Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: NMR relaxation and rattling phonons in type-I Ba8Ga16Sn30 clathrate   Atomic motion of guest atoms inside semiconducting clathrate cages is
considered as an important source for the glasslike thermal behavior.69Ga and
71Ga Nuclear Magnetic Resonance (NMR) studies on type-I Ba8Ga16Sn30 show a
clear low temperature relaxation peak attributed to the influence of Ba
rattling dynamics on the framework-atom resonance, with a quadrupolar
relaxation mechanism as the leading contribution. The data are analyzed using a
two-phonon Raman process, according to a recent theory involving localized
anharmonic oscillators. Excellent agreement is obtained using this model, with
the parameters corresponding to a uniform array of localized oscillators with
very large anharmonicity.

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The categories of this paper are: gr-qc
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The categories of this paper are: quant-ph
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The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
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: adap-org
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
16
The categories of this paper are: stat