Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nanosize confinement induced enhancement of spontaneous polarization in
  a ferroelectric nanowire   We theoretically showed that the spontaneous polarization in ferroelectric
(FE) nanowires (NWs) can be considerably enhanced due to the nanosize
confinement by the first-principles calculations. The spontaneous polarization
along the wire direction in a fully-relaxed PbTiO3 NW with 1.8 nm diameter is
1.26 times higher than that of bulk counterpart. The tension induced by NW
surface curvature counteracts the near-surface depolarizing effect and
meanwhile leads to the unusual enhancement of spontaneous polarization. These
findings indicated that FE NWs can be promising in the applications of
nanodevices.

17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph