Interacting double dimer model on the square lattice

Interacting double dimer model on the square lattice
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方格上相互作用的双二聚体模型

DOI:
10.1103/physrevb.102.174431
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发表时间:
2020
期刊:
影响因子:
3.7
通讯作者:
Wilkins N
Wilkins N
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Wilkins N

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我们研究了由经典二聚体模型的两个耦合副本组成的方形晶格双二聚体模型的相和跃迁。在立方晶格上,我们发现了从库仑相(一种无序但相关的二聚体液体)到两个副本的波动彼此密切同步的相的热相变。令人惊讶的是,与立方情况相反,相边界包括非相互作用点,正如我们使用基于对称的有效高度理论分析所建立的那样,表明无穷小的耦合足以同步双二聚体模型。此外,我们观察到当副本之间的耦合是排斥时,一个新的反同步相,并使用蒙特卡罗模拟建立了完整的相图,包括(反)同步柱状相和交错相,每个副本中平行二聚体之间存在相互作用。
We study phases and transitions of the square-lattice double dimer model, consisting of two coupled replicas of the classical dimer model. As on the cubic lattice, we find a thermal phase transition from the Coulomb phase, a disordered but correlated dimer liquid, to a phase where fluctuations of the two replicas are closely synchronized with one another. Surprisingly, and in contrast to the cubic case, the phase boundary includes the noninteracting point, as we establish using a symmetry-based analysis of an effective height theory, indicating that infinitesimal coupling is sufficient to synchronize the double dimer model. In addition, we observe a novel antisynchronized phase when the coupling between replicas is repulsive, and use Monte Carlo simulations to establish the full phase diagram, including (anti)synchronized columnar and staggered phases, with interactions between parallel dimers in each replica.
DOI: 10.1103/physrevb.99.144403
发表时间: 2019
期刊: Physical Review B
影响因子: 3.7
作者:
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