Spin dynamics in the generalized ferromagnetic Kondo model for manganites

N. B. Perkins, N. M. Plakida

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

We calculate the dynamic spin susceptibility in the generalized Kondo model describing the interaction between the band eg electrons and the localized t2g electrons coupled via the antiferromagnetic exchange. We show that the spin-wave spectrum in the ferromagnetic phase has acoustic and optical branches in the mean-field approximation. We evaluate the self-energy corrections to the spectrum and estimate the damping of acoustic magnons.

Original languageEnglish (US)
Pages (from-to)1182-1193
Number of pages12
JournalTheoretical and Mathematical Physics
Volume120
Issue number3
DOIs
StatePublished - Sep 1999

Bibliographical note

Funding Information:
Acknowledgments. The authors thank Yu. A. Tserkovnikov and G. V. Jackeli for the useful discussions. This work was supported by INTAS (Grant Nos. 97-0963 and No. 97-11066).

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