Spin-Wave-Spin-Wave Interaction and the Thermodynamics of the Heisenberg Spin Chain
Condensed Matter
2007-05-23 v1 High Energy Physics - Lattice
High Energy Physics - Theory
Abstract
The low-temperature free energy of the spin S quantum Heisenberg ferromagnetic chain in a strong magnetic field is obtained in a two-particle approximation by using exact solution of two-spin-wave problem. The result is beyond the perturbation theory because it incorporates the both bound and scattering state contributions, and the scattering effect is essential as well as the bound state one. In particular the main temperature renormalization of an exchange constant is found to be linear in temperature instead corresponded to the perturbation theory result.
Keywords
Cite
@article{arxiv.cond-mat/9312038,
title = {Spin-Wave-Spin-Wave Interaction and the Thermodynamics of the Heisenberg Spin Chain},
author = {Michael Teitelman},
journal= {arXiv preprint arXiv:cond-mat/9312038},
year = {2007}
}
Comments
6 pages, REVTEX