Spin Diffusion in Double-Exchange Manganites
Strongly Correlated Electrons
2009-11-07 v3 Materials Science
Abstract
The theoretical study of spin diffusion in double-exchange magnets by means of dynamical mean-field theory is presented. We demonstrate that the spin-diffusion coefficient becomes independent of the Hund's coupling JH in the range of parameters JH*S >> W >> T, W being the bandwidth, relevant to colossal magnetoresistive manganites in the metallic part of their phase diagram. Our study reveals a close correspondence as well as some counterintuitive differences between the results on Bethe and hypercubic lattices. Our results are in accord with neutron scattering data and with previous theoretical work for high temperatures.
Keywords
Cite
@article{arxiv.cond-mat/0207305,
title = {Spin Diffusion in Double-Exchange Manganites},
author = {A. L. Chernyshev and R. S. Fishman},
journal= {arXiv preprint arXiv:cond-mat/0207305},
year = {2009}
}
Comments
4.0 pages, 3 figures, RevTeX 4, replaced with the published version