Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Backscattering in carbon nanotubes : role of quantum interference
  effects   For similar disorder, the backscattering contribution to the conductivity,
irrelevant for metallic single-walled carbon nanotubes, is proved to become
more significant for doped semiconducting systems, as found in experiments. In
the case of multi-walled nanotubes, the intershell coupling is further shown to
enhance the contribution of backscattering for "metallic" double-walled,
whereas it remains insignificant for "metallic/semiconducting" double-walled
systems. This supports that MWNTs are long ballistic conductors close to the
charge neutrality point.

7
The categories of this paper are: hep-th
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an