Vortices in Quantum Spin Systems
凝聚态物理
2007-05-23 v2 斑图形成与孤子
patt-sol
量子物理
摘要
We examine spin vortices in ferromagnetic quantum Heisenberg models with planar anisotropy on two-dimensional lattices. The symmetry properties and the time evolution of vortices built up from spin-coherent states are studied in detail. Although these states show a dispersion typical for wave packets, important features of classical vortices are conserved. Moreover, the results on symmetry properties provide a construction scheme for vortex-like excitations from exact eigenstates, which have a well-controlled time evolution. Our approach works for arbitrary spin length both on triangular and square lattices.
引用
@article{arxiv.cond-mat/9809401,
title = {Vortices in Quantum Spin Systems},
author = {John Schliemann and Franz G. Mertens},
journal= {arXiv preprint arXiv:cond-mat/9809401},
year = {2007}
}
备注
Remarks added and conclusions enlarged, version to be published in European Physical Journal B