Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Are universal "anomalous" properties of glasses at low temperatures
  truly universal?   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.

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The categories of this paper are: funct-an
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The categories of this paper are: stat
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The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
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The categories of this paper are: solv-int
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The categories of this paper are: q-fin
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The categories of this paper are: physics
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The categories of this paper are: adap-org
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The categories of this paper are: chem-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-th
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The categories of this paper are: cs
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The categories of this paper are: plasm-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: patt-sol