Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superconductivity in the Honeycomb-Lattice Pnictide SrPtAs   We report superconductivity in the honeycomb-lattice pnictide SrPtAs with Tc
= 2.4 K. To our knowledge, SrPtAs is the first superconducting pnictide with a
honeycomb lattice structure. Our finding opens up new playground to develop
pnictide superconductors with honeycomb lattices, in addition to square
lattices known in iron-based superconductors.

17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio