arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2004.12954cond-mat.str-el
收藏

自旋为1/2的Kitaev-Heisenberg-Gamma链的phase diagram的综合研究

Comprehensive study of the phase diagram of the spin-1/2 Kitaev-Heisenberg-Gamma chain

Wang Yang, Alberto Nocera, Ian Affleck

摘要:

关于Kitaev材料的一个中心问题是Kitaev模型上的附加耦合的影响,Kitaev模型被提议为实现拓扑量子计算的候选者。然而,两个空间维度通常遭受缺乏可控方法的困难。在这项工作中,使用强大的分析和数值方法在一维的组合,我们进行了全面的研究的相图的一维版本的自旋1/2 Kitaev-Heisenberg-Gamma模型在其全参数空间。一个惊人的丰富的相图被发现有九个不同的阶段,包括四个Luttinger液相,铁磁相,Néel有序相,扭曲螺旋自旋排列的有序相,和两个有序相,这两个都打破了$D_3$对称性,虽然以不同的方式,其中$D_3$是六阶二面角群。我们的工作为研究一维Kitaev材料铺平了道路,并可能为高维情况下的物理提供线索。

英文摘要:

A central question on Kitaev materials is the effects of additional couplings on the Kitaev model which is proposed to be a candidate for realizing topological quantum computations. However, two spatial dimension typically suffers the difficulty of lacking controllable approaches. In this work, using a combination of powerful analytical and numerical methods available in one dimension, we perform a comprehensive study on the phase diagram of a one-dimensional version of the spin-1/2 Kitaev-Heisenberg-Gamma model in its full parameter space. A strikingly rich phase diagram is found with nine distinct phases, including four Luttinger liquid phases, a ferromagnetic phase, a Néel ordered phase, an ordered phase of distorted-spiral spin alignments, and two ordered phase which both break a $D_3$ symmetry albeit in different ways, where $D_3$ is the dihedral group of order six. Our work paves the way for studying one-dimensional Kitaev materials and may provide hints to the physics in higher dimensional situations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑