Magnetocaloric effect in integrable spin-s chains
Statistical Mechanics
2011-09-19 v1 Strongly Correlated Electrons
Abstract
We study the magnetocaloric effect for the integrable antiferromagnetic high-spin chain. We present an exact computation of the Gr\"uneisen parameter, which is closely related to the magnetocaloric effect, for the quantum spin-s chain on the thermodynamical limit by means of Bethe ansatz techniques and the quantum transfer matrix approach. We have also calculated the entropy S and the isentropes in the (H,T) plane. We have been able to identify the quantum critical points H_c^{(s)}=2/(s+1/2) looking at the isentropes and/or the characteristic behaviour of the Gr\"uneisen parameter.
Keywords
Cite
@article{arxiv.1009.4411,
title = {Magnetocaloric effect in integrable spin-s chains},
author = {G. A. P. Ribeiro},
journal= {arXiv preprint arXiv:1009.4411},
year = {2011}
}
Comments
6 pages, 3 figures