Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Co-intercalation of Ammonia molecules between FeSe layers in Ba-doped
  FeSe superconductor   We have synthesized a Ba-doped FeSe superconductor using liquid ammonia, and
investigated in detail the structure and composition of the Ba-FeSe phase. In
the superconducting phase, both the Tc and the shielding fraction are almost
unchanged even if the nominal composition of Ba is varied in the region from
0.3 to 0.7. The optimized Tc is 38.8 K. We have determined the structure of the
superconducting phase with X-ray powder diffraction (using synchrotron
radiation) and here describe the co-intercalation of Ba and NH3 molecules
between the FeSe layers.

6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph