Spin-wave theory for dimerized ferromagnetic chains
Strongly Correlated Electrons
2010-05-20 v1
Abstract
We describe a Peierls dimerization which occurs in ferromagnetic spin chains at finite temperature, within the modified spin-wave theory. Usual spin-wave theory is modified by introducing a Lagrange multiplier which enforces a nonmagnetic state at finite temperature. It is shown that this method gives results in excellent agreement with the density--matrix renormalization group applied to transfer matrices for dimerized ferromagnetic chains. We study bond correlation functions and explore the characteristic features of dimerization in the specific heat.
Cite
@article{arxiv.0906.1758,
title = {Spin-wave theory for dimerized ferromagnetic chains},
author = {Alexander Herzog and Peter Horsch and Andrzej M. Oles and Jesko Sirker},
journal= {arXiv preprint arXiv:0906.1758},
year = {2010}
}
Comments
4 pages, 2 figures