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arXiv 1602.04508cond-mat.dis-nncond-mat.stat-mech
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无序化一级相变的临界行为

Emerging critical behavior at a first-order phase transition rounded by disorder

Ahmed K. Ibrahim, Thomas Vojta

摘要:

利用大规模蒙特卡罗模拟研究了二维四色Ashkin-Teller模型。我们证明了一级相变的清洁系统被破坏的随机无序通过网站稀释。新兴的连续过渡的临界行为属于干净的二维伊辛普适类,除了对数修正。这些结果证实了微扰重整化群的预测,他们也同意最近的研究结果的三色的情况下,表明临界行为是普遍的。

英文摘要:

We investigate the two-dimensional four-color Ashkin-Teller model by means of large-scale Monte-Carlo simulations. We demonstrate that the first-order phase transition of the clean system is destroyed by random disorder introduced via site dilution. The critical behavior of the emerging continuous transition belongs to the clean two-dimensional Ising universality class, apart from logarithmic corrections. These results confirm perturbative renormalization-group predictions; they also agree with recent findings for the three-color case, indicating that the critical behavior is universal.

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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