Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A phenomenological model of the Resonance peak in High Tc
  Superconductors   A notable aspect of high-temperature superconductivity in the copper oxides
is the unconventional nature of the underlying paired-electron states. The
appearance of a resonance peak, observed in inelastic neutron spectroscopy in
the superconducting state of the High Tc cuprates, its apparent linear
correlation with the critical superconducting temperature of each of the
compounds and its disappearance in the normal state are rather intriguing. It
may well be that this peak is the signature of the singlet to triplet
excitation, and is an unique characteristic of a d-wave superconductor. We
develop a simple criterion for the resonance peak which is based on the concept
of twist sti ness and its disappearance at T=Tc.

24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs