Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ubiquitous enhancement of nematic fluctuations across the phase diagram
  of iron based superconductors probed by the Nernst effect   The role of nematic fluctuations for unconventional superconductivity has
been subject of intense discussions for many years. In iron-based
superconductors, the most established probe for electronic-nematic
fluctuations, i.e. the elastoresistivity seems to imply that superconductivity
is reinforced by electronic-nematic fluctuations, since the elastoresistivity
amplitude peaks at or close to optimal $T_C$. However, on the over-doped side
of the superconducting dome, the diminishing elastoresistivity suggests a
negligible importance in the mechanism of superconductivity. Here we introduce
the Nernst coefficient as a genuine probe for electronic nematic fluctuations,
and we show that the amplitude of the Nernst coefficient tracks the
superconducting dome of two prototype families of iron-based superconductors,
namely Rh-doped $BaFe_{2}As_{2}$ and Co-doped $LaFeAsO$. Our data thus provide
fresh evidence that in these systems nematic fluctuations foster the
superconductivity throughout the phase diagram.

20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg