Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Raman scattering investigation of the electron-phonon coupling in
  superconducting Nd(O,F)BiS$_2$   We have performed polarized Raman scattering measurements on the newly
discovered superconductor Nd(O,F)BiS$_2$ ($T_c = 4$ K). We observe 2 Raman
active modes, with frequencies in accordance with first-principles
calculations. One A$_{1g}$ phonon mode at 112.4 cm$^{-1}$ exhibits a Fano line
shape due to electron-phonon coupling. We find a resonance for this mode at
2.45 eV excitation energy. We estimate a 0.68 contribution of this mode to the
electron-phonon coupling constant $\lambda$. Our Raman results suggest that the
BiS$_2$-based superconductors are possibly phonon-mediated BCS superconductors.

2
The categories of this paper are: math
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
14
The categories of this paper are: math-ph