Spin dynamics in the generalized ferromagnetic Kondo model for manganites

N. B. Perkins; N. M. Plakida

doi:10.1007/BF02557242

Spin dynamics in the generalized ferromagnetic Kondo model for manganites

N. B. Perkins, N. M. Plakida

Physics and Astronomy (Twin Cities)

Research output: Contribution to journal › Article › peer-review

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Abstract

We calculate the dynamic spin susceptibility in the generalized Kondo model describing the interaction between the band e_g electrons and the localized t_2g 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 language	English (US)
Pages (from-to)	1182-1193
Number of pages	12
Journal	Theoretical and Mathematical Physics
Volume	120
Issue number	3
DOIs	https://doi.org/10.1007/BF02557242
State	Published - 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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10.1007/BF02557242

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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.",

author = "Perkins, {N. B.} and Plakida, {N. M.}",

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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AU - Plakida, N. M.

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PY - 1999/9

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N2 - 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.

AB - 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.

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Spin dynamics in the generalized ferromagnetic Kondo model for manganites

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