二维反铁磁体中阻挫诱导的类Peierls转变
强关联电子
2009-11-07 v1
摘要
我们表明,在自旋1/2二维(2D)正方晶格反铁磁Heisenberg模型中,通过次近邻交换相互作用引入阻挫,当自旋与绝热声子耦合时,可导致从四方相到正交相的类Peierls转变。两种不同的正交基态定义了一个Ising序参量,预期该序参量会导致有限温度转变。将讨论该模型首次实现材料的意义。
引用
@article{arxiv.cond-mat/0206127,
title = {Peierls-like transition induced by frustration in a two-dimensional antiferromagnet},
author = {Federico Becca and Frederic Mila},
journal= {arXiv preprint arXiv:cond-mat/0206127},
year = {2009}
}
备注
4 pages, to be published on Physical Review Letters