Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Lorentz ratio of a compensated metal   A violation of the Wiedemann-Franz law in a metal can be quantified by
comparing the Lorentz ratio, $L=\kappa\rho/T$, where $\kappa$ is the thermal
conductivity and $\rho$ is the electrical resistivity, with the universal
Sommerfeld constant, $L_0=(\pi^2/3) (k_B/e)^2$. We obtain the Lorentz ratio of
a clean compensated metal with intercarrier interaction as the dominant
scattering mechanism by solving exactly the system of coupled integral
Boltzmann equations. The Lorentz ratio is shown to assume a particular simple
form in the forward-scattering limit: $L/L_0=\overline{\Theta^2}/2$, where
$\Theta$ is the scattering angle. In this limit, $L/L_0$ can be arbitrarily
small. We also show how the same result can be obtained without the benefit of
an exact solution. We discuss how a strong downward violation of the
Wiedemann-Franz law in a type-II Weyl semimetal WP$_2$ can be explained within
our model.

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The categories of this paper are: astro-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-th
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The categories of this paper are: stat
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The categories of this paper are: mtrl-th
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The categories of this paper are: gr-qc
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The categories of this paper are: nlin
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
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The categories of this paper are: supr-con
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The categories of this paper are: hep-ex
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The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
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The categories of this paper are: acc-phys
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The categories of this paper are: adap-org
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The categories of this paper are: quant-ph