Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Phenomenological model of protected behavior in the cuprate
  superconductors   By extending previous work on the scaling of low frequency magnetic
properties of the 2-1-4 cuprates to the 1-2-3 materials, we arrive at a
consistent phenomenological description of protected behavior in the pseudogap
state of the magnetically underdoped cuprates. Between zero hole doping and a
doping level of $\sim 0.22$ it reflects the presence of a mixture of an
insulating spin liquid that produces the measured magnetic scaling behavior and
a Fermi liquid that becomes superconducting for doping levels $x>0.06$. Our
analysis suggests the existence of two quantum critical points, at doping
levels, $x \sim 0.05$ and $x \sim 0.22$, and that d-wave superconductivity in
the pseudogap region arises from quasiparticle-spin liquid interaction, i.e.
magnetic interactions between quasiparticles in the Fermi liquid induced by
their coupling to the spin liquid excitations.

31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
20
The categories of this paper are: acc-phys