Case study of the uniaxial anisotropic spin-1 bilinear-biquadratic Heisenberg model on a triangular lattice
Case study of the uniaxial anisotropic spin-1 bilinear-biquadratic Heisenberg model on a triangular lattice
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三角晶格上单轴各向异性 spin-1 双线性双二次海森堡模型的案例研究
DOI：
10.1103/physrevb.90.144409
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发表时间：
2014
影响因子：
3.7
通讯作者：
Moreno-Cardoner M
中科院分区：
文献类型：
--
作者：
Moreno-Cardoner M
我们使用簇平均场 (CMF) 方法研究存在单轴各向异性场的三角晶格上的 spin-1 模型。反铁磁交换、晶格几何和各向异性之间的相互作用迫使古茨维勒平均场方法在相图的某个区域失败。在那里，CMF 方法产生与 spin-1 系统映射到的 XXZ 模型中存在的相兼容的两个超固相。在这两个超固体相之间，三亚晶格顺序被打破，CMF 方法的结果在很大程度上取决于团簇的几何形状和大小。我们讨论该区域中可能存在自旋液体。
We study the spin-1 model on a triangular lattice in the presence of a uniaxial anisotropy field using a cluster mean-field (CMF) approach. The interplay among antiferromagnetic exchange, lattice geometry, and anisotropy forces Gutzwiller mean-field approaches to fail in a certain region of the phase diagram. There, the CMF method yields two supersolid phases compatible with those present in theXXZ model onto which the spin-1 system maps. Between these two supersolid phases, the three-sublattice order is broken and the results of the CMF approach depend heavily on the geometry and size of the cluster. We discuss the possible presence of a spin liquid in this region.