Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Surface quantized anomalous Hall current and magneto-electric effect in
  magnetically disordered topological insulators   We study theoretically the role of quenched magnetic disorder at the surface
of a topological insulator by numerical simulation and scaling analysis. It is
found that all the surface states are localized while the transverse
conductivity is quantized to be $\pm {{e^2} \over {2 h}}$ as long as the Fermi
energy is within the bulk gap. This greatly facilitates the realization of the
topological magnetoelectric effect proposed by Qi {\it et al.} (Phys. Rev.
B\textbf{78}, 195424 (2008)) with the surface magnetization direction being
controlled by the simultaneous application of magnetic and electric fields .

29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th