Dynamical effects of phonons on soliton binding in spin-Peierls systems
Strongly Correlated Electrons
2009-10-31 v2
Abstract
The role of dynamical magneto-elastic coupling in spin-Peierls chains is investigated by numerical and analytical techniques. We show that a Heisenberg spin chain coupled to dynamical optical phonons exhibits a transition towards a spontaneously dimerized state in a wide range of parameter space. The low energy excitations are characterized as solitons. No binding between solitons occurs in the isolated spin-phonon chain and the dynamical spin structure factor shows a broad magnon dispersion. However, elastic interchain coupling can lead to the formation of bound states.
Cite
@article{arxiv.cond-mat/9802053,
title = {Dynamical effects of phonons on soliton binding in spin-Peierls systems},
author = {D. Augier and D. Poilblanc and E. Sorensen and I. Affleck},
journal= {arXiv preprint arXiv:cond-mat/9802053},
year = {2009}
}
Comments
5 pages, 3 figures, revised version