Dynamical properties of magnetic topological insulator $T$Bi${}_2$Te${}_4$ ($T=$Mn, Fe): phonons dispersion, Raman active modes, and chiral phonons study

Abstract

Recently discovered magnetic topological insulators $T$Bi${}_2$Te${}_4$ ($T=$Mn, Fe) crystallize into the $R\bar{3}m$ rhombohedral structure and exhibit the antiferromagnetic order. Here, we discuss the lattice dynamics of these compounds to confirm the stability of these systems. We show that the phonon dispersion does not contain soft modes, so both compounds are dynamically stable in the $R\bar{3}m$ phase. We perform theoretical analyses of the mode activity at $\Gamma$ point for the discussed compounds. In the case of the Raman active modes, our results are in agreement with the experimentally observed frequencies. Finally, we also discuss the possibility of realization of chiral phonons.

arXiv comment8 pages, 4 figures

References in corpus (32)

• 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
• Band structure diagram paths based on crystallography
• Robust axion insulator and Chern insulator phases in a two-dimensional antiferromagnetic topological insulator
• Experimental realization of an intrinsic magnetic topological insulator
• Valley contrasting chiral phonons in monolayer hexagonal lattices
• 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
• Angular Momentum of Phonons and Einstein-de Haas Effect
• Intrinsic magnetic topological insulator phases in the Sb doped MnBi2Te4 bulks and thin flakes
• A van der Waals antiferromagnetic topological insulator with weak interlayer magnetic coupling
• Crystal Symmetry Breaking in Few-Quintuple Bismuth Telluride Films: Applications in Nanometrology of Topological Insulators
• Spin - Phonon Coupling in Nickel Oxide Determined from Ultraviolet Raman Spectroscopy
• Intertwined Topological and Magnetic Orders in Atomically Thin Chern Insulator MnBi2Te4
• Pseudospins and topological effects of phonons in a Kekule lattice
• Antiferromagnetic Topological Insulator MnBi2Te4: Synthesis and Magnetic properties
• Distinguishing bulk and surface electron-phonon coupling in the topological insulator Bi2Se3 using time-resolved photoemission spectroscopy
• Crystal and magnetic structures of magnetic topological insulators MnBi${}_2$Te${}_4$ and MnBi${}_4$Te${}_7$
• Coexistence of Surface Ferromagnetism and Gapless Topological State in MnBi${}_2$Te${}_4$
• 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
• Pressure-induced Topological and Structural Phase Transitions in an Antiferromagnetic Topological Insulator
• Phonon spectrum and bonding properties of Bi${}_2$Se${}_3$: Role of strong spin-orbit interaction
• Spectroscopic realization of large surface gap in a doped magnetic topological insulator
• Origin of the Electron-Phonon Interaction of Topological Semimetal Surfaces Measured with Helium Atom Scattering
• Realizing gapped surface states in magnetic topological insulator MnBi${}_{2-x}$Sb${}_x$Te${}_4$
• Chiral phonons in honeycomb sublattice of layered CoSn-like compounds
• Vibrational Spectra of Pb2Bi2Te3, PbBi2Te4 and PbBi4Te7 Topological Insulators: Temperature Dependent Raman and Theoretical Insight from DFT Simulations
• Electron-Phonon Coupling and Quantum Correction to Topological Magnetoconductivity in Bi2GeTe4
• Interlayer Ferromagnetism and High-Temperature Quantum Anomalous Hall Effect in \textit{p}-Doped MnBi${}_2$Te${}_4$ Multilayers
• Strain-driven chiral phonons in two-dimensional hexagonal materials
• Group theory study of the vibrational modes and magnetic order in the topological antiferromagnet MnBi${}_2$Te${}_4$

Cited by in corpus (11)

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• Crystal structure and Raman active lattice vibrations of magnetic topological insulators MnBi2Te4 n(Bi2Te3) (n = 0, 1, . . . , 6)
• Multimechanism quantum anomalous Hall and Chern number tunable states in germanene (silicene, stanene)/$M$Bi${}_2$Te${}_4$ heterostructures
• Novel magnetic topological insulator FeBi${}_2$Te${}_4$ with controllable topological quantum phase
• Universally optimizable strategy for magnetic gaps towards high-temperature quantum anomalous Hall states via magnetic-insulator/topological-insulator building-blocks
• Chiral phonons in binary compounds $A$Bi ($A$ = K, Rb, Cs) with P2${}_1$/c structure
• $T_3$Pb${}_{2}C{h}_2$ ($T$=Pd,Pt and $Ch$=S,Se) with transition metal kagome net: Dynamical properties, phonon nodal line, phonon surface states, and chiral phonons
• Coexistent topological and chiral phonons in chiral RhGe: An ab initio study
• Correlation stabilized ferromagnetic MnRuAs with distorted kagome lattice
• Chiral phonon in the cubic system based on the Laves phase of $A$Bi${}_2$ ($A=$K, Rb, Cs)
• Anisotropic electron-phonon coupling and chiral phonons in van der Waals room temperature ferromagnet Fe${}_5$GeTe${}_2$