Universal spin wave damping in magnetic Weyl semimetals

Abstract

We analyze the decay of spin waves into Stoner excitations in magnetic Weyl semimetals. The lifetime of a mode is found to have a universal dependence on its frequency and momentum, and on a few parameters that characterize the relativistic Weyl spectrum. At the same time, Gilbert damping by Weyl electrons is absent. The decay rate of spin waves is calculated perturbatively using the s-d model of itinerant Weyl or Dirac electrons coupled to local moments. We show that many details of the Weyl spectrum, such as the momentum-space locations, dispersions and sizes of the Weyl Fermi pockets, can be deduced indirectly by probing the spin waves of local moments using inelastic neutron scattering.

arXiv comment11 pages, 5 figures

References in corpus (42)

• Electronic Structure of Pyrochlore Iridates: From Topological Dirac Metal to Mott Insulator
• Weyl Semimetal in a Topological Insulator Multilayer
• Roles of non-equilibrium conduction electrons on magnetization dynamics of ferromagnets
• Nonlocal magnetization dynamics in ferromagnetic heterostructures
• Quantum Hall effects in a Weyl Semi-Metal: possible application in pyrochlore Iridates
• Evidence for Magnetic Weyl Fermions in a Correlated Metal
• Giant anomalous Nernst effect and quantum-critical scaling in a ferromagnetic semimetal
• Topological Weyl semimetals in the chiral antiferromagnetic materials Mn3Ge and Mn3Sn
• Direct observation of the Dzyaloshinskii-Moriya interaction in a Pt/Co/Ni film
• Chirality from interfacial spin-orbit coupling effects in magnetic bilayers
• Damping by slow relaxing rare earth impurities in Ni80Fe20
• Nonreciprocal spin wave propagation in chiral-lattice ferromagnets
• Gilbert Damping in Magnetic Multilayers
• Low relaxation rate in a low-Z alloy of iron
• Prediction of Giant Spin Motive Force due to Rashba Spin-Orbit Coupling
• Interaction Driven Subgap Spin Exciton in the Kondo Insulator SmB6
• Spin Orbit Coupling and Spin Waves in Ultrathin Ferromagnets: The Spin Wave Rashba Effect
• Nonreciprocal magnons and symmetry-breaking in the noncentrosymmetric antiferromagnet
• Magnetic textures and dynamics in magnetic Weyl semimetals
• Determination of intrinsic damping of perpendicularly magnetized ultrathin films from time resolved precessional magnetization measurements
• Inhomogeneous Gilbert damping from impurities and electron-electron interactions
• Magnetization Dissipation in Ferromagnets from Scattering Theory
• Magnon dispersion shift in the induced-ferromagnetic phase of the noncentrosymmetric MnSi
• Spin Excitations and Spin Wave Gap in the Ferromagnetic Weyl Semimetal Co${}_3$Sn${}_2$S${}_2$
• Spin-orbit coupled transport and spin torque in a ferromagnetic heterostructure
• Theory for spin torque in Weyl semimetal with magnetic texture
• Phenomenology of chiral damping in noncentrosymmetric magnets
• Antichiral spin order its Goldstone modes and their hybridization with phonons in the topological semimetal Mn3Ge
• Field dependence of non-reciprocal magnons in chiral MnSi
• Semiclassical dynamics of spin density waves
• The dynamics of local magnetic moments induced by itinerant Weyl electrons
• In-gap collective mode spectrum of the Topological Kondo Insulator SmB6
• Quantum field theory of topological spin dynamics
• Signatures of coupling between spin waves and Dirac fermions in YbMnBi${}_2$
• Non-reciprocal magnons in non-centrosymmetric MnSi
• Another view on Gilbert damping in two-dimensional ferromagnets
• Topological orders of monopoles and hedgehogs: From electronic and magnetic spin-orbit coupling to quarks
• Spin relaxation torque in metallic ferromagnets
• Spin-Waves in itinerant ferromagnets
• Incommensurate magnetism mediated by Weyl fermions in NdAlSi
• Neutron scattering off Weyl semimetals
• Origin of intrinsic Gilbert damping

Cited by in corpus (5)

• Topological spiral magnetism in the Weyl semimetal SmAlSi
• Quantum-classical approach to spin and charge pumping and the ensuing radiation in THz spintronics: Example of ultrafast-light-driven Weyl antiferromagnet Mn${}_3$Sn
• Nonlocal damping of spin waves in a magnetic insulator induced by normal, heavy, or altermagnetic metallic overlayer: A Schwinger-Keldysh field theory approach
• Single crystalline orthorhombic GdAlGe as a rare earth magnetic Dirac nodal-line metal
• Axionic Instability of Periodic Weyl-Semimetal Superstructures