Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Thermal Conductivity and Phonon Transport in Suspended Few-Layer
  Hexagonal Boron Nitride   The thermal conductivity of suspended few-layer hexagonal boron nitride
(h-BN) was measured using a micro-bridge device with built-in resistance
thermometers. Based on the measured thermal resistance values of 11-12 atomic
layer h-BN samples with suspended length ranging between 3 and 7.5 um, the
room-temperature thermal conductivity of a 11-layer sample was found to be
about 360 Wm-1K-1, approaching the basal plane value reported for bulk h-BN.
The presence of a polymer residue layer on the sample surface was found to
decrease the thermal conductivity of a 5-layer h-BN sample to be about 250
Wm-1K-1 at 300 K. Thermal conductivities for both the 5 layer and the 11 layer
samples are suppressed at low temperatures, suggesting increasing scattering of
low frequency phonons in thin h-BN samples by polymer residue.

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The categories of this paper are: econ
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The categories of this paper are: q-alg
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The categories of this paper are: ao-sci
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The categories of this paper are: gr-qc
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The categories of this paper are: physics
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The categories of this paper are: plasm-ph
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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: comp-gas
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The categories of this paper are: patt-sol
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The categories of this paper are: supr-con
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The categories of this paper are: solv-int
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The categories of this paper are: alg-geom
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The categories of this paper are: q-bio
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The categories of this paper are: eess