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

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

1999-05-11

arxiv.org/abs/cond-mat/9905133v2

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages incl. 4 figs. New e-mail: furukawa@phys.aoyama.ac.jp

Scientific paper

10.1143/JPSJ.68.2522

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.

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