Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Orbital mixture effect on the Fermi surface-$T_c$ correlation in the
  cuprate superconductors --- bilayer vs single layer   By constructing $d_{x^2-y^2}-d_{z^2}$ two-orbital models from first
principles, we have obtained a systematic correlation between the Fermi surface
warping and the evaluated $T_c$ for various bilayer as well as single-layer
cuprates. This reveals that smaller mixture of the $d_{z^2}$ orbital component
on the Fermi surface leads to both of larger Fermi surface warping and higher
$T_c$. The theoretical correlation strikingly resembles a systematic plot for
the experimentally observed $T_c$ against the Fermi surface warping due to
Pavarini {\it et al.} [Phys. Rev. Lett. {\bf 87}, 047003 (2001)], and the
present result unambiguously indicates that the $d_{z^2}$ mixture is a key
factor that determines $T_c$ in the cuprates.

27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph