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arXiv 1407.6322cond-mat.dis-nncond-mat.stat-mech
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非晶边界条件下过冷液体中的Specific heat反常

Specific heat anomaly in a supercooled liquid with amorphous boundary conditions

Daniel A. Martin, Andrea Cavagna, Tomas S. Grigera

摘要:

研究了球形空腔中具有非晶边界条件的模型过冷液体的比热。我们发现平衡比热随温度的变化有一个依赖于腔体尺寸的峰值。空腔允许我们进行有限尺寸标度(FSS)分析,这表明峰值持续在热力学极限的有限温度。我们试图根据不同的理论场景将数据折叠到FSS曲线上,在两种情况下获得合理的结果:具有非标准指数α和ν值的“不那么简单”的液体,以及具有两种不同长度尺度的随机一阶理论。

英文摘要:

We study the specific heat of a model supercooled liquid confined in a spherical cavity with amorphous boundary conditions. We find the equilibrium specific heat has a cavity-size-dependent peak as a function of temperature. The cavity allows us to perform a finite-size scaling (FSS) analysis, which indicates that the peak persists at a finite temperature in the thermodynamic limit. We attempt to collapse the data onto a FSS curve according to different theoretical scenarios, obtaining reasonable results in two cases: a "not-so-simple" liquid with nonstandard values of the exponents α and ν, and random first-order theory, with two different length scales.

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