Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum Hall effect in spin-degenerate Landau levels: Spin-orbit
  enhancement of the conductivity   The quantum Hall regime in a smooth random potential is considered when two
disorder-broadened Zeeman levels overlap strongly. Spin-orbit coupling is found
to cause a drastic change in the percolation network which leads to a strong
enhancement of the dissipative conductivity at finite temperature, provided the
Fermi level $E_F$ lies between the energies of two delocalized states
$E=\pm\Delta$, $2\Delta$ being the Zeeman splitting. The conductivity is shown
to exhibit a box-like behavior with changing magnetic field: $\sigma_{xx}$ is
$\sim e^2/h$ at $|E_F|<\Delta$ and exponentially small otherwise. Two peaks of
$\sigma_{xx}$ arising as $T\to 0$ are found to be strongly asymmetric.

1
The categories of this paper are: cs
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th