Spin Excitation Spectrum of La$_{1-x}A_x$MnO$_3$

Nobuo Furukawa

doi:10.1143/JPSJ.65.1174

Spin Excitation Spectrum of La$_{1-x}A_x$MnO$_3$

Condensed Matter 2009-10-28 v1

Authors: Nobuo Furukawa

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Abstract

As an effective model to describe perovskite-type manganates (La, $A$ )MnO $_3$ , the double-exchange model on a cubic lattice is investigated. Spin excitation spectrum of the model in the ground state is studied using the spin wave approximation. Spin wave dispersion relation observed in the inelastic neutron scattering experiment of La $_{0.7}$ Pb $_{0.3}$ MnO $_3$ is reproduced. Effective values for the electron bandwidth as well as Hund's coupling is estimated from the data.

Keywords

double-exchange model spin excitation spectrum spin wave approximation manganates neutron scattering Hund's coupling

Cite

@article{arxiv.cond-mat/9602017,
  title  = {Spin Excitation Spectrum of La$_{1-x}A_x$MnO$_3$},
  author = {Nobuo Furukawa},
  journal= {arXiv preprint arXiv:cond-mat/9602017},
  year   = {2009}
}

Comments

10 pages LaTeX including 4 PS figures

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