Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Raman spectrum and charge fluctuations in the copper-oxide
  superconductors   The effect of the charge fluctuations on the electronic spectrum and the
Raman spectrum of high temperature superconductors is examined within the slave
boson approach. Instead of using the saddle point approximation for slave
bosons, we confine ourselves to the non-crossing approximation (NCA) in summing
the diagrams for the Green functions, thus obtaining the renormalized hole
spectrum and its lifetime on equal footing. The electronic Raman spectrum is
calculated, showing the characteristic featureless behaviour up to the
frequency of the order of renormalized $\Delta_{pd}$ parameter. The dependence
on the polarization of the incident and the scattered light agrees with
experiments.

36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs