Abstract

Phase transitions in the two-dimensional slightly diluted Potts model on a square lattice at q = 5 have been studied using the computer simulation method. The systems with linear sizes L × L = N, L = 10–120 are considered. It is shown based on the forth-order Binder cumulants and using the histogram analysis of the data that the introduction of nonmagnetic impurities to a spin system described by the two-dimensional Potts model with q = 5 leads to a change of the first-order phase transition to a second-order phase transition.

中文翻译：

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二维轻微稀释的五顶点Potts模型中的相变

摘要

使用计算机仿真方法研究了在q = 5的方格上二维稍微稀释的Potts模型中的相变。考虑线性尺寸为L × L = N，L = 10–120的系统。根据四阶Binder累积量并使用数据的直方图分析显示，将非磁性杂质引入由q = 5的二维Potts模型描述的自旋系统会导致一阶变化从相变到二阶相变。