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arXiv 1909.12944cond-mat.stat-mechcond-mat.dis-nn
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偶极Kagome Ising反铁磁体的平均场phase diagram和自旋玻璃相

Mean-field phase diagram and spin glass phase of the dipolar Kagome Ising antiferromagnet

Leticia F. Cugliandolo, Laura Foini, Marco Tarzia

摘要:

我们推导出了经典偶极伊辛反铁磁体在平均场水平上的平衡相图的几何形状,模仿的二维Kagome晶格。我们的平均场处理是基于簇变分Bethe-Peierls形式主义和腔方法的组合,在玻璃化转变的背景下开发的,并且是对[Phys. Rev. B 98,144439(2018)]中实现的蒙特卡罗模拟的补充。我们的研究结果证实了低温结晶相的性质,这是通过一个弱的一级相变。此外,它们使我们能够将Hamp等人的工作中观察到的动力学减慢解释为在平均场水平上发生的自旋玻璃跃迁的残余(并且预计在二维中可以避免)。

英文摘要:

We derive the equilibrium phase diagram of the classical dipolar Ising antiferromagnet at the mean-field level on a geometry that mimics the two dimensional Kagome lattice. Our mean-field treatment is based on the combination of the cluster variational Bethe-Peierls formalism and the cavity method, developed in the context of the glass transition, and is complementary to the Monte Carlo simulations realized in [Phys. Rev. B 98, 144439 (2018)]. Our results confirm the nature of the low temperature crystalline phase which is reached through a weakly first-order phase transition. Moreover, they allow us to interpret the dynamical slowing down observed in the work of Hamp & al. as a remnant of a spin glass transition taking place at the mean-field level (and expected to be avoided in 2 dimensions).

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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