Multiple magnetic topological phases in bulk van der Waals crystal MnSb4Te7

Abstract

The magnetic van der Waals crystals MnBi2Te4/(Bi2Te3)n have drawn significant attention due to their rich topological properties and the tunability by external magnetic field. Although the MnBi2Te4/(Bi2Te3)n family have been intensively studied in the past few years, their close relatives, the MnSb2Te4/(Sb2Te3)n family, remain much less explored. In this work, combining magnetotransport measurements, angle-resolved photoemission spectroscopy, and first principles calculations, we find that MnSb4Te7, the n = 1 member of the MnSb2Te4/(Sb2Te3)n family, is a magnetic topological system with versatile topological phases which can be manipulated by both carrier doping and magnetic field. Our calculations unveil that its A-type antiferromagnetic (AFM) ground state stays in a Z_2 AFM topological insulator phase, which can be converted to an inversion-symmetry-protected axion insulator phase when in the ferromagnetic (FM) state. Moreover, when this system in the FM phase is slightly carrier doped on either the electron or hole side, it becomes a Weyl semimetal with multiple Weyl nodes in the highest valence bands and lowest conduction bands, which are manifested by the measured notable anomalous Hall effect. Our work thus introduces a new magnetic topological material with different topological phases which are highly tunable by carrier doping or magnetic field.

arXiv comment28 pages including Supplementary Information,14 figures, 3 tables

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Cited by in corpus (16)

• Colloquium: Quantum anomalous Hall effect
• Mn-rich MnSb2Te4: A topological insulator with magnetic gap closing at high Curie temperatures of 45-50 K
• Sample-dependent Dirac point gap in MnBi${}_2$Te${}_4$ and its response to the applied surface charge: a combined photoemission and ab initio study
• Topological magnetic materials of the (MnSb${}_2$Te${}_4$)$\cdot$(Sb${}_2$Te${}_3$)${}_n$ van der Waals compounds family
• Intrinsic Magnetic Topological Materials
• Origin of the exotic electronic states in antiferromagnetic NdSb
• Intrinsic ferromagnetic axion states and a single pair of Weyl fermions in the stable-state Mn\emph{X}${}_2$\emph{B}${}_2$\emph{T}${}_6$-family materials
• Pressure-induced ideal Weyl semimetal state in the layered antiferromagnet EuCd2As2
• Pressure-tunable magnetic topological phases in magnetic topological insulator MnSb4Te7
• Intrinsic ferromagnetic and antiferromagnetic axion insulators in van der Waals materials Mn\emph{X}${}_2$\emph{B}${}_2$\emph{T}${}_6$ family
• Multiple superconducting phases driven by pressure in the topological insulator GeSb4Te7
• Tailoring Neel orders in Layered Topological Antiferromagnets
• Pressure-driven superconductivity in the topological insulator GeBi4Te7
• Vapor transport growth of MnBi2Te4 and related compounds
• Relationship among Structural, Disordered, Magnetism and Band Topology in MnSb2Te4(Sb2Te3)n Family
• Interplay between surface Dirac and Rashba states specific for topologically nontrivial van der Waals superlattices