Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bulk and boundary zero-bias anomaly in multi-wall carbon nanotubes   We compute the tunneling density of states of doped multi-wall nanotubes
including disorder and electron-electron interactions. A non-conventional
Coulomb blockade reflecting nonperturbative Altshuler-Aronov-Lee power-law
zero-bias anomalies is found, in accordance with recent experimental results.
The presence of a boundary implies a universal doubling of the boundary
exponent in the diffusive limit.

6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
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The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph