Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: First-principles-based $\pm s$-wave modelling for iron-based
  superconductors:Studies for specific heat and nuclear magnetic relaxation
  rate   In order to consistently explain controversial experimental results on
superconducting states observed by different probes in typical iron-based
superconductors, we construct a realistic multi-band $\pm s$-wave pairing model
by combining the quasiclassical formalism with the first-principles
calculation. The model successfully resolves the controversies in contrast to
the fact that simplified models such as two-band $\pm s$-wave one fail to do. A
key in the model is the existence of relatively small gaps which leads to
material-dependent peculiarities.

11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
3
The categories of this paper are: physics
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys