Quantum and thermal effects in the double exchange ferromagnet
Abstract
The physics of the ferromagnetic phase of the ``double exchange'' model has been widely discussed in the context of the CMR manganites. Usually, the double exchange ferromagnet is treated is classically, by mapping it onto an effective Heisenberg model. However this mapping does not permit a correct treatment of quantum or thermal fluctuation effects, and the results obtained lack many of the interesting features seen in experiments on the manganites. Here we outline a new analytic approach to systematically evaluating quantum and thermal corrections to the magnetic and electronic properties of the double exchange ferromagnet.
Keywords
Cite
@article{arxiv.cond-mat/0405189,
title = {Quantum and thermal effects in the double exchange ferromagnet},
author = {Nic Shannon},
journal= {arXiv preprint arXiv:cond-mat/0405189},
year = {2015}
}
Comments
4 pages summary of results for spin excitations in DE model with a few comments on associated electronic physics (from talk given at European Conference on Physics of Magnetism, Poznan 2002)