Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Crossover from nematic to magnetic low-temperature ground state in
  Fe(Se,Te) compounds   A comparative analysis of the properties of FeSe${}_{1-x}$Te${}_{x}$ crystals
in the range of x values of about 0.4 and pure FeSe crystals is presented. We
found that the anomaly in R (T) at the structural transition for the former
differs significantly from the corresponding anomaly for the latter. This
indicates a change in the type of the ground state in the studied compounds.
Within the framework of the crystal field model, this can be explained as a
consequence of a change in the distortion of the tetrahedral environment of
iron, which leads to a change in the positions of the energy levels within
$t_{2g}$ multiplet. Depending on the mutual position of the degenerate xz and
yz levels and the xy level, the type of transition can change from orbital
ordering to magnetic ordering.

18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
34
The categories of this paper are: chem-ph