Spin-charge and spin-orbital coupling effects on spin dynamics in ferromagnetic manganites

Abstract

Correlation-induced spin-charge and spin-orbital coupling effects on spin dynamics in ferromagnetic manganites are calculated with realistic parameters in order to provide a quantitative comparison with experimental results for spin stiffness, magnon dispersion, magnon damping, anomalous zone-boundary magnon softening, and Curie temperature. The role of orbital degeneracy, orbital ordering, and orbital correlations on spin dynamics in different doping regimes is highlighted.

19 pages, 9 figures

References in corpus (11)

• Evolution of spin-wave excitations in ferromagnetic metallic manganites
• Magnons in Ferromagnetic Metallic Manganites
• Spin waves throughout the Brillouin zone and magnetic exchange coupling in ferromagnetic metallic manganites La${}_{1-x}$Ca${}_x$MnO${}_3$ ($x=0.25,0.30$)
• Ferromagnetism in the t-t' Hubbard model: interplay of lattice, band dispersion, and interaction effects studied within a Goldstone-mode preserving scheme
• Three--body Correlation Effects on the Spin Dynamics of Double--Exchange Ferromagnets
• Non--Heisenberg Spin Dynamics of Double-Exchange Ferromagnets with Coulomb Repulsion
• Spin waves in a band ferromagnet: spin-rotationally symmetric study with self-energy and vertex corrections
• Spin-charge coupling in a band ferromagnet: magnon-energy reduction, anomalous softening, and damping
• Orbital fluctuations, spin-orbital coupling, and anomalous magnon softening in an orbitally degenerate ferromagnet
• Fermionic representation for the ferromagnetic Kondo lattice model -- diagrammatic study of spin-charge coupling effects on magnon excitations
• Quantum and thermal fluctuations in a two-dimensional correlated band ferromagnet -- Goldstone-mode preserving investigation with self-energy and vertex corrections

Cited by in corpus (3)

• Magnon self energy in the correlated ferromagnetic Kondo lattice model: spin-charge coupling effects on magnon excitations in manganites
• On the origin of CE-type orbital fluctuations in the ferromagnetic metallic La${}_{1.2}$Sr${}_{1.8}$Mn${}_2$O${}_7$
• Role of atomic vacancies and second-neighbor antiferromagnetic-exchange coupling in a ferromagnetic nanoparticle