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摘要翻译：
我们研究了带有侧链的受挫混合自旋链，其中自旋物种和交换相互作用在空间上是变化的。对该模型建立了非线性sigma模型方法，得到了典型情况下具有两个无序自旋间隙相的相图。其中，我们详细研究了主链由自旋1和自旋1/2位点交替排列组成的情况，以及侧链由单个自旋1/2位点组成的情况。基于数值、微扰和变分方法，我们提出了每个相的单重态团簇固体图象，其中基态表示为局部单重态的张量积。
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英文标题：
《Disordered ground states in a quantum frustrated spin chain with side
chains》
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作者：
Ken'ichi Takano and Kazuo Hida
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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：
We study a frustrated mixed spin chain with side chains, where the spin species and the exchange interactions are spatially varied. A nonlinear sigma model method is formulated for this model, and a phase diagram with two disordered spin-gap phases is obtained for typical cases. Among them we examine the case with a main chain consisting of an alternating array of spin-1 and spin-1/2 sites and side chains each of a single spin-1/2 site in great detail. Based on numerical, perturbational, and variational approaches, we propose a singlet cluster solid picture for each phase, where the ground state is expressed as a tensor product of local singlet states.
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PDF链接：
https://arxiv.org/pdf/710.3457
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