Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effects of magnetism and doping on the electron-phonon coupling in
  BaFe$_{2}$As$_{2}$   We calculate the effect of local magnetic moments on the electron-phonon
coupling in BaFe$_{2}$As$_{2}+\delta$ using the density functional perturbation
theory. We show that the magnetism enhances the total electron-phonon coupling
by $\sim 50%$, up to $\lambda \lesssim 0.35$, still not enough to explain the
high critical temperature, but strong enough to have a non-negligible effect on
superconductivity, for instance, by frustrating the coupling with spin
fluctuations and inducing order parameter nodes. The enhancement comes mostly
from a renormalization of the electron-phonon matrix elements. We also
investigate, in the rigid band approximation, the effect of doping, and find
that $\lambda$ versus doping does not mirror the behavior of the density of
states; while the latter decreases upon electron doping, the former does not,
and even increases slightly.

7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
12
The categories of this paper are: nucl-th
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess