论文标题
低温下玻璃的通用“异常”特性真的是通用的吗？
Are universal "anomalous" properties of glasses at low temperatures truly universal?
论文作者
论文摘要
在低温下，玻璃的特定热CP和其他玻璃（从无定形固体到无序晶体）的特性与完全有序的晶体截然不同。几十年来，对眼镜的这种定性，甚至定量的普遍行为进行了彻底研究。但是，仍然缺乏对其起源和微观性质的清晰理解，不用说是一个封闭的理论。为了阐明此问题，我回顾了这项工作中的情况，主要是通过编译和讨论测量的许多眼镜和无序晶体的低温CP数据，并突出了“普遍性规则”的一些例外。因此，可以看到，与玻璃的其他低温特性相比，低温下“玻璃” CP过量的大小远非通用。更糟糕的是，某些没有明显疾病迹象的分子晶体在CP中表现出线性系数，大于许多无定形固体中的晶体，而后者的几个显示值可忽略不计。
The specific heat Cp and other properties of glasses (ranging from amorphous solids to disordered crystals) at low temperatures, are well known to be markedly different from those in fully-ordered crystals. For decades, this qualitative, and even quantitative, universal behavior of glasses has been thoroughly studied. However, a clear understanding of its origin and microscopic nature, needless to say a closed theory, is still lacking. To shed light on this matter, I review the situation in this work, mainly by compiling and discussing measured low-temperature Cp data of many glasses and disordered crystals, as well as highlighting a few exceptions to that "universality rule". Thus, one can see that, in contrast to other low-temperature properties of glasses, the magnitude of the "glassy" Cp excess at low temperature is far from being universal. Even worse, some molecular crystals without a clear sign of disorder exhibit linear coefficients in Cp larger than those found in many amorphous solids, whereas a few of the latter show negligible values.
