Magnon Broadening Effect by Magnon-Phonon Interaction in Colossal Magnetoresistance Manganites

Abstract

In order to study the magnetic excitation behaviors in colossal magnetoresistance manganites, a magnon-phonon interacting system is investigated. Sudden broadening of magnon linewidth is obtained when a magnon branch crosses over an optical phonon branch. Onset of the broadening is approximately determined by the magnon density of states. Anomalous magnon damping at the brillouine zone boundary observed in low Curie temperature manganites is explained.

4 pages incl. 4 figs. New e-mail: [email protected]

References in corpus (3)

• Phase Separation in Electronic Models for Manganites
• Softening and Broadening of the Zone Boundary Magnons in Pr0.63Sr0.37MnO3
• Structure and Spin Dynamics of La${}_{0.85}$Sr${}_{0.15}$MnO${}_3$

Cited by in corpus (16)

• Approach to the metal-insulator transition in La(1-x)CaxMnO3 (0<x<.2): magnetic inhomogeneity and spin wave anomaly
• Spectacular doping dependence of interlayer exchange and other results on spin waves in bilayer manganites
• Evolution of spin-wave excitations in ferromagnetic metallic manganites
• A novel spin wave expansion, finite temperature corrections and order from disorder effects in the double exchange model
• Magnons in Ferromagnetic Metallic Manganites
• Magnetic field control of topological magnon-polaron bands in two-dimensional ferromagnets
• Non--Heisenberg Spin Dynamics of Double-Exchange Ferromagnets with Coulomb Repulsion
• Anomaly in Spin Excitation Spectrum of Double-Exchange Systems with Randomness
• Spectral Function Analysis on Spin Dynamics in Double-Exchange Systems with Randomness
• Magnetic excitations and anomalous spin wave broadening in multiferroic FeV2O4
• Colossal magnetoresistance and quenched disorder in manganese oxides
• Dynamics of Phase Separated States in the Double Exchange Model
• Magnon softening and damping in the ferromagnetic manganites due to orbital correlations
• Phenomenological model of anomalous magnon softening and damping in half-metallic manganites
• Magnon damping and mode softening in quantum double-exchange ferromagnets
• Perturbative calculation of the spin-wave dispersion in a disordered double-exchange model