Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Use of similatity criteria for evaluating the thermoelectric figure of
  merit of superlattices   In this paper, general relationships that allow evaluating the figure of
merit of both two-dimensional superlattices and three-dimensional crystals with
a quadratic and isotropic energy spectrum of free charge carriers are derived.
It is shown that with the same values of the so-called dimensionless
temperature and scattering coefficient, the figure of merit of superlattices is
always lower than that of three-dimensional crystals. The figure of merit of
superlattices can become higher that that of three-dimensional crystals if the
dimensionless temperature of free charge carrier gas and (or) scattering
coefficient in them is considerably higher than in three-dimensional crystals.

28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs