Antichiral spin order its Goldstone modes and their hybridization with phonons in the topological semimetal Mn3Ge

Abstract

Quantum materials with strong transport responses to disparate physical quantities are of great fundamental significance and may hold technological potentials. The interplay between interactions and topology drive such responses through the effects of spontaneous symmetry breaking and the associated domain configurations on quantum transport. Here we provide a comprehensive description of the magnetism of Mn3Ge, an antiferromagnetic kagomebased semimetal with room temperature transport anomalies associated with topologically protected Weyl nodes. Using polarized neutron diffraction, we show the all-important magnetic structure is anti-chiral and coplanar carrying the symmetry of a ferromagnet without appreciable magnetization. We probe and classify the long wavelength excitations that determine its macroscopic responses including a set of collective magneto-elastic modes. We develop a phenomenological spin Hamiltonian with exchange, Dzyaloshinskii-Moriya, and crystal field interactions to describe its collective magnetism. The itinerant character of the magnetism that drives quantum transport is apparent in spin wave damping and extended magnetic interactions. Our work provides the scientific basis for manipulation of the chiral antiferromagnetic texture of Mn3Ge to control its topological quantum transport.

arXiv commentMain text has 40 pages, 6 figures. Supplemental Information has 14 pages, 2 figures

References in corpus (35)

• Berry Phase Effects on Electronic Properties
• Antiferromagnetic spintronics
• Mantid - Data Analysis and Visualization Package for Neutron Scattering and $\mu SR$ Experiments
• Quantum Spin Liquid States
• Giant anomalous Hall effect in a ferromagnetic Kagome-lattice semimetal
• Massive Dirac fermions in a ferromagnetic kagome metal
• Large anomalous Hall effect driven by non-vanishing Berry curvature in non-collinear antiferromagnetic Mn3Ge
• Magnetic inversion symmetry breaking and ferroelectricity in TbMnO3
• Large anomalous Nernst effect at room temperature in a chiral antiferromagnet
• Magnetically driven ferroelectric order in Ni${}_3$V${}_2$O${}_8$
• Evidence for Magnetic Weyl Fermions in a Correlated Metal
• Linear spin wave theory for single-Q incommensurate magnetic structures
• Topological Weyl semimetals in the chiral antiferromagnetic materials Mn3Ge and Mn3Sn
• Non-collinear Antiferromagnets and the Anomalous Hall Effect
• Giant Anomalous Hall Effect in the Chiral Antiferromagnet Mn3Ge
• Strong, anisotropic anomalous Hall effect and spin Hall effect in chiral antiferromagnetic compounds Mn${}_{3}X$ ($X$ = Ge, Sn, Ga, Ir, Rh and Pt)
• Spin-orbit coupling induced anisotropy effects in bimetallic antiferromagnets: A route towards antiferromagnetic spintronics
• HORACE: software for the analysis of data from single crystal spectroscopy experiments at time-of-flight neutron instruments
• Symmetry breaking due to Dzyaloshinsky-Moriya interactions in the kagome lattice
• Anomalous Hall effect and topological defects in antiferromagnetic Weyl semimetals: Mn${}_3$Sn/Ge
• Spin waves in the Frustrated Kagome Lattice Antiferromagnet KFe3(OH)6(SO4)2
• Anomalous Hall Effect in Thin Film of the Weyl Antiferromagnet Mn${}_3$Sn
• Spinons in the strongly correlated copper oxide chains in SrCuO2
• MCViNE -- An object oriented Monte Carlo neutron ray tracing simulation package
• Spontaneous decays of magneto-elastic excitations in noncollinear antiferromagnet (Y,Lu)MnO3
• Magnetic Excitations in Non-Collinear Antiferromagnetic Weyl Semimetal $\mathsf{M}{\mathsf{n}}_3\mathsf{Sn}$
• Dynamical structure factor of the triangular antiferromagnet: the Schwinger boson theory beyond the mean field approach
• Evaluation of spin diffusion length and spin Hall angle of antiferromagnetic Weyl semimetal Mn${}_3$Sn
• Weyl Fermions in antiferromagnetic Mn(3)Sn and Mn(3)Ge
• Exchange bias up to room temperature in the antiferromagnetic bulk hexagonal Mn3Ge
• Order and excitations in large-$S$ kagomé-lattice antiferromagnets
• Ground state magnetic structure of Mn${}_3$Ge
• Magnetic ground state and magnon-phonon interaction in multiferroic h-YMnO${}_3$
• First and second order transition of frustrated Heisenberg spin systems
• Magnon-polaron excitations in the noncollinear antiferromagnet Mn${}_3$Ge

Cited by in corpus (23)

• Anomalous transport due to Weyl fermions in the chiral antiferromagnets Mn${}_3$$X$, $X$ = Sn, Ge
• Piezomagnetic switching of anomalous Hall effect in an antiferromagnet at room temperature
• High-throughput search for magnetic topological materials using spin-orbit spillage, machine-learning and experiments
• Theory of spin waves in a hexagonal antiferromagnet
• Non-Collinear Spin Current for Switching of Chiral Magnetic Textures
• Complex magnetic structure and spin waves of the noncollinear antiferromagnet Mn5Si3
• Hybrid topological magnon-phonon modes in honeycomb and kagome lattices
• Anisotropic magnetic interactions in hexagonal AB-stacked kagome lattice structures: Applications to ${\mathrm{Mn}}_3\mathrm{X}$ ($\mathrm{X}$ = $\mathrm{Ge}$, $\mathrm{Sn}$, $\mathrm{Ga}$) compounds
• Strong Magneto-Elastic Coupling in Mn${}_3$X (X = Ge, Sn)
• Unconventional magneto-resistance, and electronic transition in Mn${}_3$Ge Weyl semimetal
• Zeeman term for the Néel vector in a two sublattice antiferromagnet using Dzyaloshinsky-Moriya interaction and magnetic field
• Magnetism and Magnetotransport in the Kagome Antiferromagnet ${\text{Mn}}_3\text{Ge}$
• Magnetic States and Electronic Properties of Manganese-Based Intermetallic Compounds Mn${}_2$YAl and Mn${}_3$Z (Y = V, Cr, Fe, Co, Ni; Z = Al, Ge, Sn, Si, Pt)
• Spin-frame field theory of a three-sublattice antiferromagnet
• FeGe1-xSbx:a series of novel kagome metals with noncollinear antiferromagnetism
• Intertwined Charge and Spin Density Waves in a Topological Kagome Material
• Strain tuning the magnetic and transport properties of Mn${}_3$Ge
• Universal spin wave damping in magnetic Weyl semimetals
• Magnetic interactions in AB-stacked kagome lattices: magnetic structure, symmetry, and duality
• The free energy of twisting spins in Mn${}_3$Sn
• Anomalous Hall effect and magnetic structure of the topological semimetal (Mn${}_{0.78}$Fe${}_{0.22}$)${}_3$Ge
• Tuning the Hall response of a noncollinear antiferromagnet via spin-transfer torques and oscillating magnetic fields
• Weyl points and anomalous transport effects tuned by the Fe doping in Mn${}_3$Ge Weyl semimetal