Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin-triplet superconductivity in Sr2RuO4 due to orbital and spin
  fluctuations: Analyses by two-dimensional renormalization group theory and
  self-consistent vertex-correction method   We study the mechanism of the triplet superconductivity (TSC) in
Sr$_2$RuO$_4$ based on the multiorbital Hubbard model. The electronic states
are studied using the recently developed renormalization group method combined
with the constrained random-phase-approximation, called the RG+cRPA method.
Thanks to the vertex correction (VC) for the susceptibility, which is dropped
in the mean-field-level approximations, strong orbital and spin fluctuations at
$Q \approx(2\pi/3,2\pi/3)$ emerge in the quasi one-dimensional Fermi surfaces
(FSs) composed of $d_{xz}+d_{yz}$ orbitals. Due to the cooperation of both
fluctuations, we obtain the triplet superconductivity in the $E_u$
representation, in which the superconducting gap is given by the linear
combination of $(\Delta_x(k),\Delta_y(k))\sim (\sin 3k_x,\sin 3k_y)$. Very
similar results are obtained by applying the diagrammatic calculation called
the self-consistent VC method. Thus, the idea of "orbital+spin fluctuation
mediated TSC" is confirmed by both RG+cRPA method and the self-consistent VC
method. We also reveal that a substantial superconducting gap on the
$d_{xy}$-orbital FS is induced from the gaps on the quasi one-dimensional FSs,
in consequence of the large orbital-mixture due to the 4$d$ spin-orbit
interaction.

37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg