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摘要翻译：
最近的理论研究提出了在S=1三角形晶格化合物NiGa_2S_4中实现自旋向列态的可能性。利用密度矩阵重整化群方法和精确对角化方法研究了zig-zag几何中的双线性双二次自旋1链。我们给出了聚焦于反铁磁相互作用的相图。在已知的霍尔丹-双霍尔丹和具有主导自旋向列关联的扩展临界相附近，我们发现了一个具有非消失能隙的三聚相。我们讨论了不同序参量、能隙、关联函数和中心电荷的结果，并将其与场理论对相图的预测联系起来。
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英文标题：
《Spontaneous trimerization in a bilinear-biquadratic S=1 zig-zag chain》
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作者：
Philippe Corboz, Andreas M. Laeuchli, Keisuke Totsuka, Hirokazu
Tsunetsugu
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最新提交年份：
2008
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分类信息：
一级分类：Physics 物理学
二级分类：Strongly Correlated Electrons 强关联电子
分类描述：Quantum magnetism, non-Fermi liquids, spin liquids, quantum criticality, charge density waves, metal-insulator transitions
量子磁学，非费米液体，自旋液体，量子临界性，电荷密度波，金属-绝缘体跃迁
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一级分类：Physics 物理学
二级分类：Statistical Mechanics 统计力学
分类描述：Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变，热力学，场论，非平衡现象，重整化群和标度，可积模型，湍流
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英文摘要：
Recent theoretical studies raised the possibility of a realization of spin nematic states in the S=1 triangular lattice compound NiGa_2S_4. We study the bilinear-biquadratic spin 1 chain in a zig-zag geometry by means of the density matrix renormalization group method and exact diagonalization. We present the phase diagram focusing on antiferromagnetic interactions. Adjacent to the known Haldane-double Haldane and the extended critical phase with dominant spin nematic correlations we find a trimerized phase with a nonvanishing energy gap. We discuss results for different order parameters, energy gaps, correlation functions, and the central charge, and make connection to field theoretical predictions for the phase diagram.
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PDF链接：
https://arxiv.org/pdf/707.1195
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