准一维量子螺旋磁体:多极相的命运
强关联电子
2015-11-25 v2
摘要
利用密度矩阵重整化群、硬核玻色子和自旋波理论方法,研究了高磁场下由铁磁-反铁磁J1-J2海森堡模型描述的耦合阻挫自旋-1/2链。与磁振子束缚态相关的多极相会被弱的反铁磁(铁磁)链间耦合Jic破坏(支持)。我们表明,LiVCuO4中可能存在量子向列相,而对于Li(Na)Cu2O2,由于存在较大的反铁磁Jic,该相被抑制。同样,对于具有较小反铁磁Jic的Li2ZrCuO4,预期的三重或四重相也不太可能出现。我们发现,即使相对较小的Jic也会显著影响饱和场。
引用
@article{arxiv.1005.5500,
title = {Quasi-1d quantum helimagnets: The fate of multipolar phases},
author = {S. Nishimoto and S. -L. Drechsler and R. Kuzian and J. Richter and J. van den Brink},
journal= {arXiv preprint arXiv:1005.5500},
year = {2015}
}
备注
5 pages, 4 figures, as compared with the 1st version: new title, inclusion of 2D-phase diagrams, as well as addition of exact hard core boson results for nematics