Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Persistence of an Energy Scale in Over-Doped High-Tc Superconductors   Citing the disappearance of a sharp peak in the electron self-energy,
extracted from optics and angle-resolved photoemission spectroscopy (ARPES)
experiments in deeply over-doped copper-oxide superconductors with Tc of
55-60K, Hwang, Timusk et al. argue that sharp modes, be they phononic or
magnetic in origin, are not important for superconductivity in the cuprates. If
true, this would have been an important progress. We show, however, their
conclusions are unfounded because of the insensitivity of the optics experiment
in studying strongly anisotropic material like the cuprates, and a
misrepresentation of existing ARPES data. In an added note, we refute the claim
by Valla, Timusk et. al. that the doping level of the data presented in the
first part of this comment is lower than reported.

28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs