Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Correlated evolution of structure and mechanical loss of a sputtered
  silica film   Energy dissipation in amorphous coatings severely affects high-precision
optical and quantum transducers. In order to isolate the source of coating
loss, we performed an extensive study of Raman scattering and mechanical loss
of a thermally-treated sputtered silica coating. Our results show that loss is
correlated with the population of three-membered rings of Si-O$_4$ tetrahedral
units, and support the evidence that thermal treatment reduces the density of
metastable states separated by a characteristic energy of about 0.5 eV, in
favour of an increase of the states separated by smaller activation energies.
Finally, we conclude that three-fold rings are involved in the relaxation
mechanisms only if they belong to more complex chain-like structures of 10 to
100 tetrahedra.

5
The categories of this paper are: gr-qc
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th