ONE-DIMENSIONAL SU(4) SPIN-ORBITAL MODEL : A LOW-ENERGY EFFECTIVE THEORY
ONE-DIMENSIONAL SU(4) SPIN-ORBITAL MODEL : A LOW-ENERGY EFFECTIVE THEORY
复制标题
一维 SU(4) 自旋轨道模型：一种低能有效理论
DOI：
10.1103/physrevlett.83.624
复制
发表时间：
1999
影响因子：
8.6
通讯作者：
A. Nersesyan
中科院分区：
文献类型：
--
作者：
P. Azaria;A. O. Gogolin;P. Lecheminant;A. Nersesyan
利用阿贝尔玻色化方法研究了一维自旋轨道模型。我们导出了低能有效理论，它使我们能够研究SU（4）对称点的小偏差。我们证明了存在一个无质量区域，其相关函数为代数衰减函数<$cos [（π/2 a 0）x] x− 3/2。当进入大质量相时，系统显示出近似SO（6）扩大的对称性，具有由交替的自旋和轨道单线态组成的二聚类型的有序。
The one-dimensional spin-orbital model is studied by means of Abelian bosonization. We derive the low-energy effective theory which enables us to study small deviations from the SU (4) symmetric point. We show that there exists a massless region with algebraically decaying correlation functions∼ cos [(π/2 a 0) x] x− 3/2. When entering the massive phase, the system displays an approximate SO (6) enlarged symmetry with a dimerization type of ordering consisting in alternating spin and orbital singlets.