Electric field induced topological phase transition and large enhancements of spin-orbit coupling and Curie temperature in two-dimensional ferromagnetic semiconductors

Abstract

Tuning topological and magnetic properties of materials by applying an electric field is widely used in spintronics. In this work, we find a topological phase transition from topologically trivial to nontrivial states at an external electric field of about 0.1 V/A in MnBi${}_2$Te${}_4$ monolayer that is a topologically trivial ferromagnetic semiconductor. It is shown that when electric field increases from 0 to 0.15 V/A, the magnetic anisotropy energy (MAE) increases from about 0.1 to 6.3 meV, and the Curie temperature Tc increases from 13 to about 61 K. The increased MAE mainly comes from the enhanced spin-orbit coupling due to the applied electric field. The enhanced Tc can be understood from the enhanced $p$-$d$ hybridization and decreased energy difference between $p$ orbitals of Te atoms and $d$ orbitals of Mn atoms. Moreover, we propose two novel Janus materials MnBi${}_2$Se${}_2$Te${}_2$ and MnBi${}_2$S${}_2$Te${}_2$ monolayers with different internal electric polarizations, which can realize quantum anomalous Hall effect (QAHE) with Chern numbers $C$=1 and $C$=2, respectively. Our study not only exposes the electric field induced exotic properties of MnBi2Te4 monolayer, but also proposes novel materials to realize QAHE in ferromagnetic Janus semiconductors with electric polarization.

arXiv comment7 pages, 5 figures

References in corpus (42)

• Maximally-localized generalized Wannier functions for composite energy bands
• Experimental Observation of the Quantum Anomalous Hall Effect in a Magnetic Topological Insulator
• WannierTools: An open-source software package for novel topological materials
• Gate-tunable Room-temperature Ferromagnetism in Two-dimensional Fe${}_3$GeTe${}_2$
• Quantized Anomalous Hall Effect in Magnetic Topological Insulators
• Maximally-localized Wannier functions for entangled 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
• Controlling magnetism in 2D CrI3 by electrostatic doping
• 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
• Quantum Anomalous Hall Effect in Hg${}_{1-y}$Mn${}_y$Te Quantum Wells
• Experimental realization of an intrinsic magnetic topological insulator
• Unique thickness-dependent properties of the van der Waals interlayer antiferromagnet $\mathrm{MnB}{\mathrm{i}}_2\mathrm{T}{\mathrm{e}}_4$ films
• Observation of an Electric-Field Induced Band Gap in Bilayer Graphene by Infrared Spectroscopy
• Observation of an electrically tunable band gap in trilayer graphene
• Ab Initio Theory of Gate Induced Gaps in Graphene Bilayers
• High-Chern-Number and High-Temperature Quantum Hall Effect without Landau Levels
• Magnetic modulation doping in topological insulators toward higher-temperature quantum anomalous Hall effect
• Bandgap and doping effects in MoS2 measured by Scanning Tunneling Microscopy and Spectroscopy
• Topological Electronic Structure and Its Temperature Evolution in Antiferromagnetic Topological Insulator MnBi2Te4
• Large magnetic gap at the Dirac point in a Mn-induced Bi${}_2$Te${}_3$ heterostructure
• Quantized Anomalous Hall Effect in Two-Dimensional Ferromagnets - Quantum Hall Effect from Metal -
• Highly-ordered wide bandgap materials for quantized anomalous Hall and magnetoelectric effects
• Variety of magnetic topological phases in the (MnBi${}_2$Te${}_4$)(Bi${}_2$Te${}_3$)${}_m$ family
• Realization of an intrinsic, ferromagnetic topological state in MnBi8Te13
• Orbital analogue of quantum anomalous Hall effect in $p$-band systems
• Two-dimensional Weyl Half Semimetal and Tunable Quantum Anomalous Hall Effect in Monolayer PtCl${}_3$
• Observation of high-temperature quantum anomalous Hall regime in intrinsic MnBi${}_2$Te${}_4$/Bi${}_2$Te${}_3$ superlattice
• Antiferromagnetic Topological Insulator MnBi2Te4: Synthesis and Magnetic properties
• Topological electronic structure and intrinsic magnetization in MnBi${}_4$Te${}_7$: a Bi${}_2$Te${}_3$-derivative with a periodic Mn sublattice
• Strain-Induced Room-Temperature Ferromagnetic Semiconductors with Large Anomalous Hall Conductivity in Two-Dimensional Cr2Ge2Se6
• High-Temperature Quantum Anomalous Hall Insulators in Lithium-Decorated Iron-Based Superconductor Materials
• Two-Dimensional Room Temperature Ferromagnetic Semiconductors with Quantum Anomalous Hall Effect
• Topological Spin Texture in a Quantum Anomalous Hall Insulator
• Magnetized Topological Insulator Multilayers
• Quantum Anomalous Hall State in Ferromagnetic SrRuO${}_3$ (111) Bilayers
• Berry Curvature Engineering by Gating Two-Dimensional Antiferromagnets
• Flat Band and Hole-induced Ferromagnetism in a Novel Carbon Monolayer
• Superconductivity in sodium-doped T-carbon

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• Enhancement of temperature of quantum anomalous Hall effect in two-dimensional germanene/magnetic semiconductor heterostructures
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