中文

二维Heisenberg自旋系统SrCu_2(BO_3)_2的精确二聚体基态

强关联电子 2019-08-17 v4

摘要

SrCu_2(BO_3)_2的二维Heisenberg模型具有精确的二聚体基态,这在大约二十年前由Shastry和Sutherland证明。本文确定了从二聚体态到Néel有序态量子相变的临界值。对实验数据的分析表明,SrCu_2(BO_3)_2具有二聚体基态,但接近相变点,这导致了磁化率的反常温度依赖性。三重态激发的几乎局域化特性解释了在磁化曲线上观察到的平台。

关键词

引用

@article{arxiv.cond-mat/9807075,
  title  = {Exact dimer ground state of the two dimensional Heisenberg spin system SrCu_2(BO_3)_2},
  author = {Shin Miyahara and Kazuo Ueda},
  journal= {arXiv preprint arXiv:cond-mat/9807075},
  year   = {2019}
}

备注

4 pages, 5 figures, to appear in PRL