Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Conductance through a single impurity in the metallic zigzag carbon
  nanotube   We investigate transport through a single impurity in metallic zigzag carbon
nanotube and find the conductance sensitively depends on the impurity strength
and the bias voltage. It is rather interesting that interplay between the
current-carrying scattering state and evanescent modes leads to rich phenomena
including resonant backward scattering, perfect tunneling and charge
accumulations. In addition, we also find a dual relation between the
backscattered conductance and the charge accumulation. At the end, relevance to
the experiments is discussed.

8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph