Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superconductivity with Topological non-trivial surface states in NbC   Quantum materials with non-trivial band topology and bulk superconductivity
are considered superior materials to realize topological superconductivity. In
this regard, we report detailed Density Functional Theory (DFT) calculations
and Z2 invaraints for the NbC superconductor, exhibiting its band structure to
be topologically non-trivial. Bulk superconductivity at 8.9K is confirmed
through DC magnetization measurements under Field Cooled (FC) and Zero Field
Cooled (ZFC) protocols. This superconductivity is found to be of type-II nature
as revealed by isothermal M-H measurements and thus calculated the
Ginzberg-Landau parameter. A large intermediate state is evident from the phase
diagram, showing NbC to be a strong type-II superconductor. Comparing with
earlier reports on superconducting NbC, a non-monotonic relationship of
critical temperature with lattice parameters is seen. In conclusion, NbC is a
type-II around 10K superconductor with topological non-trivial surface states.

15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga