Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Valley polarization in graphene-silicene-graphene heterojunction   Considering the difference of energy bands in graphene and silicene, we put
forward a new model of the graphene-silicene-graphene (GSG) heterojunction. In
the GSG, we study the valley polarization properties in a zigzag nanoribbon in
the presence of an external electric field. We find the energy range associated
with the bulk gap of silicene has a valley polarization more than 95%. Under
the protection of the topological edge states of the silicene, the valley
polarization remains even the small non-magnetic disorder is introduced. These
results have certain practical significance in applications for future valley
valve.

15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th