Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum spin Hall effect induced by non-magnetic and magnetic staggered
  potentials   We have a comparative study of the quantum spin Hall (QSH) effects induced by
non-magnetic and magnetic staggered potentials respectively and show that they
have the same effect in driving the topological phase transition. The result
implies that both time-reversal (${\cal T}$) preserving and breaking systems
can host QSH effect. We also investigate the stability of the resulting QSH
effect to disorder and find that for ${\cal T}$ invariant system the edge
states are always robust while those of ${\cal T}$ breaking system are also
robust if there is additional symmetry in the system.

28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys