Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: CuAlTe$_2$: A promising bulk thermoelectric material   Transport properties of Cu-based chalcopyrite materials are presented using
the full potential linear augmented plane wave method and Boltzmann
Semi-classical theory. All the studied compounds appear to be direct band gap
semiconductors evaluated based on the Tran-Blaha modified Becke-Johnson
potential. The heavy and light band combination found near the valence band
maximum (VBM) drive these materials to possess good thermoelectric properties.
Among the studied compounds, CuAlTe$_2$ is found to be more promising, in
comparison with CuGaTe$_2$, which is reported to be an efficient thermoelectric
material with appreciable figure of merit. Another interesting fact about
CuAlTe$_2$ is the comparable thermoelectric properties possessed by both $n-$
type and $p-$ type carriers, which might attract good device applications and
are explained in detail using the electronic structure calculations.

22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an