Low-Energy Structure of Heisenberg Ferrimagnetic Spin Chains
Statistical Mechanics
2009-10-31 v1
Abstract
Static and dynamic structure factors of Heisenberg ferrimagnetic spin chains are numerically investigated. There exist two distinct branches of elementary excitations, which exhibit ferromagnetic and antiferromagnetic aspects. The ferromagnetic feature is smeared out with the increase of temperature, whereas the antiferromagnetic one persists up to higher temperatures. The scattering intensity is remarkably large at lower boundaries of the ferromagnetic and antiferromagnetic spectra. All these observations are consistent with the ferromagnetic-to-antiferromagnetic crossover in the thermal behavior which has recently been reported.
Keywords
Cite
@article{arxiv.cond-mat/9810113,
title = {Low-Energy Structure of Heisenberg Ferrimagnetic Spin Chains},
author = {Shoji Yamamoto and Toru Sakai},
journal= {arXiv preprint arXiv:cond-mat/9810113},
year = {2009}
}
Comments
3 pages, 5 PS figures, to appear in J. Phys. Soc. Jpn. Vol. 67, No. 11 (1998)