Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Metal-insulator transition in a multilayer system with a strong magnetic
  field   We study the Anderson localization in a weakly coupled multilayer system with
a strong magnetic field perpendicular to the layers. The phase diagram of 1/3
flux quanta per plaquette is obtained. The phase diagram shows that a
three-dimensional quantum Hall effect phase exists for a weak on-site disorder.
For intermediate disorder, the system has insulating and normal metallic phases
separated by a mobility edge. At an even larger disorder, all states are
localized and the system is an insulator. The critical exponent of the
localization length is found to be $\nu=1.57\pm0.10$.

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The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph