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arXiv 1104.0467cond-mat.stat-mech
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蜂窝晶格上的单体-二聚体混合物

Monomer-Dimer Mixture on a Honeycomb Lattice

Hiromi Otsuka

摘要:

我们研究了一个定义在蜂窝晶格上的单体-二聚体混合物作为磁场中自旋冰系统的玩具模型。在单体的低掺杂区,该系统的有效描述给出了双sine-Gordon模型。在中等掺杂和强掺杂区域中,可以采用Potts格子气理论。综合这些结果,我们构造了一个重整化群流图,它包含了共形场论极小模型中对应于${\cal M}_5$和${\cal M}_6$的稳定和不稳定不动点.我们进行数值转移矩阵计算,以确定一个全球相图,也提供证据来检查我们的预测。

英文摘要:

We study a monomer-dimer mixture defined on a honeycomb lattice as a toy model for the spin ice system in a magnetic field. In a low-doping region of monomers, the effective description of this system is given by the dual sine-Gordon model. In intermediate- and strong-doping regions, the Potts lattice gas theory can be employed. Synthesizing these results, we construct a renormalization-group flow diagram, which includes the stable and unstable fixed points corresponding to ${\cal M}_5$ and ${\cal M}_6$ in the minimal models of the conformal field theory. We perform numerical transfer-matrix calculations to determine a global phase diagram and also to proffer evidence to check our prediction.

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。

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