Spontaneous decays of magneto-elastic excitations in noncollinear antiferromagnet (Y,Lu)MnO3

Abstract

When magnons and phonons, the fundamental quasiparticles of the solid, are coupled to one another, they form a new hybrid quasi-particle, leading to novel phenomena and interesting applications. Despite its wide-ranging importance, however, detailed experimental studies on the underlying Hamiltonian is rare for actual materials. Moreover, the anharmonicity of such magnetoelastic excitations remains largely unexplored although it is essential for a proper understanding of their diverse thermodynamic behaviour as well as intrinsic zero-temperature decay. Here we show that in noncollinear antiferromagnets, a strong magnon-phonon coupling can significantly enhance the anharmonicity, resulting in the creation of magnetoelastic excitations and their spontaneous decay. By measuring the spin waves over the full Brillouin zone and carrying out anharmonic spin wave calculations using a Hamiltonian with an explicit magnon-phonon coupling, we have identified a hybrid magnetoelastic mode in (Y,Lu)MnO3 and quantified its decay rate and the exchange-striction coupling term required to produce it. Our work has wide implications for understanding of the spin-phonon coupling and the resulting excitations of the broad classes of noncollinear magnets.

References in corpus (23)

• Phonons and related properties of extended systems from density-functional perturbation theory
• Possible evidence for electromagnons in multiferroic manganites
• Spontaneous Magnon Decays
• Order by distortion and string modes in pyrochlore antiferromagnet
• HORACE: software for the analysis of data from single crystal spectroscopy experiments at time-of-flight neutron instruments
• Spin-waves in triangular lattice antiferromagnet: decays, spectrum renormalization, and singularities
• Exchange interaction effects on the optical properties of LuMnO3
• Strong spin-lattice coupling in multiferroic HoMnO${}_3$: Thermal expansion anomalies and pressure effect
• Unconventional spin fluctuations in the hexagonal antiferromagnet YMnO${}_3$
• Raman and Infrared-Active Phonons in Hexagonal HoMnO${}_3$ Single Crystals: Magnetic Ordering Effects
• Magnetic structure of hexagonal YMnO3 and LuMnO3 from a microscopic point of view
• Magnon breakdown in a two dimensional triangular lattice Heisenberg antiferromagnet of multiferroic LuMnO${}_3$
• Hexagonal RMnO${}_3$: a model system for 2D triangular lattice antiferromagnets
• Magnetic excitations in multiferroic LuMnO3 studied by inelastic neutron scattering
• Magnetic soft modes in the locally distorted triangular antiferromagnet alpha-CaCr2O4
• Magnetism in Geometrically Frustrated YMnO3 Under Hydrostatic Pressure Studied with Implanted Muons
• Thermal conductivity in large-$J$ two-dimensional antiferromagnets: Role of phonon scattering
• An ab initio study of magneto-electric coupling of $\mathrm{YMn}{\mathrm{O}}_3$
• Magnetoelastic effects in multiferroic YMnO${}_3$
• Coupling of phonons and spin waves in triangular antiferromagnet
• Quantum and thermal ionic motion, oxygen isotope effect, and superexchange distribution in La${}_2$CuO${}_4$
• Spin-lattice order in frustrated ZnCr2O4
• Spin-lattice coupling, frustration and magnetic order in multiferroic RMnO3

Cited by in corpus (42)

• Suppression of magnetic ordering in XXZ-type antiferromagnetic monolayer NiPS3
• Topological spin excitations in honeycomb ferromagnet CrI${}_3$
• Direct observation of magnon-phonon coupling in yttrium iron garnet
• Topological Magnetoelastic Excitations in Non-Collinear Antiferromagnets
• Observation of magnon-polarons in a uniaxial antiferromagnetic insulator
• Magnon topology and thermal Hall effect in trimerized triangular lattice antiferromagnet
• Magnon damping in the zigzag phase of the Kitaev-Heisenberg-$\Gamma$ model on a honeycomb lattice
• Antichiral spin order its Goldstone modes and their hybridization with phonons in the topological semimetal Mn3Ge
• Damped Dirac magnon in a metallic kagome antiferromagnet FeSn
• Direct observation of topological magnon polarons in a multiferroic material
• Field induced spontaneous quasiparticle decay and renormalization of quasiparticle dispersion in a quantum antiferromagnet
• Magnetic ground state and magnon-phonon interaction in multiferroic h-YMnO${}_3$
• Anisotropic magnon damping by zero-temperature quantum fluctuations in ferromagnetic CrGeTe${}_3$
• Sign reversal of anomalous Hall conductivity and magnetoresistance in cubic non-collinear antiferromagnet Mn${}_3$Pt thin films
• Evidence for magnon-phonon coupling in the topological magnet Cu${}_3$TeO${}_6$
• Quantum Damping of Skyrmion Crystal Eigenmodes due to Spontaneous Quasiparticle Decay
• Magnon-polaron excitations in the noncollinear antiferromagnet Mn${}_3$Ge
• Magnetic interactions in PdCrO${}_2$ and their effects on its magnetic structure
• Magnetic excitations in bulk multiferroic two-dimensional triangular lattice antiferromagnet (Lu,Sc)FeO${}_3$
• Instabilities of heavy magnons in an anisotropic magnet
• Thermal Hall effects due to topological spin fluctuations in YMnO${}_3$
• Hybridization and Decay of Magnetic Excitations in two-dimensional Triangular Lattice Antiferromagnets
• Classical spin liquid or extended critical range in h-YMnO${}_3$?
• Renormalization of spin excitations in hexagonal HoMnO3 by magnon-phonon coupling
• Spin texture induced by non-magnetic doping and spin dynamics in 2D triangular lattice antiferromagnet h-Y(Mn,Al)O3
• Studies on the high-temperature ferroelectric transition of multiferroic hexagonal manganite RMnO3
• Dynamic spin-lattice coupling and nematic fluctuations in NaFeAs
• Diagonal and off-diagonal thermal conduction with resonant phonon scattering in $N{i}_{3}Te{O}_6$
• Spin-orbit coupling effects on spin-phonon coupling in Cd2Os2O7
• Sizable suppression of magnon Hall effect by magnon damping in Cr${}_2$Ge${}_2$Te${}_6$
• Hierarchical excitations from correlated spin tetrahedra on the breathing pyrochlore lattice
• Neutron Scattering Signature of Phonon Renormalization in Nickel (II) Oxide
• Spin-lattice interaction parameters from first principles: theory and implementation
• Exchange striction induced thermal Hall effect in van der Waals antiferromagnet MnPS${}_3$
• Momentum-dependent magnon lifetime in the metallic non-collinear triangular antiferromagnet CrB2
• Lattice dynamics in the double-helix antiferromagnet FeP
• Calculating spin-lattice interactions in ferro- and antiferromagnets: the role of symmetry, dimension and frustration
• Doping effects on trimerization and magnetoelectric coupling of single crystal multiferroic (Y,Lu)MnO3
• Experimental determination of the magnetic interactions of frustrated Cairo pentagon lattice materials
• Characterizing the diffuse continuum excitations in the classical spin liquid $h$-YMnO${}_3$
• Spin dynamics in linear magnetoelectric material Mn${}_3$Ta${}_2$O${}_8$
• An Effective Field Theory of Magneto-Elasticity