Waals magnet
• An ab-initio study on engineering quantum anomalous Hall effect in compensated antiferromagnet MnBi${}_2$Te${}_4$
• Role of non-magnetic spacers in the magnetic interactions of antiferromagnetic topological insulators MnBi${}_4$Te${}_7$ and MnBi${}_2$Te${}_4$
• Efficient Quantum Transduction Using Anti-Ferromagnetic Topological Insulators
• Single-layer magnet phase in intrinsic magnetic topological insulators, $[\mathrm{MnTe}][{\mathrm{Bi}}_2{\mathrm{Te}}_3{]}_{\mathrm{n}}$, far beyond the thermodynamic limit
• Strongly enhanced topological quantum phases in dual-surface AlO${}_x$-encapsulated MnBi${}_2$Te${}_4$
• Quantum-Confined Tunable Ferromagnetism on the Surface of a van der Waals Antiferromagnet NaCrTe2
• Interacting Dirac magnons in the van der Waals ferromagnet CrBr${}_3$
• Universal Role of Combined Symmetry for the Protection of the Dirac Cone in Antiferromagnetic Topological Insulators
• Chromium chalcohalide Janus monolayer ferromagnets with perpendicular magnetic anisotropy and high Curie temperature
• Conductance oscillations of antiferromagnetic layer tunnel junctions
• Tunable linear and nonlinear anomalous Hall transport in two-dimensional CrPS${}_4$
• Light-driven topological and magnetic phase transitions in thin-layer antiferromagnets