Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Reduction of Phonon Lifetimes and Thermal Conductivity of a Carbon
  Nanotube on Amorphous Silica   We use molecular dynamics simulations to examine the phonon lifetimes in
(10,10) carbon nano-tubes (CNTs), both when isolated and when supported on
amorphous SiO2 substrates. We deter-mine the Umklapp, normal, boundary and
CNT-substrate phonon scattering rates from the com-puted inverse lifetimes.
Suspended CNTs have in-plane optical phonon lifetimes between 0.7-2 ps,
consistent with recent experiments, but contact with the substrate leads to a
lifetime reduction to the 0.6-1.3 ps range. The thermal conductivity of the
supported CNT is also computed to be ~30 percent lower than that of the
isolated CNT. The thermal boundary conductance estimated from the CNT-substrate
phonon scattering rates is in good agreement with that computed from the
Green-Kubo relation and with previous experimental results. The results
highlight that solid substrates can strongly affect and could be even used to
tune the thermal properties of CNTs.

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The categories of this paper are: nlin
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The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
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The categories of this paper are: astro-ph
19
The categories of this paper are: eess
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The categories of this paper are: hep-lat
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The categories of this paper are: hep-ph
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The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
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The categories of this paper are: adap-org
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The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
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The categories of this paper are: cs
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The categories of this paper are: atom-ph
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The categories of this paper are: gr-qc