Theory of helimagnons in itinerant quantum systems

Abstract

The nature and effects of the Goldstone mode in the ordered phase of helical or chiral itinerant magnets such as MnSi are investigated theoretically. It is shown that the Goldstone mode, or helimagnon, is a propagating mode with a highly anisotropic dispersion relation, in analogy to the Goldstone mode in chiral liquid crystals. Starting from a microscopic theory, a comprehensive effective theory is developed that allows for an explicit description of the helically ordered phase, including the helimagnons, for both classical and quantum helimagnets. The directly observable dynamical spin susceptibility, which reflects the properties of the helimagnon, is calculated.

arXiv comment20 pp., 1 eps fig; corrects various typos and incorrect prefactors in Phys Rev B version

References in corpus (4)

• Quantum phase transitions of magnetic rotons
• Nonanalytic Magnetization Dependence of the Magnon Effective Mass in Itinerant Quantum Ferromagnets
• Weak spin-orbit interactions induce exponentially flat mini-bands in magnetic metals without inversion symmetry
• Nonanalytic Corrections to Fermi-Liquid Behavior in Helimagnets

Cited by in corpus (62)

• Fermi-liquid instabilities at magnetic quantum phase transitions
• Spin Transfer Torques in MnSi at Ultra-low Current Densities
• Collective spin excitations of helices and magnetic skyrmions: review and perspectives of magnonics in non-centrosymmetric magnets
• Fluctuation-induced first-order phase transition in Dzyaloshinskii-Moriya helimagnets
• Theory of the helical spin crystal: a candidate for the partially ordered state of MnSi
• Quantum critical behavior in itinerant electron systems -- Eliashberg theory and instability of a ferromagnetic quantum-critical point
• Nonreciprocal spin wave propagation in chiral-lattice ferromagnets
• Fluctuations and phase transitions in Larkin-Ovchinnikov liquid crystal states of population-imbalanced resonant Fermi gas
• Spin waves in a skyrmion crystal
• Theory of helical spin crystals: phases, textures and properties
• New magnetic phase of the chiral skyrmion material Cu2OSeO3
• Single magnetic chirality in the magneto-electric NdFe${}_3$(${}^{11}$BO${}_3$)${}_4$
• Helimagnon Bands as Universal Spin Excitations of Chiral Magnets
• Spin resonance in chiral helimagnet
• Magnetic Ordering of Nuclear Spins in an Interacting 2D Electron Gas
• Band structure of helimagnons in MnSi resolved by inelastic neutron scattering
• Crystalline phases in chiral ferromagnets: Destabilization of helical order
• 0-pi Transitions in a Superconductor/Chiral Ferromagnet/Superconductor Junction induced by a Homogeneous Cycloidal Spiral
• Spin-resolved inelastic electron scattering by spin waves in noncollinear magnets
• Nonlinear smectic elasticity of a helical state in cholesterics and helimagnets
• Diversity of critical behavior within a universality class
• Field dependence of non-reciprocal magnons in chiral MnSi
• Quantum order-by-disorder near criticality and the secret of partial order in MnSi
• The multi-purpose three-axis spectrometer (TAS) MIRA at FRM II
• Combing the helical phase of chiral magnets with electric currents
• Theory of helimagnons in itinerant quantum systems II: Nonanalytic corrections to Fermi-liquid behavior
• Quantum liquid-crystal order in resonant atomic gases
• Spin-Transfer Torques in Helimagnets
• Observation of Coherent Helimagnons and Gilbert damping in an Itinerant Magnet
• Light-induced anisotropic skyrmion and stripe phases in a Rashba ferromagnet
• Columnar Fluctuations as a Source of Non-Fermi-Liquid Behavior in Weak Metallic Magnets
• Ordered Phases of Itinerant Dzyaloshinsky-Moriya Magnets and Their Electronic Properties
• Helical glasses near ferromagnetic quantum criticality
• Electromagnon Resonances in the Optical Response of Spiral Magnets
• Dual nature of magnetism in MnSi
• Theory of Helimagnons in Itinerant Quantum Systems III: Quasiparticle Description
• Inelastic Neutron and X-ray Scattering from Incommensurate Magnetic Systems
• Nature of the quantum phase transition to a spin-nematic phase
• Chiral magnetism and helimagnons in a pyrochlore antiferromagnet
• Effective field theory of magnon: Dynamics in chiral magnets and Schwinger mechanism
• Theory of Helimagnons in Itinerant Quantum Systems IV: Transport in the Weak-Disorder Regime
• Infinite critical boson non-Fermi liquid
• Goldstone modes and electromagnon fluctuations in the conical cycloid state of a multiferroic
• Smectons: Soft modes in electronic stripe phases, and their consequences for thermodynamics and transport
• Exact solution of the Boltzmann equation for low-temperature transport coefficients in metals I: Scattering by phonons, antiferromagnons, and helimagnons
• Electronic relaxation rates in metallic ferromagnets
• Generic non-Fermi-liquid behavior of the resistivity in magnets with ferromagnetic, helical, or skyrmionic order
• Effective field theories and spin-wave excitations in helical magnets
• Small-angle interband scattering as the origin of the $T^{3/2}$ resistivity in MnSi
• Magneto-elastic interaction in cubic helimagnets with B20 structure
• Ginzburg-Landau theory for the conical cycloid state in multiferroics: applications to CoCr${}_2$O${}_4$
• Effective field theory of fluctuating wall in open systems: from a kink in Josephson junction to general domain wall
• Helimagnons in a chiral ground state of the pyrochlore antiferromagnets
• Breakdown of Hydrodynamic Transport Theory in the Ordered Phase of Helimagnets
• Magnon-induced long-range correlations and their neutron-scattering signature in quantum magnets
• Experimental determination of the spin Hamiltonian of the cubic chiral magnet MnSi
• Anomalous Transport Behavior in Quantum Magnets
• Zero-field 29Si nuclear magnetic resonance signature of helimagnons in MnSi
• Anomalous Pinning Fields in Helical Magnets: Screening of the Quasiparticle Interaction
• Spin dynamics of antiferromagnets in the presence of a homogeneous magnetization
• Origin of the suppression of magnetic order in MnSi under hydrostatic pressure
• Current response to axial gauge fields in noncentrosymmetric magnetic Weyl semimetals