Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Thermal conductivity for III-V and II-VI semiconductor wurtzite and
  zinc-blende polytypes: the role of anharmonicity and phase space   We calculate the lattice thermal conductivity ($\kappa$) for cubic
(zinc-blende) and hexagonal (wurtzite) phases for 8 semiconductors using
$\textit{ab initio}$ calculations and solving the Phonon Boltzmann Transport
Equation, explaining the different behavior of the ratio $\kappa_{\rm
hex}/\kappa_{\rm cub}$ between the two phases. We show that this behavior
depends on the relative importance of two antagonistic factors: anharmonicity,
which we find to be always higher in the cubic phase; and the accessible phase
space, which is higher for the less symmetric hexagonal phase. Based on that,
we develop a method that predicts the most conducting phase---cubic or
hexagonal---where other more heuristic approaches fail. We also present results
for nanowires made of the same materials, showing the possibility to tune
$\kappa_{\rm hex}/\kappa_{\rm cub}$ over a wide range by modifying their
diameter, thus making them attractive materials for complex phononic and
thermoelectric applications/systems.

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The categories of this paper are: cs
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The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
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The categories of this paper are: dg-ga
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
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The categories of this paper are: econ
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The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
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The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol