Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin-polarized current induced by a local exchange field in a silicene
  nanoribbon   A mechanism to generate a spin-polarized current in a two-terminal zigzag
silicene nanoribbon is predicted. As a weak local exchange field that is
parallel to the surface of silicene is applied on one of edges of the silicene
nanoribbon, a gap is opened in the corresponding gapless edge states but
another pair of gapless edge states with opposite spin are still protected by
the time-reversal symmetry. Hence, a spin-polarized current can be induced in
the gap opened by the local exchange field in this two-terminal system. What is
important is that the spin-polarized current can be obtained even in the
absence of Rashba spin-orbit coupling and in the case of the very weak exchange
filed. That is to say, the mechanism to generate the spin-polarized currents
can be easily realized experimentally.We also find that the spin-polarized
current is insensitive to weak disorder.

0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
16
The categories of this paper are: stat
29
The categories of this paper are: funct-an