Spin-wave Hamiltonian in double-exchange systems
Strongly Correlated Electrons
2007-05-23 v1 Statistical Mechanics
Abstract
A simple derivation of the effective spin-wave Hamiltonian for a double-exchange system with infinitely large Hund's-rule coupling is demonstrated. The formalism can be applied to models with arbitrary range of hopping as well as those with randomness. The result shows that, within the leading order of the 1/S expansion, one magnon excitation spectrum can be described by the Heisenberg model.
Keywords
Cite
@article{arxiv.cond-mat/0210333,
title = {Spin-wave Hamiltonian in double-exchange systems},
author = {Nobuo Furukawa and Yukitoshi Motome},
journal= {arXiv preprint arXiv:cond-mat/0210333},
year = {2007}
}
Comments
2 pages, to be published in Physica B (Proc. to LT23)