Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Orbital Fluctuation-Induced Triplet Superconductivity : Mechanism of
  Superconductivity in ${\rm Sr}_{2}{\rm RuO}_{4}$   The mechanism of superconductivity in ${\rm Sr}_{2}{\rm RuO}_{4}$ is studied
using a degenerate Hubbard model within the weak coupling theory. When the
system approaches the orbital instability which is realized due to increasing
the on-site Coulomb interaction between the electrons in the different
orbitals, it is shown that the triplet superconductivity appears. This
superconducting mechanism is only available in orbitally degenerate systems
with multiple Fermi surfaces.

37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph