Haldane 间隙自旋链作为卢ting 液体：有限磁场下的关联函数
强关联电子
2009-11-07 v2 统计力学
摘要
我们研究了在磁场超过自旋间隙的条件下，Heisenberg、抗磁性、整数自旋链的行为。在温度远低于间隙时，自旋链表现出卢ting 液体行为。我们精确计算了相应的卢ting 参数以及作为磁场函数的费米速度。这使得我们能够计算多个关联函数，从而推导自旋电导、与中子无穷散射实验相关的动力学结构因子，以及 NMR 松弛速率。我们还讨论了磁场诱导的无间隙相对有限温度和相邻链之间有限耦合的鲁棒性。
引用
@article{arxiv.cond-mat/0106037,
title = {Haldane-Gapped Spin Chains as Luttinger Liquids: Correlation Functions at Finite Field},
author = {Robert M. Konik and Paul Fendley},
journal= {arXiv preprint arXiv:cond-mat/0106037},
year = {2009}
}
备注
32 pages, 8 figures; published version includes additions discussing the robustness of the magnetically induced gapless phase to ordering between chains as well as the relationship between the spin-1 chains and spin-1/2 ladders in the presence of a magnetic field