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arXiv 1704.03350cond-mat.stat-mech
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一级相变动力学标度理论的有力证据

Compelling evidence for the theory of dynamic scaling in first-order phase transitions

Fan Zhong

摘要:

物质表现出阶段和它们的过渡。这些相变分为一阶相变和连续相变。虽然后者有一个完善的重整化群理论,但前者只能由经典成核理论定性地解释,因为它们的预测往往与实验相差几个数量级。一个理论,以整合FOPT的重整化群理论的框架已被提出,但似乎与现存的智慧相矛盾。在这里,我们首先表明,经典的成核和生长理论本身不能解释FOPT的范式二维伊辛模型驱动线性变化的外部施加的字段。然后,我们提供了令人信服的证据表明,过渡同意与重整化群理论时,适当考虑对数修正。这统一了两类跃迁的理论,FOPT可以使用类似于连续对应物的普适性和标度来研究。

英文摘要:

Matter exhibits phases and their transitions. These transitions are classified as first-order phase transitions (FOPTs) and continuous ones. While the latter has a well-established theory of the renormalization group, the former is only qualitatively accounted for by classical theories of nucleation, since their predictions often disagree with experiments by orders of magnitude. A theory to integrate FOPTs into the framework of the renormalization-group theory has been proposed but seems to contradict with extant wisdom. Here we show first that classical nucleation and growth theories alone cannot explain the FOPTs of the paradigmatic two-dimensional Ising model driven by linearly varying an externally applied field. Then we offer compelling evidence that the transitions agree well with the renormalization-group theory when logarithmic corrections are properly considered. This unifies the theories for both classes of transitions and FOPTs can be studied using universality and scaling similar to their continuous counterpart.

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