Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Lorenz function of Bi$_{2}$Te$_{3}$/Sb$_{2}$Te$_{3}$ superlattices   Combining first principles density functional theory and semi-classical
Boltzmann transport, the anisotropic Lorenz function was studied for
thermoelectric Bi$_{2}$Te$_{3}$/Sb$_{2}$Te$_{3}$ superlattices and their bulk
constituents. It was found that already for the bulk materials Bi$_{2}$Te$_{3}$
and Sb$_{2}$Te$_{3}$, the Lorenz function is not a pellucid function on charge
carrier concentration and temperature. For electron-doped
Bi$_{2}$Te$_{3}$/Sb$_{2}$Te$_{3}$ superlattices large oscillatory deviations
for the Lorenz function from the metallic limit were found even at high charge
carrier concentrations. The latter can be referred to quantum well effects,
which occur at distinct superlattice periods.

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The categories of this paper are: acc-phys
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The categories of this paper are: supr-con
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The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
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The categories of this paper are: eess
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-lat
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The categories of this paper are: comp-gas
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The categories of this paper are: dg-ga