Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nature and Raman signatures of the Higgs amplitude mode in the
  coexisting superconducting and charge-density-wave state   We investigate the behavior of the Higgs (amplitude) mode when
superconductivity emerges on a preexisting charge-density-wave state. We show
that the weak overdamped square-root singularity of the amplitude fluctuations
in a standard BCS superconductor is converted in a sharp, undamped power-law
divergence in the coexisting state, reminiscent of the Higgs behavior in
Lorentz-invariant theories. This effect reflects in a strong superconducting
resonance in the Raman spectra, both for an electronic and a phononic mechanism
leading to the Raman visibility of the Higgs. In the latter case, our results
are relevant to the interpretation of the Raman spectra measured experimentally
in NbSe2.

28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph