Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Synchrotron powder X-ray diffraction and structural analysis of
  Eu0.5La0.5FBiS2-xSex   Eu0.5La0.5FBiS2-xSex is a new BiS2-based superconductor system. In
Eu0.5La0.5FBiS2-xSex, electron carriers are doped to the BiS2 layer by the
substitution of Eu by La. Bulk superconductivity in this system is induced by
increasing the in-plane chemical pressure, which is controlled by the Se
concentration (x). In this study, we have analysed the crystal structure of
Eu0.5La0.5FBiS2-xSex using synchrotron powder diffraction and the Rietveld
refinement. The precise determination of the structural parameters and thermal
factors suggest that the emergence of bulk superconductivity in
Eu0.5La0.5FBiS2-xSex is achieved by the enhanced in-plane chemical pressure and
the decrease in in-plane disorder.

19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph