Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multiple Quantum Phases in Graphene with Enhanced Spin-Orbit Coupling:
  From the Quantum Spin Hall Regime to the Spin Hall Effect and a Robust
  Metallic State
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
26
The categories of this paper are: bayes-an
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
2
The categories of this paper are: math