高场下 kagome 反铁磁体的精确低温行为
统计力学
2007-05-23 v2 强关联电子
摘要
Low-energy degrees of freedom of a spin-1/2 kagome antiferromagnet in the vicinity of the saturation field are mapped to a hard-hexagon model on a triangular lattice. The latter model is exactly solvable. The presented mapping allows to obtain quantitative description of the magnetothermodynamics of a quantum kagome antiferromagnet up to exponentially small corrections as well as predict the critical behavior for the transition into a magnon crystal state. Analogous mapping is presented for the sawtooth chain, which is mapped onto a model of classical hard dimers on a chain.
引用
@article{arxiv.cond-mat/0405578,
title = {Exact low-temperature behavior of kagome antiferromagnet at high fields},
author = {M. E. Zhitomirsky and Hirokazu Tsunetsugu},
journal= {arXiv preprint arXiv:cond-mat/0405578},
year = {2007}
}
备注
5 pages, 2 figures, replaced with accepted version