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arXiv 1302.3725cond-mat.stat-mech
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人工自旋冰的热相变

Thermal phase transitions in Artificial Spin-Ice

Demian Levis, Leticia F. Cugliandolo, Laura Foini, Marco Tarzia

摘要:

我们使用十六顶点模型来描述二维人工自旋冰(ASI)。我们发现在15个不同的生长样本和模型的预测顶点密度之间的协议。我们的结果表明,样品通常是在热平衡远离临界点分离的无序和反铁磁相的模型。我们预测的二阶相变表明,在近临界ASI的顶点的空间排列应进行更详细的研究,以验证它们是否显示出预期的空间和时间的长程相关性。

英文摘要:

We use the sixteen vertex model to describe bi-dimensional artificial spin ice (ASI). We find excellent agreement between vertex densities in fifteen differently grown samples and the predictions of the model. Our results demonstrate that the samples are in usual thermal equilibrium away from a critical point separating a disordered and an anti-ferromagnetic phase in the model. The second-order phase transition that we predict suggests that the spatial arrangement of vertices in near-critical ASI should be studied in more detail in order to verify whether they show the expected space and time long-range correlations.

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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