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arXiv 2008.13258cond-mat.stat-mech
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三维伊辛模型粗糙相的尺度效应

Finite-size effects in the rough phase of the 3d Ising model

Walter Selke

摘要:

采用蒙特卡罗模拟,研究了立方晶格上含$L\times L\times R$位的Ising粗糙相界面性质的有限尺寸效应.特别是,垂直于尺寸L $\times$ R的平坦界面的磁化曲线进行了研究,其中$L$在(预)临界温度范围内显著大于$R$。由此产生的$R$依赖性进行比较与预测的标准毛细波理论,在高斯近似,并与场论的基础上有效的弦行动,为$L$ = $\infty$。

英文摘要:

Using Monte Carlo simulations, finite-size effects of interfacial properties in the rough phase of the Ising on a cubic lattice with $L\times L\times R$ sites are studied. In particular, magnetization profiles perpendicular to the flat interface of size L$\times$R are studied, with $L$ being considerably larger than $R$, in the (pre)critical temperature range. The resulting $R$-dependences are compared with predictions of the standard capillary-wave theory, in the Gaussian approximation, and with a field theory based on effective string actions, for $L$=$\infty$.

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