Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Special electronic structures and quantum conduction of B/P co-doping
  carbon nanotubes under electric field using the first principle   Boron (B)/phosphorus (P) doped single wall carbon nanotubes (B-PSWNTs) are
studied by using the First- Principle method based on density function theory
(DFT). Mayer bond order, band structure, electrons density and density of
states are calculated. It concludes that the B-PSWNTs have special band
structure which is quite different from BN nanotubes, and that metallic carbon
nanotubes will be converted to semiconductor due to boron/phosphorus co-doping
which breaks the symmetrical structure. The bonding forms in B-PSWNTs are
investigated in detail. Besides, Mulliken charge population and the quantum
conductance are also calculated to study the quantum transport characteristics
of B-PSWNT hetero-junction. It is found that the position of p-n junction in
this hetero-junction will be changed as the applied electric field increase and
it performs the characteristics of diode.

12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom