Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Kinetic limitation of chemical ordering in Bi$_2$Te$_{3-x}$Se$_x$ layers
  grown by molecular beam epitaxy   We study the chemical ordering in Bi$_2$Te$_{3-x}$Se$_x$ grown by molecular
beam epitaxy on Si substrates. We produce films in the full composition range
from x = 0 to 3, and determine their material properties using energy
dispersive X-ray spectroscopy, X-ray diffraction and Raman spectroscopy. By
fitting the parameters of a kinetic growth model to these results, we obtain a
consistent description of growth at a microscopic level. Our main finding is
that despite the incorporation of Se in the central layer being much more
probable than that of Te, the formation of a fully ordered Te-Bi-Se-Bi-Te layer
is prevented by kinetic of the growth process. Indeed, the Se concentration in
the central layer of Bi$_2$Te$_2$Se$_1$ reaches a maximum of only $\approx$ 75%
even under ideal growth conditions. A second finding of our work is that the
intensity ratio of the 0 0 12 and 0 0 6 X-ray reflections serves as an
experimentally accessible quantitative measure of the degree of ordering in
these films.

16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
3
The categories of this paper are: physics
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess