Tuning the magnetism and band topology through antisite defects in Sb doped MnBi4Te7

Abstract

The fine control of magnetism and electronic structure is crucial since the interplay between magnetism and band topology can lead to various novel magnetic topological states including axion insulators, magnetic Weyl semimetals and Chern insulators etc. Through crystal growth, transport, thermodynamic, neutron diffraction measurements, we show that with Sb-doping, the newly-discovered intrinsic antiferromagnetic topological insulator MnBi4Te7 evolves from antiferro-magnetic to ferromagnetic and then ferrimagnetic. We attribute this to the formation of Mn(Bi,Sb) antisites upon doping, which result in additional Mn sublattices that modify the delicate interlayer magnetic interactions and cause the dominant Mn sublattice to go from antiferromagnetic to ferro-magnetic. We further investigate the effect of antisites on the band topology using the first-principles calculations. Without considering antisites, the series evolves from antiferromagnetic topological insulator (x = 0) to ferromagnetic axion insulators. In the exaggerated case of 16.7% of periodic antisites, the band topology is modified and type-I magnetic Weyl semimetal phase can be realized at intermediate dopings. Therefore, this doping series provides a fruitful platform with continuously tunable magnetism and topology for investigating emergent phenomena, including quantum anomalous Hall effect, Fermi arc states, etc.

arXiv commentDefect analysis and magnetotransport data are added. 6 figs and 2 tables in total

References in corpus (42)

• Double-slit photoelectron interference in strong-field ionization of the neon dimer
• Maximally-localized generalized Wannier functions for composite energy bands
• 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
• Intrinsic magnetic topological insulators in van der Waals layered MnBi${}_2$Te${}_4$-family materials
• 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
• 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
• Topological Phase Transition and Texture Inversion in a Tunable Topological Insulator
• Crystal growth and magnetic structure of MnBi2Te4
• Gapless surface Dirac cone in antiferromagnetic topological insulator MnBi${}_2$Te${}_4$
• Topological Electronic Structure and Its Temperature Evolution in Antiferromagnetic Topological Insulator MnBi2Te4
• Dirac surface states in intrinsic magnetic topological insulators EuSn2As2 and MnBi2nTe3n+1
• Chemical Aspects of the Antiferromagnetic Topological Insulator MnBi${}_2$Te${}_4$
• Arc-tunable Weyl Fermion metallic state in Mo${}_x$W${}_{1-x}$Te${}_2$
• Quantized Response and Topology of Insulators with Inversion Symmetry
• Large magnetic gap at the Dirac point in a Mn-induced Bi${}_2$Te${}_3$ heterostructure
• A van der Waals antiferromagnetic topological insulator with weak interlayer magnetic coupling
• Spin scattering and noncollinear spin structure-induced intrinsic anomalous Hall effect in antiferromagnetic topological insulator $\mathrm{MnB}{\mathrm{i}}_2\mathrm{T}{\mathrm{e}}_4$
• Natural van der Waals heterostructural single crystals with both magnetic and topological properties
• Variety of magnetic topological phases in the (MnBi${}_2$Te${}_4$)(Bi${}_2$Te${}_3$)${}_m$ family
• Quantized topological magnetoelectric effect of the zero-plateau quantum anomalous Hall state
• Realization of an intrinsic, ferromagnetic topological state in MnBi8Te13
• Evolution of structural, magnetic and transport properties in MnBi2-xSbxTe4
• Surfaces of Axion Insulators
• Observation of high-temperature quantum anomalous Hall regime in intrinsic MnBi${}_2$Te${}_4$/Bi${}_2$Te${}_3$ superlattice
• Competing magnetic interactions in the antiferromagnetic topological insulator MnBi${}_2$Te${}_4$
• A-type Antiferromagnetic order in MnBi4Te7 and MnBi6Te10 single crystals
• Site Mixing for Engineering Magnetic Topological Insulators
• Crystal and magnetic structures of magnetic topological insulators MnBi${}_2$Te${}_4$ and MnBi${}_4$Te${}_7$
• Topological Insulators with Commensurate Antiferromagnetism
• Magnetic and transport properties in magnetic topological insulators MnBi2Te4(Bi2Te3)n (n=1,2)
• Defect-driven ferrimagnetism and hidden magnetization in MnBi${}_2$Te${}_4$
• Intrinsic axion insulating behavior in antiferromagnetic MnBi${}_6$Te${}_{10}$
• Magnetic topological insulator MnBi6Te10 with zero-field ferromagnetic state and gapped Dirac surface states
• The Axion Insulator as a Pump of Fragile Topology
• Universal gapless Dirac cone and tunable topological states in (MnBi${}_2$Te${}_4$)${}_m$(Bi${}_2$Te${}_3$)${}_n$ heterostructures
• Persistent gapless surface states in MnBi2Te4/Bi2Te3 superlattice antiferromagnetic topological insulator
• Realizing gapped surface states in magnetic topological insulator MnBi${}_{2-x}$Sb${}_x$Te${}_4$
• Strongly Gapped Topological Surface States on Protected Surfaces of Antiferromagnetic MnBi${}_4$Te${}_7$ and MnBi${}_6$Te${}_{10}$

Cited by in corpus (20)

• Ferromagnetic-antiferromagnetic coexisting ground states and exchange bias effects in $\mathbf{MnB}{\mathbf{i}}_4\mathbf{T}{\mathbf{e}}_7$ and $\mathbf{MnB}{\mathbf{i}}_6\mathbf{T}{\mathbf{e}}_{10}$
• Distinct magnetic gaps between antiferromagnetic and ferromagnetic orders driven by surface defects in the topological magnet MnBi2Te4
• Quantum Imaging of Magnetic Phase Transitions and Spin Fluctuations in Intrinsic Magnetic Topological Nanoflakes
• Growth, characterization and Chern insulator state in MnBi${}_2$Te${}_4$ via the chemical vapor transport method
• Magnetic dilution effect and topological phase transitions in (Mn${}_{1-x}$Pb${}_x$)Bi${}_2$Te${}_4$
• Delicate Ferromagnetism in MnBi${}_6$Te${}_{10}$
• Ferromagnetic MnBi4Te7 obtained with low concentration Sb doping: A promising platform for exploring topological quantum states
• On the topological surface states of the intrinsic magnetic topological insulator Mn-Bi-Te family
• Unconventional pressure-driven metamagnetic transitions in topological van der Waals magnets
• Charge Carrier Mediation and Ferromagnetism induced in MnBi6Te10 Magnetic Topological Insulators by antimony doping
• Field-controlled quantum anomalous Hall effect in electron-doped CrSiTe${}_3$ monolayer: a first-principles prediction
• Unusual dynamic susceptibility arising from soft ferromagnetic domains in MnBi8Te13 and Sb-doped MnBi2nTe3n+1 (n=2, 3)
• Non-volatile Electric Control of Magnetic and Topological Properties of MnBi2Te4 Thin Films
• Atomic-Layer-Controlled Magnetic Orders in MnBi2Te4-Bi2Te3 Topological Heterostructures
• Nonlinear Hall effect and scaling law in Sb-doped topological insulator MnBi4Te7
• Pressure-tunable magnetic topological phases in magnetic topological insulator MnSb4Te7
• Single-layer magnet phase in intrinsic magnetic topological insulators, $[\mathrm{MnTe}][{\mathrm{Bi}}_2{\mathrm{Te}}_3{]}_{\mathrm{n}}$, far beyond the thermodynamic limit
• Magneto-optical effects of an artificially-layered ferromagnetic topological insulator with T${}_C$ of 160 K
• Relationship among Structural, Disordered, Magnetism and Band Topology in MnSb2Te4(Sb2Te3)n Family
• Synthesis of intrinsic magnetic topological insulator MnBi2nTe3n+1 family by chemical vapor transport method with feedback regulation